i dont know any message for this. Still would like that audio will work in Flatpak

Audio did not work, but better debug handling.

.github/workflows/nightly-artifacts.yml

@@ -34,11 +34,11 @@ jobs:
           Add-Content -Path $env:GITHUB_ENV -Value "SHORT_SHA=$shortSha"
           Add-Content -Path $env:GITHUB_ENV -Value "ASSET_BASENAME=praktiKST-$version-$shortSha"
 
-      - name: Set up Java 17
+      - name: Set up Java 21
         uses: actions/setup-java@v4.1.0
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "21"
 
       - name: Install WiX Toolset
         shell: pwsh
@@ -89,11 +89,11 @@ jobs:
           SHORT_SHA="${GITHUB_SHA::7}"
           echo "ASSET_BASENAME=KST4Contest-${VERSION}-${SHORT_SHA}" >> "$GITHUB_ENV"
 
-      - name: Set up Java 17
+      - name: Set up Java 21
         uses: actions/setup-java@v4.1.0
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "21"
 
       - name: Ensure mvnw is executable
         run: chmod +x mvnw
@@ -169,11 +169,11 @@ jobs:
           SHORT_SHA="${GITHUB_SHA::7}"
           echo "ASSET_BASENAME=KST4Contest-${VERSION}-${SHORT_SHA}" >> "$GITHUB_ENV"
 
-      - name: Set up Java 17
+      - name: Set up Java 21
         uses: actions/setup-java@v4.1.0
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "21"
 
       - name: Install packaging dependencies
         run: |
@@ -199,6 +199,7 @@ jobs:
             --main-class kst4contest.view.Kst4ContestApplication \
             --module-path target/dist-libs \
             --add-modules javafx.controls,javafx.graphics,javafx.fxml,javafx.web,javafx.media,java.sql,java.net.http,jdk.crypto.ec \
+            --linux-package-deps "libgstreamer1.0-0,libgstreamer-plugins-base1.0-0,gstreamer1.0-plugins-good" \
             --dest dist
           DEB="$(ls dist/*.deb | head -n 1)"
           if [ -z "$DEB" ]; then
@@ -227,11 +228,11 @@ jobs:
           SHORT_SHA="${GITHUB_SHA::7}"
           echo "ASSET_BASENAME=KST4Contest-${VERSION}-${SHORT_SHA}" >> "$GITHUB_ENV"
 
-      - name: Set up Java 17
+      - name: Set up Java 21
         uses: actions/setup-java@v4.1.0
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "21"
 
       - name: Install packaging dependencies
         run: |
@@ -257,6 +258,7 @@ jobs:
             --main-class kst4contest.view.Kst4ContestApplication \
             --module-path target/dist-libs \
             --add-modules javafx.controls,javafx.graphics,javafx.fxml,javafx.web,javafx.media,java.sql,java.net.http,jdk.crypto.ec \
+            --linux-package-deps "gstreamer1,gstreamer1-plugins-base,gstreamer1-plugins-good" \
             --dest dist
           RPM="$(ls dist/*.rpm | head -n 1)"
           if [ -z "$RPM" ]; then
@@ -287,11 +289,11 @@ jobs:
           echo "SHORT_SHA=$SHORT_SHA" >> "$GITHUB_ENV"
           echo "ASSET_BASENAME=KST4Contest-${VERSION}-${SHORT_SHA}" >> "$GITHUB_ENV"
 
-      - name: Set up Java 17
+      - name: Set up Java 21
         uses: actions/setup-java@v4.1.0
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "21"
 
