Things about Maestro 2E

Apu Register:
0: DMA ,Filter and APU Type
  Bit 14: APU DMA enable
  Bit 13: Int on Loop
  Bit 12: Endcurve ??
  Bit 4-7: Apu Typ
  HiByte: APU Curve Type
  Bit 10-11: APU Envelope State
  Bit 8-9: Apu Envelope Type
  Bit 2-3: Filter Type
  Bit 0-1: Filter Q ??

   Apu Modes:
	0x00    Apu Off
	0x01	16-Bit Linear Sample Player
	0x02	16-Bit Stereo Sample Player
	0x03	8-Bit Linear Sample Player
	0x04	8-Bit Stereo Sample Player
        0x05	8-Bit Differential Sample Playrer
	0x06	Digital Delay Line
	0x07	Dual Tap Reader
	0x08	Correlator
	0x09	Input Mixer
	0x0A	Wave Table Mode
	0x0B	Sample Rate Convertor
	0x0C	16-Bit Ping-Pong Sample Player
	0x0D	Reserved 1
	0x0E	Reserved 2
	0x0F	Reserved 3

   Filter Q:
        0x00    Less Q
        0x03    More Q

   Filter Type:
        0x00	2 POLE LOPASS
	0x01    2 POLE BANDPASS
	0x02    2 POLE HIPASS
	0x03    1 POLE LOPASS
	0x04    1 POLE HIPASS
	0x05    FILTER OFF

   ATFP Type
	0x00	AMPLITUDE
	0x01	TREMELO
	0x02	FILTER
	0x03	PAN

   ATFP FLG
	0x00	OFF
	0x01	WAIT
	0x02	DONE
	0x03	INPROCESS
    
1: ??
2: HiByte: Effects, LoByte: Frequenz untere 8 Bit
  Bit 8-15: Bit 0-7 Frequenz
  Bit 6-7: APU Effect Channel
  Bit 5: Dual Effect Send
  Bit 4: 6dB
  Bit 3: Apu Submix Mode
  Bit 0-2: Apu Submix Group
   
3: Bit 8-23 Frequenz
  Bit 0-13: Apu Step Size

4: APU Phase
  Bit 8-15: APU Wave 64k Page
  Bit 0-7: APU Phase

5: APU Wave Start
Read 5: Sample Adress

6: APU Wave End

7: APU Wave Loop   

8: Effect's or Amplitude env
  Bit 12-15: Tremolo Rate
  Bit 8-12: Tremolo Depth
  Bit 0-7: Apu Effect Gain

9: HiByte ?? (set to 0xd0) LoByte Amplitude dest.
  Bit 0-15: Amplitude now 

10: LoByte Panning (00 - 10) HiByte ?? (Set to 8f)
  Bit 8-15: Filter Tuning
  Bit 6-7: Radius Select
  Bit 0-5: Polar Pan

   Polar Pan:
 	0x00	CENTER CIRCLE
	0x01	MIDDLE RADIUS
	0x02	OUTSIDE RADIUS
	0x03	??


11: Routing Stuff
  Bit 15: Invert Polarity B
  Bit 8-14: Data Source B
  Bit 7: Invert Polarity A
  Bit 0-6: Data Source A

  Bit 8-15: Apu Vibrato Phase
  Bit 4-7: Apu Vibrato Depth
  Bit 0-3: Apu Vibrato Rate
 

Wave Cache Register: