#1170 resolves issue with MP3 encoded audio raspy. Adds auto-clipping of PCM audio prior to encoding and adds 4x new 32-bit input sample rate selections to choose from, in addition to original 4x 16-bit input formats. (#1171)

Co-authored-by: Dennis Sheirer <dsheirer@github.com>

src/main/java/io/github/dsheirer/alias/action/beep/BeepAction.java

@@ -71,7 +71,7 @@ public class BeepAction extends RecurringAction
 	@Override
 	public void performAction(Alias alias, IMessage message )
 	{
-		DataLine.Info info = new DataLine.Info(Clip.class, AudioFormats.PCM_SIGNED_8_KHZ_16BITS_MONO);
+		DataLine.Info info = new DataLine.Info(Clip.class, AudioFormats.PCM_SIGNED_8000_HZ_16_BIT_MONO);
 
 		if(!AudioSystem.isLineSupported(info))
 		{
@@ -82,7 +82,7 @@ public class BeepAction extends RecurringAction
 		try
 		{
 			Clip clip = (Clip)AudioSystem.getLine(info);
-			clip.open(AudioFormats.PCM_SIGNED_8_KHZ_16BITS_MONO, mToneBytes, 0, mToneBytes.length);
+			clip.open(AudioFormats.PCM_SIGNED_8000_HZ_16_BIT_MONO, mToneBytes, 0, mToneBytes.length);
 			clip.start();
 		}
 		catch(Exception e)

src/main/java/io/github/dsheirer/audio/AudioFormats.java

@@ -24,112 +24,107 @@ import javax.sound.sampled.DataLine;
 import javax.sound.sampled.Line;
 import javax.sound.sampled.SourceDataLine;
 
+/**
+ * Audio formats
+ */
 public class AudioFormats
 {
-	public static final AudioFormat.Encoding IMBE_ENCODING = 
-			new AudioFormat.Encoding( "IMBE" );
-
 	public static final boolean LITTLE_ENDIAN = false;
-	public static final boolean BIG_ENDIAN = true;
-	
-	public static final float IMBE_FRAME_RATE = 50;
-	public static final float IMBE_SAMPLE_RATE = 50;
 
 	public static final float PCM_8_KHZ_RATE = 8000;
 	public static final float PCM_16_KHZ_RATE = 16000;
 	public static final float PCM_22050_HZ_RATE = 22050;
 	public static final float PCM_44100_HZ_RATE = 44100;
-	public static final float PCM_48_KHZ_RATE = 48000;
+
-	
-	public static final int IMBE_FRAME_SIZE_BYTES = 18;
-	public static final int IMBE_SAMPLE_SIZE_BITS = 144;
 	public static final int ONE_CHANNEL = 1;
 	public static final int TWO_CHANNELS = 2;
-	public static final int PCM_SAMPLE_SIZE_BITS = 16;
+	public static final int PCM_SAMPLE_SIZE_16_BITS = 16;
-	public static final int PCM_FRAME_SIZE_BYTES_MONO = 2;
+	public static final int PCM_SAMPLE_SIZE_32_BITS = 32;
-	public static final int PCM_FRAME_SIZE_BYTES_STEREO = 4;
+	public static final int PCM_FRAME_SIZE_BYTES_16_BIT_MONO = 2;
-	
+	public static final int PCM_FRAME_SIZE_BYTES_32_BIT_MONO = 4;
-	public static AudioFormat IMBE_AUDIO_FORMAT = 
+	public static final int PCM_FRAME_SIZE_BYTES_16_BIT_STEREO = 4;
-				new AudioFormat( IMBE_ENCODING, 
-								 IMBE_SAMPLE_RATE,
-								 IMBE_SAMPLE_SIZE_BITS,
-								 ONE_CHANNEL, 
-								 IMBE_FRAME_SIZE_BYTES, 
-								 IMBE_FRAME_RATE,
-								 LITTLE_ENDIAN );
-	
-	public static AudioFormat PCM_SIGNED_8_KHZ_16BITS_MONO =
-						new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
-								PCM_8_KHZ_RATE,
-								 PCM_SAMPLE_SIZE_BITS,
-								 ONE_CHANNEL, 
-								 PCM_FRAME_SIZE_BYTES_MONO,
-								PCM_8_KHZ_RATE,
-								 LITTLE_ENDIAN );
 