       - name: Install packaging dependencies
         run: |
@@ -346,21 +348,42 @@ jobs:
           if [ -f "$PKGROOT/usr/lib/KST4Contest/lib/KST4Contest.png" ]; then
             cp "$PKGROOT/usr/lib/KST4Contest/lib/KST4Contest.png" "$PKGROOT/usr/share/icons/hicolor/256x256/apps/KST4Contest.png"
           fi
-          INSTALLED_SIZE=$(du -sk "$PKGROOT" | cut -f1)
+          INSTALLED_SIZE=$(du -sb "$PKGROOT" | cut -f1)
-          cat > "$PKGROOT/.PKGINFO" << EOF
+          BUILDDATE=$(date +%s)
-          pkgname = kst4contest
+          WORKFLOW_SHA256=$(sha256sum "$GITHUB_WORKSPACE/.github/workflows/nightly-artifacts.yml" | awk '{print $1}')
-          pkgbase = kst4contest
+          {
-          pkgver = ${PKGVER}-1
+            echo "pkgname = kst4contest"
-          pkgdesc = KST4Contest amateur radio contest logger
+            echo "pkgbase = kst4contest"
-          url = https://github.com/${{ github.repository }}
+            echo "xdata = pkgtype=pkg"
-          builddate = $(date +%s)
+            echo "pkgver = ${PKGVER}-1"
-          packager = GitHub Actions
+            echo "pkgdesc = KST4Contest amateur radio contest logger"
-          size = ${INSTALLED_SIZE}
+            echo "url = https://github.com/${{ github.repository }}"
-          arch = ${ARCH}
+            echo "builddate = ${BUILDDATE}"
-          license = custom
+            echo "packager = GitHub Actions"
-          depend = java-runtime
+            echo "size = ${INSTALLED_SIZE}"
-          EOF
+            echo "arch = ${ARCH}"
-          tar --zstd -cf "dist/${ASSET_BASENAME}-archlinux-${ARCH}.pkg.tar.zst" -C "$PKGROOT" .
+            echo "license = custom"
+            echo "depend = java-runtime"
+            echo "depend = gst-plugins-base"
+            echo "depend = gst-plugins-good"
+          } > "$PKGROOT/.PKGINFO"
+          {
+            echo "format = 2"
+            echo "pkgname = kst4contest"
+            echo "pkgbase = kst4contest"
+            echo "pkgver = ${PKGVER}-1"
+            echo "pkgarch = ${ARCH}"
+            echo "pkgbuild_sha256sum = ${WORKFLOW_SHA256}"
+            echo "packager = GitHub Actions"
+            echo "builddate = ${BUILDDATE}"
+            echo "builddir = /build"
+            echo "startdir = /build"
+            echo "buildtool = makepkg"
+            echo "buildtoolver = 7.0.0-1-x86_64"
+            echo "buildenv = !distcc !color !ccache check !sign"
+            echo "options = !strip docs libtool staticlibs emptydirs zipman purge !debug !lto"
+          } > "$PKGROOT/.BUILDINFO"
+          tar --zstd --transform 's|^\./||' -cf "dist/${ASSET_BASENAME}-archlinux-${ARCH}.pkg.tar.zst" -C "$PKGROOT" .
 
       - name: Upload Arch Linux artifact
         uses: actions/upload-artifact@v4.3.4
@@ -385,11 +408,11 @@ jobs:
           echo "SHORT_SHA=$SHORT_SHA" >> "$GITHUB_ENV"
           echo "ASSET_BASENAME=KST4Contest-${VERSION}-${SHORT_SHA}" >> "$GITHUB_ENV"
 
-      - name: Set up Java 17
+      - name: Set up Java 21
         uses: actions/setup-java@v4.1.0
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "21"
 
       - name: Ensure mvnw is executable
         run: chmod +x mvnw
@@ -428,14 +451,18 @@ jobs:
           finish-args:
             - --socket=wayland
             - --socket=x11
+            - --socket=pulseaudio
             - --share=network
             - --share=ipc
             - --device=dri
+            - --filesystem=~/.praktiKST
+            - --env=ALSA_CONFIG_PATH=/app/share/alsa/asound.conf
           modules:
             - name: kst4contest
               buildsystem: simple
               build-commands:
-                - install -d /app/lib/KST4Contest /app/bin /app/share/applications
+                - install -d /app/lib/KST4Contest /app/bin /app/share/applications /app/share/alsa
+                - printf '@include /usr/share/alsa/alsa.conf\npcm.!default { type pulse }\nctl.!default { type pulse }\n' > /app/share/alsa/asound.conf
                 - cp -a . /app/lib/KST4Contest/
                 - printf '#!/bin/sh\nexec /app/lib/KST4Contest/bin/KST4Contest "$@"\n' > /app/bin/KST4Contest
                 - chmod 755 /app/bin/KST4Contest
@@ -572,11 +599,11 @@ jobs:
           echo "ASSET_BASENAME=KST4Contest-${VERSION}-${SHORT_SHA}" >> "$GITHUB_ENV"
           echo "ARCH=$ARCH" >> "$GITHUB_ENV"
 
