{MusicMo1.inc by Kari Lammassaari 1996 contains following
 independent and standalone procedures and functions:

 (REMOVE Procedures/Functions You don't need or make them separate inc-files.)

- Procedure WriteAudioRegister(Register,Value:Byte);  
  (Stands alone !)

- Function ReadAudioRegister(Register:Byte):Byte;
  (Stands alone !)

- Function MusicModuleExists:Boolean; 
  (Needs Write/ReadAudioRegister)

- Procedure WriteAudioRam(StartAddr,SourceAddr,Bytecount:Integer);
  (Stands alone !)

- Procedure ReadAudioRam(StartAddr,DestinationAddr,Bytecount:Integer);
  (Stands alone !)
  (REM StartAddr refers to 4 byte groups, NOT sequential bytes in AUDIO RAM.
   Ie. You can set starting point of write/read in audio ram in 4 byte steps,
   ie. StartAddr = refers byte 0 in audio ram, AudioArrd=1 refers byte 4 ...
   Writing/reading occurs ,of course, to every byte. 
   SourceAddr and DestinationAddr refer to data areas in conventional RAM.)

- Function AudioRamSize:Integer;
   (Needs Write/ReadAudioRam.)
   (Returns the size of AudioRam in kilobytes ie. 32 or 256 .)
   (Updates variable SizeOfAudioRam :Real)

- Procedure Sample(StartAddr,SampleLenght,SampleFrequency:Integer;
                   SwitchOnValue:Byte); (ADPCM)
  (Stands alone !)
  (SwithcOnValue 0..127 = the loudness, which turns sampling on.   
   Test the loudness with PcmSample to find out the right value.)

- Procedure PlaySample(StartAddr,SampleLenght,SampleFrequency:Integer;
                       Volume:Byte);    (ADPCM)
  (Stands alone !)

- Procedure RepeatSample(StartAddr,SampleLenght,SampleFrequency:Integer;
                         Volume:Byte);   (ADPCM)
  (Stands alone !)
  ( REM Max. SampleFrequency is 16000 Hz, Volume = 0..255.
    StartAddr and SampleLenght refer 4-byte groups in AUDIO RAM.)

- Procedure StopSamplePlay;              (ADPCM)
  (Stands alone !)

- Procedure SaveSample(FileName:StringType;AudioAddress:Integer;Bytecount:Real);
  ( Needs MsxDos2.inc )
  ( REM Special value ,ByteCount = 0, means that all the AUDIO RAM
    will be saved. In this case use function AudioRamSize to update automaticly
    variable SizeOfAudioRam.)

- Procedure LoadSample(FileName:StringType;AudioAddress:Integer;Bytecount:Real);
  ( Needs MsxDos2.inc )
  ( REM Special value , ByteCount = 0, means that all the file will be loaded. )
  ( Accessing audio ram during playback stops playback ! )

- Procedure PcmSample(DestinationAddr,SampleLenght,SampleFrequency:Integer;
                      ValueToAdd:Byte);    (PCM)
  (Stands alone !)
  (Samples PCM-data via MSX Audio register $1a directly to DestinationAddr
   in conventional RAM.  Data is in the form of 2's complement.
   SampleLenght = count of sampled bytes.
   ValueToAdd, if not zero, this value is added to sampled data to produce 
   easily required graphic coordinate. If zero adding is ignored )

- Procedure PcmSwitch(SwitchVolume:Byte); (Values 0..127)
  (Stands alone !)                         (PCM)
  (Waits sound loudnes to reach given SwitchVolume level and returns
   doing nothing else. 
   Used to switch the PcmSample on.
   )

- Procedure PcmPlay(SourceAddr,SampleLength,SampleFrequency:Integer;
	          Volume:Byte); (REM Volume 0..7) (PCM)
  (Stands alone !)
  (Plays back PCM data from conventional memory.)
  (Occupies totally Z80 !);

- Variable SizeOfAudioRam:Real , which is updated by function AudioRamSize;
}