-	public static AudioFormat PCM_SIGNED_16_KHZ_16BITS_MONO =
+	public static AudioFormat PCM_SIGNED_8000_HZ_32_BIT_MONO = new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
-			new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
-					PCM_16_KHZ_RATE,
-					PCM_SAMPLE_SIZE_BITS,
-					ONE_CHANNEL,
-					PCM_FRAME_SIZE_BYTES_MONO,
-					PCM_16_KHZ_RATE,
-					LITTLE_ENDIAN );
-
-	public static AudioFormat PCM_SIGNED_22050_HZ_16BITS_MONO =
-			new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
-					PCM_22050_HZ_RATE,
-					PCM_SAMPLE_SIZE_BITS,
-					ONE_CHANNEL,
-					PCM_FRAME_SIZE_BYTES_MONO,
-					PCM_22050_HZ_RATE,
-					LITTLE_ENDIAN );
-
-	public static AudioFormat PCM_SIGNED_44100_HZ_16BITS_MONO =
-			new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
-					PCM_44100_HZ_RATE,
-					PCM_SAMPLE_SIZE_BITS,
-					ONE_CHANNEL,
-					PCM_FRAME_SIZE_BYTES_MONO,
-					PCM_44100_HZ_RATE,
-					LITTLE_ENDIAN );
-
-	public static AudioFormat PCM_SIGNED_8KHZ_16BITS_STEREO =
-			new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
 					PCM_8_KHZ_RATE,
-					PCM_SAMPLE_SIZE_BITS,
+					PCM_SAMPLE_SIZE_32_BITS,
+					ONE_CHANNEL,
+					PCM_FRAME_SIZE_BYTES_32_BIT_MONO,
+					PCM_8_KHZ_RATE,
+					LITTLE_ENDIAN );
+
+	public static AudioFormat PCM_SIGNED_8000_HZ_16_BIT_MONO = new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
+					PCM_8_KHZ_RATE,
+					PCM_SAMPLE_SIZE_16_BITS,
+					ONE_CHANNEL,
+					PCM_FRAME_SIZE_BYTES_16_BIT_MONO,
+					PCM_8_KHZ_RATE,
+					LITTLE_ENDIAN );
+
+	public static AudioFormat PCM_SIGNED_16000_HZ_16_BIT_MONO = new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
+					PCM_16_KHZ_RATE,
+					PCM_SAMPLE_SIZE_16_BITS,
+					ONE_CHANNEL,
+					PCM_FRAME_SIZE_BYTES_16_BIT_MONO,
+					PCM_16_KHZ_RATE,
+					LITTLE_ENDIAN );
+
+	public static AudioFormat PCM_SIGNED_16000_HZ_32_BIT_MONO = new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
+					PCM_16_KHZ_RATE,
+					PCM_SAMPLE_SIZE_32_BITS,
+					ONE_CHANNEL,
+					PCM_FRAME_SIZE_BYTES_32_BIT_MONO,
+					PCM_16_KHZ_RATE,
+					LITTLE_ENDIAN );
+
+	public static AudioFormat PCM_SIGNED_22050_HZ_16_BIT_MONO = new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
+					PCM_22050_HZ_RATE,
+					PCM_SAMPLE_SIZE_16_BITS,
+					ONE_CHANNEL,
+					PCM_FRAME_SIZE_BYTES_16_BIT_MONO,
+					PCM_22050_HZ_RATE,
+					LITTLE_ENDIAN );
+
+	public static AudioFormat PCM_SIGNED_22050_HZ_32_BIT_MONO = new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
+					PCM_22050_HZ_RATE,
+					PCM_SAMPLE_SIZE_32_BITS,
+					ONE_CHANNEL,
+					PCM_FRAME_SIZE_BYTES_32_BIT_MONO,
+					PCM_22050_HZ_RATE,
+					LITTLE_ENDIAN );
+
+	public static AudioFormat PCM_SIGNED_44100_HZ_16_BIT_MONO = new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
+					PCM_44100_HZ_RATE,
+					PCM_SAMPLE_SIZE_16_BITS,
+					ONE_CHANNEL,
+					PCM_FRAME_SIZE_BYTES_16_BIT_MONO,
+					PCM_44100_HZ_RATE,
+					LITTLE_ENDIAN );
+
+	public static AudioFormat PCM_SIGNED_44100_HZ_32_BIT_MONO = new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
+					PCM_44100_HZ_RATE,
+					PCM_SAMPLE_SIZE_32_BITS,
+					ONE_CHANNEL,
+					PCM_FRAME_SIZE_BYTES_32_BIT_MONO,
+					PCM_44100_HZ_RATE,
+					LITTLE_ENDIAN );
+
+	public static AudioFormat PCM_SIGNED_8000_HZ_16BITS_STEREO = new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
+					PCM_8_KHZ_RATE,
+					PCM_SAMPLE_SIZE_16_BITS,
 					TWO_CHANNELS,
-					PCM_FRAME_SIZE_BYTES_STEREO,
+					PCM_FRAME_SIZE_BYTES_16_BIT_STEREO,
 					PCM_8_KHZ_RATE,
 					LITTLE_ENDIAN );
 
-	public static AudioFormat PCM_SIGNED_48KHZ_16BITS_MONO =
-						new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
-								PCM_48_KHZ_RATE,
-								 PCM_SAMPLE_SIZE_BITS,
-								 ONE_CHANNEL, 
-								 PCM_FRAME_SIZE_BYTES_MONO,
-								PCM_48_KHZ_RATE,
-								 LITTLE_ENDIAN );
-	
-	public static AudioFormat PCM_SIGNED_48KHZ_16BITS_STEREO =
-						new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
-								PCM_48_KHZ_RATE,
-								 PCM_SAMPLE_SIZE_BITS,
-								 TWO_CHANNELS, 
-								 PCM_FRAME_SIZE_BYTES_STEREO,
-								PCM_48_KHZ_RATE,
-								 LITTLE_ENDIAN );
-	
 	/**
 	 * Source Data Line Info for a 48 kHz, 16-bits signed PCM one channel
 	 */
 	public static final Line.Info MONO_SOURCE_DATALINE_INFO = 
-		new DataLine.Info( SourceDataLine.class, PCM_SIGNED_8_KHZ_16BITS_MONO);
+		new DataLine.Info( SourceDataLine.class, PCM_SIGNED_8000_HZ_16_BIT_MONO);
 	
 	/**
 	 * Source Data Line Info for a 48 kHz, 16-bits signed PCM two channels
 	 */
 	public static final Line.Info STEREO_SOURCE_DATALINE_INFO = 
-		new DataLine.Info( SourceDataLine.class, PCM_SIGNED_8KHZ_16BITS_STEREO);
+		new DataLine.Info( SourceDataLine.class, PCM_SIGNED_8000_HZ_16BITS_STEREO);
 }

src/main/java/io/github/dsheirer/audio/broadcast/AudioStreamingBroadcaster.java

@@ -18,8 +18,8 @@
  */
 package io.github.dsheirer.audio.broadcast;
 
-import io.github.dsheirer.audio.convert.AudioSampleRate;
 import io.github.dsheirer.audio.convert.ISilenceGenerator;
+import io.github.dsheirer.audio.convert.InputAudioFormat;
 import io.github.dsheirer.audio.convert.MP3Setting;
 import io.github.dsheirer.identifier.IdentifierCollection;
 import io.github.dsheirer.util.ThreadPool;
@@ -73,13 +73,13 @@ public abstract class AudioStreamingBroadcaster<T extends BroadcastConfiguration
      * The last audio packet's metadata is automatically attached to the closed audio recording when it is enqueued for
      * broadcast.  That metadata will be updated on the remote server once the audio recording is opened for streaming.
      */
-    public AudioStreamingBroadcaster(T broadcastConfiguration, AudioSampleRate audioSampleRate, MP3Setting mp3Setting)
+    public AudioStreamingBroadcaster(T broadcastConfiguration, InputAudioFormat inputAudioFormat, MP3Setting mp3Setting)
     {
         super(broadcastConfiguration);
         mDelay = getBroadcastConfiguration().getDelay();
         mMaximumRecordingAge = getBroadcastConfiguration().getMaximumRecordingAge();
         mSilenceGenerator = BroadcastFactory.getSilenceGenerator(broadcastConfiguration.getBroadcastFormat(),
-                audioSampleRate, mp3Setting);
+                inputAudioFormat, mp3Setting);
     }
 
     public void dispose()