-      - name: Set up Java 17
+      - name: Set up Java 21
         uses: actions/setup-java@v4.1.0
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "21"
 
       - name: Ensure mvnw is executable
         run: chmod +x mvnw

.github/workflows/pr-compile-check.yml

@@ -11,18 +11,18 @@ env:
 
 jobs:
   compile:
-    name: Compile (Java 17)
+    name: Compile (Java 21)
     runs-on: ubuntu-latest
 
     steps:
       - name: Checkout
         uses: actions/checkout@v4.1.7
 
-      - name: Set up Java 17
+      - name: Set up Java 21
         uses: actions/setup-java@v4.1.0
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "21"
 
       - name: Ensure mvnw is executable
         run: chmod +x mvnw

.github/workflows/tagged-release.yml

@@ -22,11 +22,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4.1.7
 
-      - name: Set up Java 17
+      - name: Set up Java 21
         uses: actions/setup-java@v4.1.0
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "21"
 
       - name: Install WiX Toolset
         shell: pwsh
@@ -70,11 +70,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4.1.7
 
-      - name: Set up Java 17
+      - name: Set up Java 21
         uses: actions/setup-java@v4.1.0
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "21"
 
       - name: Ensure mvnw is executable
         run: chmod +x mvnw
@@ -143,11 +143,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4.1.7
 
-      - name: Set up Java 17
+      - name: Set up Java 21
         uses: actions/setup-java@v4.1.0
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "21"
 
       - name: Install packaging dependencies
         run: |
@@ -173,6 +173,7 @@ jobs:
             --main-class kst4contest.view.Kst4ContestApplication \
             --module-path target/dist-libs \
             --add-modules javafx.controls,javafx.graphics,javafx.fxml,javafx.web,javafx.media,java.sql,java.net.http,jdk.crypto.ec \
+            --linux-package-deps "libgstreamer1.0-0,libgstreamer-plugins-base1.0-0,gstreamer1.0-plugins-good" \
             --dest dist
           DEB="$(ls dist/*.deb | head -n 1)"
           if [ -z "$DEB" ]; then
@@ -194,11 +195,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4.1.7
 
-      - name: Set up Java 17
+      - name: Set up Java 21
         uses: actions/setup-java@v4.1.0
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "21"
 
       - name: Install packaging dependencies
         run: |
@@ -224,6 +225,7 @@ jobs:
             --main-class kst4contest.view.Kst4ContestApplication \
             --module-path target/dist-libs \
             --add-modules javafx.controls,javafx.graphics,javafx.fxml,javafx.web,javafx.media,java.sql,java.net.http,jdk.crypto.ec \
+            --linux-package-deps "gstreamer1,gstreamer1-plugins-base,gstreamer1-plugins-good" \
             --dest dist
           RPM="$(ls dist/*.rpm | head -n 1)"
           if [ -z "$RPM" ]; then
@@ -245,11 +247,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4.1.7
 
-      - name: Set up Java 17
+      - name: Set up Java 21
         uses: actions/setup-java@v4.1.0
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "21"
 
       - name: Install packaging dependencies
         run: |
@@ -304,21 +306,42 @@ jobs:
           if [ -f "$PKGROOT/usr/lib/KST4Contest/lib/KST4Contest.png" ]; then
             cp "$PKGROOT/usr/lib/KST4Contest/lib/KST4Contest.png" "$PKGROOT/usr/share/icons/hicolor/256x256/apps/KST4Contest.png"
           fi
-          INSTALLED_SIZE=$(du -sk "$PKGROOT" | cut -f1)
+          INSTALLED_SIZE=$(du -sb "$PKGROOT" | cut -f1)
-          cat > "$PKGROOT/.PKGINFO" << EOF
+          BUILDDATE=$(date +%s)
-          pkgname = kst4contest
+          WORKFLOW_SHA256=$(sha256sum "$GITHUB_WORKSPACE/.github/workflows/tagged-release.yml" | awk '{print $1}')
-          pkgbase = kst4contest
+          {
-          pkgver = ${PKGVER}-1
+            echo "pkgname = kst4contest"
-          pkgdesc = KST4Contest amateur radio contest logger
+            echo "pkgbase = kst4contest"
-          url = https://github.com/${{ github.repository }}
+            echo "xdata = pkgtype=pkg"
-          builddate = $(date +%s)
+            echo "pkgver = ${PKGVER}-1"
-          packager = GitHub Actions
+            echo "pkgdesc = KST4Contest amateur radio contest logger"
-          size = ${INSTALLED_SIZE}
+            echo "url = https://github.com/${{ github.repository }}"
-          arch = ${ARCH}
+            echo "builddate = ${BUILDDATE}"
-          license = custom
+            echo "packager = GitHub Actions"
-          depend = java-runtime
+            echo "size = ${INSTALLED_SIZE}"
-          EOF
+            echo "arch = ${ARCH}"
-          tar --zstd -cf "dist/KST4Contest-${{ github.ref_name }}-archlinux-${ARCH}.pkg.tar.zst" -C "$PKGROOT" .
+            echo "license = custom"
+            echo "depend = java-runtime"
+            echo "depend = gst-plugins-base"
+            echo "depend = gst-plugins-good"
+          } > "$PKGROOT/.PKGINFO"
+          {
+            echo "format = 2"
+            echo "pkgname = kst4contest"
+            echo "pkgbase = kst4contest"
+            echo "pkgver = ${PKGVER}-1"
+            echo "pkgarch = ${ARCH}"
+            echo "pkgbuild_sha256sum = ${WORKFLOW_SHA256}"
+            echo "packager = GitHub Actions"
+            echo "builddate = ${BUILDDATE}"
+            echo "builddir = /build"
+            echo "startdir = /build"
+            echo "buildtool = makepkg"
+            echo "buildtoolver = 7.0.0-1-x86_64"
+            echo "buildenv = !distcc !color !ccache check !sign"
+            echo "options = !strip docs libtool staticlibs emptydirs zipman purge !debug !lto"
+          } > "$PKGROOT/.BUILDINFO"
+          tar --zstd --transform 's|^\./||' -cf "dist/KST4Contest-${{ github.ref_name }}-archlinux-${ARCH}.pkg.tar.zst" -C "$PKGROOT" .
 
       - name: Upload Arch Linux artifact
         uses: actions/upload-artifact@v4.3.4
@@ -334,11 +357,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4.1.7
 
-      - name: Set up Java 17
+      - name: Set up Java 21
         uses: actions/setup-java@v4.1.0
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "21"
 
       - name: Ensure mvnw is executable
         run: chmod +x mvnw
@@ -377,14 +400,18 @@ jobs:
           finish-args:
             - --socket=wayland
             - --socket=x11
+            - --socket=pulseaudio
             - --share=network
             - --share=ipc
             - --device=dri
+            - --filesystem=~/.praktiKST
+            - --env=ALSA_CONFIG_PATH=/app/share/alsa/asound.conf
           modules:
             - name: kst4contest
               buildsystem: simple
               build-commands:
-                - install -d /app/lib/KST4Contest /app/bin /app/share/applications
+                - install -d /app/lib/KST4Contest /app/bin /app/share/applications /app/share/alsa
+                - printf '@include /usr/share/alsa/alsa.conf\npcm.!default { type pulse }\nctl.!default { type pulse }\n' > /app/share/alsa/asound.conf
                 - cp -a . /app/lib/KST4Contest/
                 - printf '#!/bin/sh\nexec /app/lib/KST4Contest/bin/KST4Contest "$@"\n' > /app/bin/KST4Contest
                 - chmod 755 /app/bin/KST4Contest
@@ -461,11 +488,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4.1.7
 
