Resolves issue #23.

Adds audio output display and management options supporting mono and 
stereo output options.

Provides audio output supporting prioritization by talkgroup and/or 
channel selection.

Supports muting all channels, or muting individual channels and
individual audio gain/volume controls.

src/module/decode/DecoderFactory.java

@@ -135,10 +135,11 @@ public class DecoderFactory
 										   AuxDecodeConfiguration auxConfig, 
 										   AliasList aliasList,
 										   System system,
-										   Site site )
+										   Site site,
+										   String channelName )
 		{
 		List<Module> modules = getPrimaryModules( channelType, decodeConfig, 
-				recordConfig, aliasList, system, site, resourceManager );
+			recordConfig, aliasList, system, site, channelName, resourceManager );
 		
 		modules.addAll( getAuxiliaryDecoders( auxConfig, aliasList ) );
 		
@@ -176,6 +177,7 @@ public class DecoderFactory
 												  AliasList aliasList,
 												  System system,
 												  Site site,
+												  String channelName,
 												  ResourceManager resourceManager )
 	{
 		List<Module> modules = new ArrayList<Module>();
@@ -191,12 +193,12 @@ public class DecoderFactory
 		{
 		    case AM:
 		    	modules.add( new AMDecoder( decodeConfig ) );
-		    	modules.add( new AlwaysUnsquelchedDecoderState( DecoderType.AM ) );
+		    	modules.add( new AlwaysUnsquelchedDecoderState( DecoderType.AM, channelName ) );
 		        break;
 			case NBFM:
 				modules.add( new AudioModule( recordAudio, NO_REMOVE_DC ) );
 				modules.add( new NBFMDecoder( decodeConfig ) );
-		    	modules.add( new AlwaysUnsquelchedDecoderState( DecoderType.NBFM ) );
+		    	modules.add( new AlwaysUnsquelchedDecoderState( DecoderType.NBFM, channelName ) );
 				modules.add( getFMDemodulator( decodeConfig, pass, stop, REMOVE_DC ) );
 				break;
 			case LTR_STANDARD:

src/module/decode/mpt1327/MPT1327DecoderState.java

@@ -180,7 +180,7 @@ public class MPT1327DecoderState extends DecoderState
 						}
 						mSite = mpt.getSiteID();
 						
-						broadcast( new DecoderStateEvent( this, Event.CONTINUATION, State.CONTROL ) );
+						broadcast( new DecoderStateEvent( this, Event.START, State.CONTROL ) );
 						break;
 					case GTC:
 						String from = mpt.getFromID();

src/module/decode/p25/audio/P25AudioModule.java

@@ -133,29 +133,37 @@ public class P25AudioModule extends Module implements Listener<Message>,
 			Class temp = Class.forName( "jmbe.JMBEAudioLibrary" );
 			
 			library = (AudioConversionLibrary)temp.newInstance();
-
-			mAudioConverter = library.getAudioConverter( IMBE_CODEC, 
-					AudioFormats.PCM_SIGNED_48KHZ_16BITS );
 			
-			if( mAudioConverter != null )
+			if( ( library.getMajorVersion() == 0 && library.getMinorVersion() >= 3 ) ||
+				  library.getMajorVersion() > 0 )
 			{
-				mCanConvertAudio = true;
+				mAudioConverter = library.getAudioConverter( IMBE_CODEC, 
+						AudioFormats.PCM_SIGNED_48KHZ_16BITS_MONO );
 				
-				if( !mLibraryLoadStatusLogged )
+				if( mAudioConverter != null )
 				{
-					mLog.info( "JMBE audio conversion library successfully loaded"
-							+ " - P25 audio will be available" );
+					mCanConvertAudio = true;
 					
-					mLibraryLoadStatusLogged = true;
+					if( !mLibraryLoadStatusLogged )
+					{
+						mLog.info( "JMBE audio conversion library successfully loaded"
+								+ " - P25 audio will be available" );
+						
+						mLibraryLoadStatusLogged = true;
+					}
+				}
+				else
+				{
+					if( !mLibraryLoadStatusLogged )
+					{
+						mLog.info( "JMBE audio conversion library NOT FOUND" );
+						mLibraryLoadStatusLogged = true;
+					}
 				}
 			}
 			else
 			{
-				if( !mLibraryLoadStatusLogged )
-				{
-					mLog.info( "JMBE audio conversion library NOT FOUND" );
-					mLibraryLoadStatusLogged = true;
-				}
+				mLog.debug( "JMBE library version 0.3.x or higher is required" );
 			}
 		} 
 		catch ( ClassNotFoundException e1 )

src/module/decode/state/AlwaysUnsquelchedDecoderState.java

@@ -24,6 +24,9 @@ import module.decode.state.DecoderStateEvent.Event;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import audio.metadata.Metadata;
+import audio.metadata.MetadataType;
+
 /**
  * Basic decoder channel state - provides the minimum channel state functionality
  * to support an always un-squelched audio decoder.
@@ -34,12 +37,14 @@ public class AlwaysUnsquelchedDecoderState extends DecoderState
 			LoggerFactory.getLogger( AlwaysUnsquelchedDecoderState.class );
 	
 	private DecoderType mDecoderType;
+	private String mChannelName;
 	
-	public AlwaysUnsquelchedDecoderState( DecoderType decoderType )
+	public AlwaysUnsquelchedDecoderState( DecoderType decoderType, String channelName )
 	{
 		super( null );
 		
 		mDecoderType = decoderType;
+		mChannelName = channelName;
 	}
 	
 	@Override
@@ -87,6 +92,7 @@ public class AlwaysUnsquelchedDecoderState extends DecoderState
 	@Override
 	public void start()
 	{
+		broadcast( new Metadata( MetadataType.TO, mChannelName, false ) );
 		broadcast( new DecoderStateEvent( this, Event.ALWAYS_UNSQUELCH, State.IDLE ) );
 	}