src/main/java/io/github/dsheirer/audio/broadcast/BroadcastFactory.java

@@ -30,9 +30,9 @@ import io.github.dsheirer.audio.broadcast.shoutcast.v1.ShoutcastV1AudioBroadcast
 import io.github.dsheirer.audio.broadcast.shoutcast.v1.ShoutcastV1Configuration;
 import io.github.dsheirer.audio.broadcast.shoutcast.v2.ShoutcastV2AudioStreamingBroadcaster;
 import io.github.dsheirer.audio.broadcast.shoutcast.v2.ShoutcastV2Configuration;
-import io.github.dsheirer.audio.convert.AudioSampleRate;
 import io.github.dsheirer.audio.convert.IAudioConverter;
 import io.github.dsheirer.audio.convert.ISilenceGenerator;
+import io.github.dsheirer.audio.convert.InputAudioFormat;
 import io.github.dsheirer.audio.convert.MP3AudioConverter;
 import io.github.dsheirer.audio.convert.MP3Setting;
 import io.github.dsheirer.audio.convert.MP3SilenceGenerator;
@@ -55,29 +55,29 @@ public class BroadcastFactory
     {
         if(configuration != null)
         {
-            AudioSampleRate audioSampleRate = userPreferences.getMP3Preference().getAudioSampleRate();
+            InputAudioFormat inputAudioFormat = userPreferences.getMP3Preference().getAudioSampleRate();
             MP3Setting mp3Setting = userPreferences.getMP3Preference().getMP3Setting();
 
             switch(configuration.getBroadcastServerType())
             {
                 case BROADCASTIFY_CALL:
                     return new BroadcastifyCallBroadcaster((BroadcastifyCallConfiguration)configuration,
-                            audioSampleRate, mp3Setting, aliasModel);
+                            inputAudioFormat, mp3Setting, aliasModel);
                 case BROADCASTIFY:
                     return new IcecastTCPAudioBroadcaster((BroadcastifyFeedConfiguration) configuration,
-                            audioSampleRate, mp3Setting, aliasModel);
+                            inputAudioFormat, mp3Setting, aliasModel);
                 case ICECAST_TCP:
-                    return new IcecastTCPAudioBroadcaster((IcecastTCPConfiguration) configuration, audioSampleRate,
+                    return new IcecastTCPAudioBroadcaster((IcecastTCPConfiguration) configuration, inputAudioFormat,
                             mp3Setting, aliasModel);
                 case ICECAST_HTTP:
-                    return new IcecastHTTPAudioBroadcaster((IcecastHTTPConfiguration) configuration, audioSampleRate,
+                    return new IcecastHTTPAudioBroadcaster((IcecastHTTPConfiguration) configuration, inputAudioFormat,
                             mp3Setting, aliasModel);
                 case SHOUTCAST_V1:
-                    return new ShoutcastV1AudioBroadcaster((ShoutcastV1Configuration) configuration, audioSampleRate,
+                    return new ShoutcastV1AudioBroadcaster((ShoutcastV1Configuration) configuration, inputAudioFormat,
                             mp3Setting, aliasModel);
                 case SHOUTCAST_V2:
                     return new ShoutcastV2AudioStreamingBroadcaster((ShoutcastV2Configuration) configuration,
-                            audioSampleRate, mp3Setting, aliasModel);
+                            inputAudioFormat, mp3Setting, aliasModel);
                 case UNKNOWN:
                 default:
                     mLog.info("Unrecognized broadcastAudio configuration: " + configuration.getBroadcastFormat().name());
@@ -94,13 +94,13 @@ public class BroadcastFactory
      * @param configuration containing the requested output audio format
      * @return audio convert or null
      */
-    public static IAudioConverter getAudioConverter(BroadcastConfiguration configuration, AudioSampleRate audioSampleRate,
+    public static IAudioConverter getAudioConverter(BroadcastConfiguration configuration, InputAudioFormat inputAudioFormat,
                                                     MP3Setting mp3Setting)
     {
         switch(configuration.getBroadcastFormat())
         {
             case MP3:
-                return new MP3AudioConverter(audioSampleRate, mp3Setting);
+                return new MP3AudioConverter(inputAudioFormat, mp3Setting);
             default:
                 mLog.info("Unrecognized broadcastAudio format: " + configuration.getBroadcastFormat().name());
         }
@@ -140,12 +140,12 @@ public class BroadcastFactory
         return null;
     }
 
-    public static ISilenceGenerator getSilenceGenerator(BroadcastFormat format, AudioSampleRate audioSampleRate, MP3Setting mp3Setting)
+    public static ISilenceGenerator getSilenceGenerator(BroadcastFormat format, InputAudioFormat inputAudioFormat, MP3Setting mp3Setting)
     {
         switch(format)
         {
             case MP3:
-                return new MP3SilenceGenerator(audioSampleRate, mp3Setting);
+                return new MP3SilenceGenerator(inputAudioFormat, mp3Setting);
             default:
                 throw new IllegalArgumentException("Unrecognized broadcast format [" + format +
                     "] can't create silence generator");

src/main/java/io/github/dsheirer/audio/broadcast/broadcastify/BroadcastifyCallBroadcaster.java

@@ -25,7 +25,7 @@ import io.github.dsheirer.audio.broadcast.AbstractAudioBroadcaster;
 import io.github.dsheirer.audio.broadcast.AudioRecording;
 import io.github.dsheirer.audio.broadcast.BroadcastEvent;
 import io.github.dsheirer.audio.broadcast.BroadcastState;
-import io.github.dsheirer.audio.convert.AudioSampleRate;
+import io.github.dsheirer.audio.convert.InputAudioFormat;
 import io.github.dsheirer.audio.convert.MP3Setting;
 import io.github.dsheirer.gui.playlist.radioreference.RadioReferenceDecoder;
 import io.github.dsheirer.identifier.Form;
@@ -83,7 +83,7 @@ public class BroadcastifyCallBroadcaster extends AbstractAudioBroadcaster<Broadc
      * @param config to use
      * @param aliasModel for access to aliases
      */
-    public BroadcastifyCallBroadcaster(BroadcastifyCallConfiguration config, AudioSampleRate audioSampleRate,
+    public BroadcastifyCallBroadcaster(BroadcastifyCallConfiguration config, InputAudioFormat inputAudioFormat,
                                        MP3Setting mp3Setting, AliasModel aliasModel)
     {
         super(config);

src/main/java/io/github/dsheirer/audio/broadcast/icecast/IcecastAudioBroadcaster.java