-      - name: Set up Java 17
+      - name: Set up Java 21
         uses: actions/setup-java@v4.1.0
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "21"
 
       - name: Ensure mvnw is executable
         run: chmod +x mvnw

pom.xml

@@ -24,12 +24,12 @@
         <launcher>${project.artifactId}</launcher>
         <appName>${project.artifactId}</appName>
         <main.class>kst4contest.view.Kst4ContestApplication</main.class>
-        <java.version>17</java.version>
+        <java.version>21</java.version>
         <required.maven.version>3.6.3</required.maven.version>
         <jar.filename>${project.artifactId}-${project.version}</jar.filename>
 
         <!-- Dependency versions -->
-        <javafx.version>19.0.2.1</javafx.version>
+        <javafx.version>21.0.5</javafx.version>
         <jetbrains.annotations.version>24.0.1</jetbrains.annotations.version>
         <junit.version>5.10.1</junit.version>
         <lombok.version>1.18.44</lombok.version>
@@ -50,8 +50,8 @@
         <maven.wrapper.plugin>3.2.0</maven.wrapper.plugin>
         <moditect.maven.plugin>1.0.0.RC2</moditect.maven.plugin>
         <jpackage.maven.plugin>0.1.3</jpackage.maven.plugin>
-        <maven.pmd.version>3.21.2</maven.pmd.version>
+        <maven.pmd.version>3.28.0</maven.pmd.version>
-        <pmd.version>6.55.0</pmd.version>
+        <pmd.version>7.17.0</pmd.version>
         <codehaus.version.plugin>2.16.1</codehaus.version.plugin>
         <javafx.maven.plugin>0.0.8</javafx.maven.plugin>
         <spotbugs.maven.plugin>4.9.8.2</spotbugs.maven.plugin>
@@ -93,6 +93,13 @@
             <version>${javafx.version}</version>
         </dependency>
 
+        <!-- JLayer: pure-Java MP3 decoder, used instead of JavaFX Media for Flatpak audio compatibility -->
+        <dependency>
+            <groupId>javazoom</groupId>
+            <artifactId>jlayer</artifactId>
+            <version>1.0.1</version>
+        </dependency>
+
         <!-- SQLite -->
         <dependency>
             <groupId>org.xerial</groupId>
@@ -280,30 +287,7 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-pmd-plugin</artifactId>
                 <version>${maven.pmd.version}</version>
-                <dependencies>
-                    <dependency>
-                        <groupId>net.sourceforge.pmd</groupId>
-                        <artifactId>pmd-core</artifactId>
-                        <version>${pmd.version}</version>
-                    </dependency>
-                    <dependency>
-                        <groupId>net.sourceforge.pmd</groupId>
-                        <artifactId>pmd-java</artifactId>
-                        <version>${pmd.version}</version>
-                    </dependency>
-                    <dependency>
-                        <groupId>net.sourceforge.pmd</groupId>
-                        <artifactId>pmd-javascript</artifactId>
-                        <version>${pmd.version}</version>
-                    </dependency>
-                    <dependency>
-                        <groupId>net.sourceforge.pmd</groupId>
-                        <artifactId>pmd-jsp</artifactId>
-                        <version>${pmd.version}</version>
-                    </dependency>
-                </dependencies>
                 <configuration>
-                    <sourceEncoding>${project.build.sourceEncoding}</sourceEncoding>
                     <minimumTokens>100</minimumTokens>
                     <targetJdk>${java.version}</targetJdk>
                     <linkXRef>false</linkXRef>
@@ -436,6 +420,7 @@
                                 <addmodule>javafx.graphics</addmodule>
                                 <addmodule>javafx.fxml</addmodule>
                                 <addmodule>javafx.web</addmodule>
+                                <addmodule>javafx.media</addmodule>
                                 <addmodule>java.sql</addmodule>
                                 <addmodule>java.net.http</addmodule>
                                 <addmodule>jdk.crypto.ec</addmodule>

src/main/java/kst4contest/utils/PlayAudioUtils.java

@@ -1,13 +1,18 @@
 package kst4contest.utils;
 