@@ -22,7 +22,7 @@ import io.github.dsheirer.alias.AliasModel;
 import io.github.dsheirer.audio.broadcast.AudioStreamingBroadcaster;
 import io.github.dsheirer.audio.broadcast.BroadcastConfiguration;
 import io.github.dsheirer.audio.broadcast.IBroadcastMetadataUpdater;
-import io.github.dsheirer.audio.convert.AudioSampleRate;
+import io.github.dsheirer.audio.convert.InputAudioFormat;
 import io.github.dsheirer.audio.convert.MP3Setting;
 
 public abstract class IcecastAudioBroadcaster extends AudioStreamingBroadcaster
@@ -30,10 +30,10 @@ public abstract class IcecastAudioBroadcaster extends AudioStreamingBroadcaster
     private IBroadcastMetadataUpdater mMetadataUpdater;
     private AliasModel mAliasModel;
 
-    public IcecastAudioBroadcaster(BroadcastConfiguration broadcastConfiguration, AudioSampleRate audioSampleRate,
+    public IcecastAudioBroadcaster(BroadcastConfiguration broadcastConfiguration, InputAudioFormat inputAudioFormat,
                                    MP3Setting mp3Setting, AliasModel aliasModel)
     {
-        super(broadcastConfiguration, audioSampleRate, mp3Setting);
+        super(broadcastConfiguration, inputAudioFormat, mp3Setting);
         mAliasModel = aliasModel;
     }
 

src/main/java/io/github/dsheirer/audio/broadcast/icecast/IcecastHTTPAudioBroadcaster.java

@@ -20,7 +20,7 @@ package io.github.dsheirer.audio.broadcast.icecast;
 
 import io.github.dsheirer.alias.AliasModel;
 import io.github.dsheirer.audio.broadcast.BroadcastState;
-import io.github.dsheirer.audio.convert.AudioSampleRate;
+import io.github.dsheirer.audio.convert.InputAudioFormat;
 import io.github.dsheirer.audio.convert.MP3AudioConverter;
 import io.github.dsheirer.audio.convert.MP3Setting;
 import io.github.dsheirer.properties.SystemProperties;
@@ -70,10 +70,10 @@ public class IcecastHTTPAudioBroadcaster extends IcecastAudioBroadcaster
      *
      * @param configuration for the Icecast stream
      */
-    public IcecastHTTPAudioBroadcaster(IcecastHTTPConfiguration configuration, AudioSampleRate audioSampleRate,
+    public IcecastHTTPAudioBroadcaster(IcecastHTTPConfiguration configuration, InputAudioFormat inputAudioFormat,
                                        MP3Setting mp3Setting, AliasModel aliasModel)
     {
-        super(configuration, audioSampleRate, mp3Setting, aliasModel);
+        super(configuration, inputAudioFormat, mp3Setting, aliasModel);
     }
 
     /**

src/main/java/io/github/dsheirer/audio/broadcast/icecast/IcecastTCPAudioBroadcaster.java

@@ -21,7 +21,7 @@ package io.github.dsheirer.audio.broadcast.icecast;
 import io.github.dsheirer.alias.AliasModel;
 import io.github.dsheirer.audio.broadcast.BroadcastState;
 import io.github.dsheirer.audio.broadcast.icecast.codec.IcecastCodecFactory;
-import io.github.dsheirer.audio.convert.AudioSampleRate;
+import io.github.dsheirer.audio.convert.InputAudioFormat;
 import io.github.dsheirer.audio.convert.MP3AudioConverter;
 import io.github.dsheirer.audio.convert.MP3Setting;
 import io.github.dsheirer.properties.SystemProperties;
@@ -68,10 +68,10 @@ public class IcecastTCPAudioBroadcaster extends IcecastAudioBroadcaster
      *
      * @param configuration for the Icecast stream
      */
-    public IcecastTCPAudioBroadcaster(IcecastTCPConfiguration configuration, AudioSampleRate audioSampleRate,
+    public IcecastTCPAudioBroadcaster(IcecastTCPConfiguration configuration, InputAudioFormat inputAudioFormat,
                                       MP3Setting mp3Setting, AliasModel aliasModel)
     {
-        super(configuration, audioSampleRate, mp3Setting, aliasModel);
+        super(configuration, inputAudioFormat, mp3Setting, aliasModel);
     }
 
     /**

src/main/java/io/github/dsheirer/audio/broadcast/shoutcast/v1/ShoutcastV1AudioBroadcaster.java

@@ -22,7 +22,7 @@ import io.github.dsheirer.alias.AliasModel;
 import io.github.dsheirer.audio.broadcast.AudioStreamingBroadcaster;
 import io.github.dsheirer.audio.broadcast.BroadcastState;
 import io.github.dsheirer.audio.broadcast.IBroadcastMetadataUpdater;
-import io.github.dsheirer.audio.convert.AudioSampleRate;
+import io.github.dsheirer.audio.convert.InputAudioFormat;
 import io.github.dsheirer.audio.convert.MP3Setting;
 import io.github.dsheirer.util.ThreadPool;
 import org.apache.mina.core.RuntimeIoException;
@@ -63,10 +63,10 @@ public class ShoutcastV1AudioBroadcaster extends AudioStreamingBroadcaster
      *
      * @param configuration for the Shoutcast stream
      */
-    public ShoutcastV1AudioBroadcaster(ShoutcastV1Configuration configuration, AudioSampleRate audioSampleRate,
+    public ShoutcastV1AudioBroadcaster(ShoutcastV1Configuration configuration, InputAudioFormat inputAudioFormat,
                                        MP3Setting mp3Setting, AliasModel aliasModel)
     {
-        super(configuration, audioSampleRate, mp3Setting);
+        super(configuration, inputAudioFormat, mp3Setting);
         mAliasModel = aliasModel;
     }
 

src/main/java/io/github/dsheirer/audio/broadcast/shoutcast/v2/ShoutcastV2AudioStreamingBroadcaster.java

@@ -40,7 +40,7 @@ import io.github.dsheirer.audio.broadcast.shoutcast.v2.ultravox.UltravoxMessageF
 import io.github.dsheirer.audio.broadcast.shoutcast.v2.ultravox.UltravoxMessageType;
 import io.github.dsheirer.audio.broadcast.shoutcast.v2.ultravox.UltravoxMetadata;
 import io.github.dsheirer.audio.broadcast.shoutcast.v2.ultravox.UltravoxProtocolFactory;
-import io.github.dsheirer.audio.convert.AudioSampleRate;
+import io.github.dsheirer.audio.convert.InputAudioFormat;
 import io.github.dsheirer.audio.convert.MP3Setting;
 import io.github.dsheirer.identifier.Form;
 import io.github.dsheirer.identifier.Identifier;
@@ -93,10 +93,10 @@ public class ShoutcastV2AudioStreamingBroadcaster extends AudioStreamingBroadcas
      *
      * @param configuration for the Shoutcast V2 stream
      */
-    public ShoutcastV2AudioStreamingBroadcaster(ShoutcastV2Configuration configuration, AudioSampleRate audioSampleRate,
+    public ShoutcastV2AudioStreamingBroadcaster(ShoutcastV2Configuration configuration, InputAudioFormat inputAudioFormat,
                                                 MP3Setting mp3Setting, AliasModel aliasModel)
     {
-        super(configuration, audioSampleRate, mp3Setting);
+        super(configuration, inputAudioFormat, mp3Setting);
         mAliasModel = aliasModel;
     }
 

src/main/java/io/github/dsheirer/audio/convert/InputAudioFormat.java

@@ -24,14 +24,19 @@ import io.github.dsheirer.audio.AudioFormats;
 import javax.sound.sampled.AudioFormat;
 
 /**
- * Enumeration of (input) audio sample rates for mono audio.
+ * Enumeration of MP3 input audio formats for mono audio.
  */
-public enum AudioSampleRate
+public enum InputAudioFormat
 {
-    SR_8000(AudioFormats.PCM_SIGNED_8_KHZ_16BITS_MONO, "8000 Hz (no resample / default)"),
+    SR_8000(AudioFormats.PCM_SIGNED_8000_HZ_16_BIT_MONO, "16-Bit 8000 Hz (no resample)"),
-    SR_16000(AudioFormats.PCM_SIGNED_16_KHZ_16BITS_MONO, "16000 Hz"),
+    SR_16000(AudioFormats.PCM_SIGNED_16000_HZ_16_BIT_MONO, "16-Bit 16000 Hz"),
-    SR_22050(AudioFormats.PCM_SIGNED_22050_HZ_16BITS_MONO, "22050 Hz"),
+    SR_22050(AudioFormats.PCM_SIGNED_22050_HZ_16_BIT_MONO, "16-Bit 22050 Hz (default)"),
-    SR_44100(AudioFormats.PCM_SIGNED_44100_HZ_16BITS_MONO, "44100 Hz");
+    SR_44100(AudioFormats.PCM_SIGNED_44100_HZ_16_BIT_MONO, "16-Bit 44100 Hz"),
+
+    SR_32_8000(AudioFormats.PCM_SIGNED_8000_HZ_32_BIT_MONO, "32-Bit 8000 Hz (no resample)"),
+    SR_32_16000(AudioFormats.PCM_SIGNED_16000_HZ_32_BIT_MONO, "32-Bit 16000 Hz"),
+    SR_32_22050(AudioFormats.PCM_SIGNED_22050_HZ_32_BIT_MONO, "32-Bit 22050 Hz"),
+    SR_32_44100(AudioFormats.PCM_SIGNED_44100_HZ_32_BIT_MONO, "32-Bit 44100 Hz");
 
     private AudioFormat mAudioFormat;
     private String mLabel;
@@ -40,7 +45,7 @@ public enum AudioSampleRate
      * Constructs an instance
      * @param audioFormat for the specified sample rate
      */
-    AudioSampleRate(AudioFormat audioFormat, String label)
+    InputAudioFormat(AudioFormat audioFormat, String label)
     {
         mAudioFormat = audioFormat;
         mLabel = label;
@@ -49,9 +54,9 @@ public enum AudioSampleRate
     /**
      * Default sample rate
      */
-    public static AudioSampleRate getDefault()
+    public static InputAudioFormat getDefault()
     {
-        return SR_8000;
+        return SR_22050;
     }
 
     /**

src/main/java/io/github/dsheirer/audio/convert/LameFactory.java

@@ -34,7 +34,7 @@ public class LameFactory
      * @param setting to apply to the encoder
      * @return lame encoder
      */
-    public static LameEncoder getLameEncoder(AudioSampleRate input, MP3Setting setting)
+    public static LameEncoder getLameEncoder(InputAudioFormat input, MP3Setting setting)
     {
         return switch(setting)
         {
@@ -52,13 +52,13 @@ public class LameFactory
      * @param sampleRate to resample to
      * @return resampler.
      */
-    public static RealResampler getResampler(AudioSampleRate sampleRate)
+    public static RealResampler getResampler(InputAudioFormat sampleRate)
     {
         return switch(sampleRate)
         {
-            case SR_16000 -> new RealResampler(8000, 16000, 4096, 512);
+            case SR_16000, SR_32_16000 -> new RealResampler(8000, 16000, 4096, 512);
-            case SR_22050 -> new RealResampler(8000, 22050, 4096, 512);
+            case SR_22050, SR_32_22050 -> new RealResampler(8000, 22050, 4096, 512);
-            case SR_44100 -> new RealResampler(8000, 44100, 4096, 512);
+            case SR_44100, SR_32_44100 -> new RealResampler(8000, 44100, 4096, 512);
             default -> throw new IllegalArgumentException("Unrecognized sample rate for resampling: " + sampleRate);
         };
     }

src/main/java/io/github/dsheirer/audio/convert/MP3AudioConverter.java

@@ -32,6 +32,9 @@ import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
+/**
+ * Converts PCM audio packets to Mono, MP3 encoded audio
+ */
 public class MP3AudioConverter implements IAudioConverter
 {
     private final static Logger mLog = LoggerFactory.getLogger( MP3AudioConverter.class );
@@ -40,25 +43,33 @@ public class MP3AudioConverter implements IAudioConverter
     private RealResampler mResampler;
     private ByteArrayOutputStream mMP3EncodedFramesStream = new ByteArrayOutputStream();
     private byte[] mOutputFramesBuffer;
+    private InputAudioFormat mInputAudioFormat;
 
     /**
-     * Converts PCM 16-bit Little Endian audio packets to Mono, MP3 compressed audio.
+     * Constructs an instance.
      *
-     * @param audioSampleRate for the desired input sample rate (resampled from default 8 kHz as needed)
+     * @param inputAudioFormat for the desired input sample rate and bit size (resampled from default 8 kHz as needed)
      * @param setting to configure the LAME encoder
      */
-    public MP3AudioConverter(AudioSampleRate audioSampleRate, MP3Setting setting)
+    public MP3AudioConverter(InputAudioFormat inputAudioFormat, MP3Setting setting)
     {
-        mEncoder = LameFactory.getLameEncoder(audioSampleRate, setting);
+        mInputAudioFormat = inputAudioFormat;
+        mEncoder = LameFactory.getLameEncoder(inputAudioFormat, setting);
 