-import javafx.scene.media.Media;
+import javazoom.jl.decoder.JavaLayerException;
-import javafx.scene.media.MediaPlayer;
+import javazoom.jl.player.Player;
 import kst4contest.ApplicationConstants;
 
-import java.io.File;
+import java.io.BufferedInputStream;
+import java.io.FileInputStream;
+import java.io.IOException;
 import java.util.Arrays;
-import java.util.LinkedList;
 import java.util.Queue;
+import java.util.concurrent.ConcurrentLinkedQueue;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.atomic.AtomicBoolean;
 
 /**
  * This part of the client drives the sounds. Its a singleton instance. All audio outs are directed to this instance.<br>
@@ -113,8 +118,16 @@ public class PlayAudioUtils {
 
     }
 
-    private Queue<Media> musicList = new LinkedList<Media>();
+    private final Queue<String> musicList = new ConcurrentLinkedQueue<>();
-    private MediaPlayer mediaPlayer ;
+    /** True once audio fails; prevents repeated error logs and further play attempts. */
+    private final AtomicBoolean audioUnavailable = new AtomicBoolean(false);
+    /** True while the drain loop is running; prevents duplicate concurrent drains. */
+    private final AtomicBoolean playing = new AtomicBoolean(false);
+    private final ExecutorService audioThread = Executors.newSingleThreadExecutor(r -> {
+        Thread t = new Thread(r, "audio-player");
+        t.setDaemon(true);
+        return t;
+    });
 
     /**
      * Plays notification sounds out of the windws 95 box by given action character<br/>
@@ -131,40 +144,31 @@ public class PlayAudioUtils {
      */
     public void playNoiseLauncher(char actionChar) {
 
-
-
-//        ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/NOISESTARTUP.mp3");
-
-
         switch (actionChar){
             case '-':
-                    musicList.add(new Media(new File (ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/tick.mp3")).toURI().toString()));
+                musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/tick.mp3"));
                 break;
             case '!':
-                    musicList.add(new Media(new File (ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/NOISESTARTUP.mp3")).toURI().toString()));
+                musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/NOISESTARTUP.mp3"));
                 break;
             case 'C':
-                    musicList.add(new Media(new File (ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/NOISECQWINDOW.mp3")).toURI().toString()));
+                musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/NOISECQWINDOW.mp3"));
                 break;
             case 'P':
-                    musicList.add(new Media(new File (ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/NOISEPMWINDOW.mp3")).toURI().toString()));
+                musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/NOISEPMWINDOW.mp3"));
                 break;
             case 'E':
-                    musicList.add(new Media(new File (ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/NOISEERROR.mp3")).toURI().toString()));
+                musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/NOISEERROR.mp3"));
                 break;
             case 'N':
-                    musicList.add(new Media(new File (ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/NOISENOTIFY.mp3")).toURI().toString()));
+                musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/NOISENOTIFY.mp3"));
                 break;
-//                case 'M':
-//                    musicList.add(new Media(new File ("VOICE.mp3").toURI().toString()));
-//                    break;
 
             default:
                 System.out.println("[KST4ContestApp, warning, letter not defined!]");
 
         }
         playMusic();
-//		mediaPlayer.dispose();
 