-        if(audioSampleRate != AudioSampleRate.SR_8000)
+        //Resampling is only required if desired input sample rate is not system default of 8kHz
+        if(inputAudioFormat != InputAudioFormat.SR_8000 && inputAudioFormat != InputAudioFormat.SR_32_8000)
         {
-            mResampler = LameFactory.getResampler(audioSampleRate);
+            mResampler = LameFactory.getResampler(inputAudioFormat);
         }
 
         mOutputFramesBuffer = new byte[mEncoder.getPCMBufferSize()];
     }
 
+    /**
+     * Converts the list of PCM audio packets to MP3 encoded.
+     * @param audioPackets of PCM audio sampled at 8 kHz
+     * @return encoded MP3 audio
+     */
     public List<byte[]> convert(List<float[]> audioPackets)
     {
         List<byte[]> converted = new ArrayList<>();
@@ -70,7 +81,17 @@ public class MP3AudioConverter implements IAudioConverter
 
         for(int x = 0; x < audioPackets.size(); x++)
         {
-            byte[] bytesToEncode = ConversionUtils.convertToSigned16BitSamples(audioPackets.get(x)).array();
+            byte[] bytesToEncode = null;
+
+            if(mInputAudioFormat.getAudioFormat().getSampleSizeInBits() == 16)
+            {
+                bytesToEncode = ConversionUtils.convertToSigned16BitSamples(audioPackets.get(x)).array();
+            }
+            else
+            {
+                bytesToEncode = ConversionUtils.convertToSigned32BitSamples(audioPackets.get(x)).array();
+            }
+
             int bytesToEncodePointer = 0;
 
             int inputChunkSize = FastMath.min(mOutputFramesBuffer.length, bytesToEncode.length);

src/main/java/io/github/dsheirer/audio/convert/MP3FrameInspector.java

@@ -58,7 +58,7 @@ public class MP3FrameInspector
     public static void main(String[] args)
     {
         mLog.info("Starting ...");
-        MP3SilenceGenerator gen = new MP3SilenceGenerator(AudioSampleRate.SR_8000, MP3Setting.getDefault());
+        MP3SilenceGenerator gen = new MP3SilenceGenerator(InputAudioFormat.SR_8000, MP3Setting.getDefault());
 
         List<byte[]> audio = gen.generate(173);
 

src/main/java/io/github/dsheirer/audio/convert/MP3SilenceGenerator.java

@@ -31,16 +31,16 @@ public class MP3SilenceGenerator implements ISilenceGenerator
     public static final boolean CONSTANT_BIT_RATE = false;
 
     private MP3AudioConverter mMP3AudioConverter;
-    private AudioSampleRate mAudioSampleRate;
+    private InputAudioFormat mInputAudioFormat;
     private byte[] mPreviousPartialFrameData;
 
     /**
      * Generates MP3 audio silence frames
      */
-    public MP3SilenceGenerator(AudioSampleRate audioSampleRate, MP3Setting setting)
+    public MP3SilenceGenerator(InputAudioFormat inputAudioFormat, MP3Setting setting)
     {
-        mAudioSampleRate = audioSampleRate;
+        mInputAudioFormat = inputAudioFormat;
-        mMP3AudioConverter = new MP3AudioConverter(audioSampleRate, setting);
+        mMP3AudioConverter = new MP3AudioConverter(inputAudioFormat, setting);
     }
 
     /**
@@ -53,7 +53,7 @@ public class MP3SilenceGenerator implements ISilenceGenerator
         double duration_secs = (double)duration_ms / 1000.0;
 
         //We generate silence at 8000 kHz, because it gets resampled by the silence generator to the target rate
-        int length = (int)(duration_secs * AudioSampleRate.SR_8000.getSampleRate());
+        int length = (int)(duration_secs * InputAudioFormat.SR_8000.getSampleRate());
 
         List<float[]> silenceBuffers = new ArrayList<>();
 
@@ -94,7 +94,7 @@ public class MP3SilenceGenerator implements ISilenceGenerator
     {
         mLog.debug("Starting ...");
 
-        MP3SilenceGenerator generator = new MP3SilenceGenerator(AudioSampleRate.SR_44100, MP3Setting.VBR_7);
+        MP3SilenceGenerator generator = new MP3SilenceGenerator(InputAudioFormat.SR_44100, MP3Setting.VBR_7);
 
         int x = 100;
 

src/main/java/io/github/dsheirer/audio/playback/MonoAudioOutput.java

@@ -36,7 +36,7 @@ public class MonoAudioOutput extends AudioOutput
 
     public MonoAudioOutput(Mixer mixer, UserPreferences userPreferences)
     {
-        super(mixer, MixerChannel.MONO, AudioFormats.PCM_SIGNED_8_KHZ_16BITS_MONO,
+        super(mixer, MixerChannel.MONO, AudioFormats.PCM_SIGNED_8000_HZ_16_BIT_MONO,
             AudioFormats.MONO_SOURCE_DATALINE_INFO, BUFFER_SIZE, userPreferences);
     }
 

src/main/java/io/github/dsheirer/audio/playback/StereoAudioOutput.java

@@ -1,6 +1,6 @@
-/*******************************************************************************
+/*
- * sdrtrunk
+ * *****************************************************************************
- * Copyright (C) 2014-2017 Dennis Sheirer
+ * Copyright (C) 2014-2022 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -14,8 +14,8 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
- *
+ * ****************************************************************************
- ******************************************************************************/
+ */
 package io.github.dsheirer.audio.playback;
 
 import io.github.dsheirer.audio.AudioFormats;
@@ -36,7 +36,7 @@ public class StereoAudioOutput extends AudioOutput
 
     public StereoAudioOutput(Mixer mixer, MixerChannel channel, UserPreferences userPreferences)
     {
-        super(mixer, channel, AudioFormats.PCM_SIGNED_8KHZ_16BITS_STEREO, AudioFormats.STEREO_SOURCE_DATALINE_INFO,
+        super(mixer, channel, AudioFormats.PCM_SIGNED_8000_HZ_16BITS_STEREO, AudioFormats.STEREO_SOURCE_DATALINE_INFO,
             BUFFER_SIZE, userPreferences);
     }
 

src/main/java/io/github/dsheirer/gui/preference/mp3/MP3PreferenceEditor.java

@@ -19,7 +19,7 @@
 
 package io.github.dsheirer.gui.preference.mp3;
 
-import io.github.dsheirer.audio.convert.AudioSampleRate;
+import io.github.dsheirer.audio.convert.InputAudioFormat;
 import io.github.dsheirer.audio.convert.MP3Setting;
 import io.github.dsheirer.preference.UserPreferences;
 import io.github.dsheirer.preference.mp3.MP3Preference;
@@ -43,7 +43,7 @@ public class MP3PreferenceEditor extends HBox
     private MP3Preference mMP3Preference;
     private GridPane mEditorPane;
     private ComboBox<MP3Setting> mMP3SettingComboBox;
-    private ComboBox<AudioSampleRate> mAudioSampleRateComboBox;
+    private ComboBox<InputAudioFormat> mAudioSampleRateComboBox;
 
     public MP3PreferenceEditor(UserPreferences userPreferences)
     {
@@ -96,12 +96,12 @@ public class MP3PreferenceEditor extends HBox
         return mMP3SettingComboBox;
     }
 
-    private ComboBox<AudioSampleRate> getAudioSampleRateComboBox()
+    private ComboBox<InputAudioFormat> getAudioSampleRateComboBox()
     {
         if(mAudioSampleRateComboBox == null)
         {
             mAudioSampleRateComboBox = new ComboBox<>();
-            mAudioSampleRateComboBox.getItems().addAll(AudioSampleRate.values());
+            mAudioSampleRateComboBox.getItems().addAll(InputAudioFormat.values());
             mAudioSampleRateComboBox.getSelectionModel().select(mMP3Preference.getAudioSampleRate());
             mAudioSampleRateComboBox.getSelectionModel().selectedItemProperty()
                     .addListener((observable, oldValue, newValue) -> mMP3Preference.setAudioSampleRate(newValue));

src/main/java/io/github/dsheirer/gui/preference/playback/PlaybackPreferenceEditor.java

@@ -407,7 +407,7 @@ public class PlaybackPreferenceEditor extends HBox
 
             byte[] bytes = buffer.array();
 
-            DataLine.Info info = new DataLine.Info(Clip.class, AudioFormats.PCM_SIGNED_8_KHZ_16BITS_MONO);
+            DataLine.Info info = new DataLine.Info(Clip.class, AudioFormats.PCM_SIGNED_8000_HZ_16_BIT_MONO);
 
             if(!AudioSystem.isLineSupported(info))
             {
@@ -418,7 +418,7 @@ public class PlaybackPreferenceEditor extends HBox
             try
             {
                 Clip clip = (Clip)AudioSystem.getLine(info);
-                clip.open(AudioFormats.PCM_SIGNED_8_KHZ_16BITS_MONO, bytes, 0, bytes.length);
+                clip.open(AudioFormats.PCM_SIGNED_8000_HZ_16_BIT_MONO, bytes, 0, bytes.length);
                 clip.start();
             }
             catch(Exception e)

src/main/java/io/github/dsheirer/preference/mp3/MP3Preference.java

@@ -19,7 +19,7 @@
 
 package io.github.dsheirer.preference.mp3;
 
-import io.github.dsheirer.audio.convert.AudioSampleRate;
+import io.github.dsheirer.audio.convert.InputAudioFormat;
 import io.github.dsheirer.audio.convert.MP3Setting;
 import io.github.dsheirer.preference.Preference;
 import io.github.dsheirer.preference.PreferenceType;
@@ -38,7 +38,7 @@ public class MP3Preference extends Preference
     private static final String PREFERENCE_KEY_AUDIO_MP3_SAMPLE_RATE = "audio.mp3.sample.rate";
     private final static Logger mLog = LoggerFactory.getLogger(MP3Preference.class);
     private Preferences mPreferences = Preferences.userNodeForPackage(MP3Preference.class);
-    private AudioSampleRate mAudioSampleRate;
+    private InputAudioFormat mInputAudioFormat;
     private MP3Setting mMP3Setting;
 
     /**
@@ -96,36 +96,36 @@ public class MP3Preference extends Preference
     /**
      * Preferred audio sample rate for input to the LAME MP3 encoder
      */
-    public AudioSampleRate getAudioSampleRate()
+    public InputAudioFormat getAudioSampleRate()
     {
-        if(mAudioSampleRate == null)
+        if(mInputAudioFormat == null)
         {
             try
             {
-                String rate = mPreferences.get(PREFERENCE_KEY_AUDIO_MP3_SAMPLE_RATE, AudioSampleRate.getDefault().name());
+                String rate = mPreferences.get(PREFERENCE_KEY_AUDIO_MP3_SAMPLE_RATE, InputAudioFormat.getDefault().name());
-                mAudioSampleRate = AudioSampleRate.valueOf(rate);
+                mInputAudioFormat = InputAudioFormat.valueOf(rate);
             }
             catch(Exception e)
             {
                 mLog.error("Error parsing mp3 setting preference", e);
             }
 
-            if(mAudioSampleRate == null)
+            if(mInputAudioFormat == null)
             {
-                mAudioSampleRate = AudioSampleRate.getDefault();
+                mInputAudioFormat = InputAudioFormat.getDefault();
             }
         }
 
-        return mAudioSampleRate;
+        return mInputAudioFormat;
     }
 
     /**
      * Sets the input Audio Sample Rate preference
      */
-    public void setAudioSampleRate(AudioSampleRate audioSampleRate)
+    public void setAudioSampleRate(InputAudioFormat inputAudioFormat)
     {
-        mAudioSampleRate = audioSampleRate;
+        mInputAudioFormat = inputAudioFormat;
-        mPreferences.put(PREFERENCE_KEY_AUDIO_MP3_SAMPLE_RATE, mAudioSampleRate.name());
+        mPreferences.put(PREFERENCE_KEY_AUDIO_MP3_SAMPLE_RATE, mInputAudioFormat.name());
         notifyPreferenceUpdated();
     }
 }

src/main/java/io/github/dsheirer/record/AudioSegmentRecorder.java

@@ -21,7 +21,7 @@ package io.github.dsheirer.record;
 
 import io.github.dsheirer.audio.AudioFormats;
 import io.github.dsheirer.audio.AudioSegment;
-import io.github.dsheirer.audio.convert.AudioSampleRate;
+import io.github.dsheirer.audio.convert.InputAudioFormat;
 import io.github.dsheirer.audio.convert.MP3AudioConverter;
 import io.github.dsheirer.audio.convert.MP3Setting;
 import io.github.dsheirer.preference.UserPreferences;
@@ -93,10 +93,10 @@ public class AudioSegmentRecorder
             outputStream.write(id3Bytes);
 