     }
 
@@ -183,125 +187,124 @@ public class PlayAudioUtils {
         for (char letterToPlay: playThisInCW){
             switch (letterToPlay){
                 case 'A':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRA.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRA.mp3"));
                     break;
                 case 'B':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRB.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRB.mp3"));
                     break;
                 case 'C':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRC.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRC.mp3"));
                     break;
                 case 'D':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRD.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRD.mp3"));
                     break;
                 case 'E':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRE.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRE.mp3"));
                     break;
                 case 'F':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRF.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRF.mp3"));
                     break;
                 case 'G':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRG.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRG.mp3"));
                     break;
                 case 'H':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRH.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRH.mp3"));
                     break;
                 case 'I':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRI.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRI.mp3"));
                     break;
                 case 'J':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRJ.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRJ.mp3"));
                     break;
                 case 'K':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRK.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRK.mp3"));
                     break;
                 case 'L':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRL.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRL.mp3"));
                     break;
                 case 'M':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRM.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRM.mp3"));
                     break;
                 case 'N':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRN.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRN.mp3"));
                     break;
                 case 'O':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRO.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRO.mp3"));
                     break;
                 case 'P':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRP.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRP.mp3"));
                     break;
                 case 'Q':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRQ.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRQ.mp3"));
                     break;
                 case 'R':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRR.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRR.mp3"));
                     break;
                 case 'S':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRS.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRS.mp3"));
                     break;
                 case 'T':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRT.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRT.mp3"));
                     break;
                 case 'U':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRU.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRU.mp3"));
                     break;
                 case 'V':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRV.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRV.mp3"));
                     break;
                 case 'W':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRW.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRW.mp3"));
                     break;
                 case 'X':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRX.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRX.mp3"));
                     break;
                 case 'Y':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRY.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRY.mp3"));
                     break;
                 case 'Z':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRZ.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRZ.mp3"));
                     break;
                 case '1':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR1.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR1.mp3"));
                     break;
                 case '2':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR2.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR2.mp3"));
                     break;
                 case '3':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR3.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR3.mp3"));
                     break;
                 case '4':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR4.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR4.mp3"));
                     break;
                 case '5':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR5.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR5.mp3"));
                     break;
                 case '6':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR6.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR6.mp3"));
                     break;
                 case '7':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR7.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR7.mp3"));
                     break;
                 case '8':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR8.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR8.mp3"));
                     break;
                 case '9':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR9.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR9.mp3"));
                     break;
                 case '0':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR0.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTR0.mp3"));
                     break;
                 case '/':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRSTROKE.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRSTROKE.mp3"));
                     break;
                 case ' ':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRSPACE.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/LTTRSPACE.mp3"));
                     break;
                 default:
                     System.out.println("[KST4ContestApp, warning, letter not defined:] cwLetters = " + Arrays.toString(playThisInCW));
             }
         }
         playMusic();
-//		mediaPlayer.dispose();
 