             //Convert audio to MP3 and write to file
-            AudioSampleRate audioSampleRate = userPreferences.getMP3Preference().getAudioSampleRate();
+            InputAudioFormat inputAudioFormat = userPreferences.getMP3Preference().getAudioSampleRate();
             MP3Setting mp3Setting = userPreferences.getMP3Preference().getMP3Setting();
 
-            MP3AudioConverter converter = new MP3AudioConverter(audioSampleRate, mp3Setting);
+            MP3AudioConverter converter = new MP3AudioConverter(inputAudioFormat, mp3Setting);
             List<byte[]> mp3Frames = converter.convert(audioSegment.getAudioBuffers());
             for(byte[] mp3Frame: mp3Frames)
             {
@@ -128,7 +128,7 @@ public class AudioSegmentRecorder
     {
         if(audioSegment.hasAudio())
         {
-            WaveWriter writer = new WaveWriter(AudioFormats.PCM_SIGNED_8_KHZ_16BITS_MONO, path);
+            WaveWriter writer = new WaveWriter(AudioFormats.PCM_SIGNED_8000_HZ_16_BIT_MONO, path);
 
             for(float[] audioBuffer: audioSegment.getAudioBuffers())
             {

src/main/java/io/github/dsheirer/sample/ConversionUtils.java

@@ -66,7 +66,48 @@ public class ConversionUtils
 
         for(float sample : samples)
         {
-            converted.putShort((short)(sample * Short.MAX_VALUE));
+            if(sample > 1.0f)
+            {
+                converted.putShort(Short.MAX_VALUE);
+            }
+            else if(sample < -1.0f)
+            {
+                converted.putShort((short)-Short.MAX_VALUE);
+            }
+            else
+            {
+                converted.putShort((short)(sample * Short.MAX_VALUE));
+            }
+        }
+
+        return converted;
+    }
+
+    /**
+     * Converts the float samples into a little-endian 32-bit sample byte buffer.
+     *
+     * @param samples - float array of sample data
+     * @return - little-endian 32-bit sample byte buffer
+     */
+    public static ByteBuffer convertToSigned32BitSamples(float[] samples)
+    {
+        ByteBuffer converted = ByteBuffer.allocate(samples.length * 4);
+        converted.order(ByteOrder.LITTLE_ENDIAN);
+
+        for(float sample : samples)
+        {
+            if(sample > 1.0f)
+            {
+                converted.putInt(Integer.MAX_VALUE);
+            }
+            else if(sample < -1.0f)
+            {
+                converted.putInt(-Integer.MAX_VALUE);
+            }
+            else
+            {
+                converted.putInt((int)(sample * Integer.MAX_VALUE));
+            }
         }
 
         return converted;

src/main/java/io/github/dsheirer/source/mixer/MixerManager.java

@@ -76,7 +76,7 @@ public class MixerManager
                         if(channel == MixerChannel.MONO)
                         {
                             DataLine.Info info = new DataLine.Info(TargetDataLine.class,
-                                AudioFormats.PCM_SIGNED_8_KHZ_16BITS_MONO);
+                                AudioFormats.PCM_SIGNED_8000_HZ_16_BIT_MONO);
 
                             TargetDataLine dataLine;
 
@@ -86,7 +86,7 @@ public class MixerManager
 
                                 if(dataLine != null)
                                 {
-                                    return new RealMixerSource(dataLine, AudioFormats.PCM_SIGNED_8_KHZ_16BITS_MONO,
+                                    return new RealMixerSource(dataLine, AudioFormats.PCM_SIGNED_8000_HZ_16_BIT_MONO,
                                         new RealShortAdapter());
                                 }
                             }
@@ -100,7 +100,7 @@ public class MixerManager
                         else //STEREO
                         {
                             DataLine.Info info = new DataLine.Info(TargetDataLine.class,
-                                    AudioFormats.PCM_SIGNED_8KHZ_16BITS_STEREO);
+                                    AudioFormats.PCM_SIGNED_8000_HZ_16BITS_STEREO);
 
                             TargetDataLine dataLine;
 
@@ -110,7 +110,7 @@ public class MixerManager
 
                                 if(dataLine != null)
                                 {
-                                    return new RealMixerSource(dataLine, AudioFormats.PCM_SIGNED_8KHZ_16BITS_STEREO,
+                                    return new RealMixerSource(dataLine, AudioFormats.PCM_SIGNED_8000_HZ_16BITS_STEREO,
                                         new RealChannelShortAdapter(mixerConfig.getChannel()));
                                 }
                             }
@@ -302,12 +302,12 @@ public class MixerManager
     private static EnumSet<MixerChannel> getSupportedTargetChannels(Mixer mixer)
     {
         DataLine.Info stereoInfo = new DataLine.Info(TargetDataLine.class,
-                AudioFormats.PCM_SIGNED_8KHZ_16BITS_STEREO);
+                AudioFormats.PCM_SIGNED_8000_HZ_16BITS_STEREO);
 
         boolean stereoSupported = mixer.isLineSupported(stereoInfo);
 
         DataLine.Info monoInfo = new DataLine.Info(TargetDataLine.class,
-                AudioFormats.PCM_SIGNED_8_KHZ_16BITS_MONO);
+                AudioFormats.PCM_SIGNED_8000_HZ_16_BIT_MONO);
 
         boolean monoSupported = mixer.isLineSupported(monoInfo);
 
@@ -337,11 +337,11 @@ public class MixerManager
         List<MixerChannel> channels = new ArrayList<>();
 
         DataLine.Info stereoInfo = new DataLine.Info(SourceDataLine.class,
-                AudioFormats.PCM_SIGNED_8KHZ_16BITS_STEREO);
+                AudioFormats.PCM_SIGNED_8000_HZ_16BITS_STEREO);
 
         boolean stereoSupported = mixer.isLineSupported(stereoInfo);
 
-        DataLine.Info monoInfo = new DataLine.Info(SourceDataLine.class, AudioFormats.PCM_SIGNED_8_KHZ_16BITS_MONO);
+        DataLine.Info monoInfo = new DataLine.Info(SourceDataLine.class, AudioFormats.PCM_SIGNED_8000_HZ_16_BIT_MONO);
 
         boolean monoSupported = mixer.isLineSupported(monoInfo);