     }
 
@@ -323,162 +326,166 @@ public class PlayAudioUtils {
         for (char letterToPlay: spellThisWithVoice){
             switch (letterToPlay){
                 case '!':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEBELL.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEBELL.mp3"));
                     break;
                 case '?':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEYOUGOTMAIL.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEYOUGOTMAIL.mp3"));
                     break;
                 case '#':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEHELLO.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEHELLO.mp3"));
                     break;
                 case '*':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE73.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE73.mp3"));
                     break;
                 case '$':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICESTROKEPORTABLE.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICESTROKEPORTABLE.mp3"));
                     break;
                 case 'A':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEA.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEA.mp3"));
                     break;
                 case 'B':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEB.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEB.mp3"));
                     break;
                 case 'C':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEC.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEC.mp3"));
                     break;
                 case 'D':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICED.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICED.mp3"));
                     break;
                 case 'E':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEE.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEE.mp3"));
                     break;
                 case 'F':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEF.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEF.mp3"));
                     break;
                 case 'G':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEG.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEG.mp3"));
                     break;
                 case 'H':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEH.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEH.mp3"));
                     break;
                 case 'I':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEI.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEI.mp3"));
                     break;
                 case 'J':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEJ.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEJ.mp3"));
                     break;
                 case 'K':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEK.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEK.mp3"));
                     break;
                 case 'L':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEL.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEL.mp3"));
                     break;
                 case 'M':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEM.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEM.mp3"));
                     break;
                 case 'N':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEN.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEN.mp3"));
                     break;
                 case 'O':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEO.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEO.mp3"));
                     break;
                 case 'P':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEP.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEP.mp3"));
                     break;
                 case 'Q':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEQ.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEQ.mp3"));
                     break;
                 case 'R':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICER.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICER.mp3"));
                     break;
                 case 'S':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICES.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICES.mp3"));
                     break;
                 case 'T':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICET.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICET.mp3"));
                     break;
                 case 'U':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEU.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEU.mp3"));
                     break;
                 case 'V':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEV.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEV.mp3"));
                     break;
                 case 'W':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEW.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEW.mp3"));
                     break;
                 case 'X':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEX.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEX.mp3"));
                     break;
                 case 'Y':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEY.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEY.mp3"));
                     break;
                 case 'Z':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEZ.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICEZ.mp3"));
                     break;
                 case '1':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE1.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE1.mp3"));
                     break;
                 case '2':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE2.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE2.mp3"));
                     break;
                 case '3':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE3.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE3.mp3"));
                     break;
                 case '4':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE4.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE4.mp3"));
                     break;
                 case '5':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE5.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE5.mp3"));
                     break;
                 case '6':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE6.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE6.mp3"));
                     break;
                 case '7':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE7.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE7.mp3"));
                     break;
                 case '8':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE8.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE8.mp3"));
                     break;
                 case '9':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE9.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE9.mp3"));
                     break;
                 case '0':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE0.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICE0.mp3"));
                     break;
                 case '/':
-                    musicList.add(new Media(new File(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICESTROKE.mp3")).toURI().toString()));
+                    musicList.add(ApplicationFileUtils.getFilePath(ApplicationConstants.APPLICATION_NAME, "/VOICESTROKE.mp3"));
                     break;
-//				case ' ':
-//					musicList.add(new Media(new File ("VOICESPACE.mp3").toURI().toString()));
-//					break;
                 default:
                     System.out.println("[KST4ContestApp, warning, letter not defined:] cwLetters = " + Arrays.toString(spellThisWithVoice));
             }
         }
         playMusic();
-//		mediaPlayer.dispose();
 
     }
-    private void playMusic() {
 
-//		System.out.println("Kst4ContestApplication.playMusic");
+    private void playMusic() {
-        if(musicList.peek() == null)
+        if (audioUnavailable.get()) {
-        {
+            musicList.clear();
             return;
         }
-        mediaPlayer = new MediaPlayer(musicList.poll());
+        // Only start a drain loop if none is running; the running loop will pick up new items itself.
-        mediaPlayer.setRate(1.0);
+        if (!playing.compareAndSet(false, true)) return;
-
+        audioThread.submit(() -> {
-        mediaPlayer.setOnReady(() -> {
+            String path;
-            mediaPlayer.play();
+            while ((path = musicList.poll()) != null) {
-            mediaPlayer.setOnEndOfMedia(() -> {
+                if (audioUnavailable.get()) break;
-//				mediaPlayer.dispose();
+                try (FileInputStream fis = new FileInputStream(path);
+                     BufferedInputStream bis = new BufferedInputStream(fis)) {
+                    new Player(bis).play();
+                } catch (IOException | JavaLayerException e) {
+                    audioUnavailable.set(true);
+                    musicList.clear();
+                    System.out.println("[KST4ContestApp, warning, audio playback disabled (could not create media player): " + e + "]");
+                    break;
+                }
+            }
+            playing.set(false);
+            // Items may have been enqueued between the last poll() and playing.set(false);
+            // restart the drain loop if so.
+            if (!musicList.isEmpty() && !audioUnavailable.get()) {
                 playMusic();
-                if (musicList.isEmpty()) {
-//					mediaPlayer.dispose();
             }
         });
-        });
-
     }
 }

src/main/java/module-info.java

@@ -6,6 +6,7 @@ module praktiKST {
 	requires java.sql;
     requires javafx.media;
     requires jdk.jsobject;
+    requires jlayer;
     requires java.net.http;
     requires java.desktop;
 	requires jdk.crypto.ec;