YM2149F Teensy Synthesizer

@TODO - Documentation.

3 voices, 1 MIDI channel per voice.

• CC1 - Softwave-voice / Env-voice finetune (Software PWM)
• CC2 - Softwave-voice note detune in synth type:5, otherwise square-voice detune
• CC3 - Synth Type:
  • 0 - Square-voice
  • 1 - Square-voice + Env-voice Saw (Square pitch modulations are soloed for "acid" effects.)
  • 2 - Square-voiec + Env-voice Triangle (Square pitch modulations are soloed for "acid" effects.)
  • 3 - Env-voice Triangle
  • 4 - Env-voice Saw
  • 5 - Square-voice + Softwave-voice (PWM)
  • 6 - Square-voice + Softwave-voice (Square pitch modulations are soloed for "acid" effects.)
  • 7 - Noise
• CC4 - Volume Env Shape: 0=OFF, 1-63=Ramp up time, 64-127 Ramp down time
• CC5 - Note Glide Amount
• CC6 - Vibrato Rate
• CC7 - Vibrato Depth
• CC8 - Trigger noise delay (useful for snare tail or Env synth type effect)
• CC9 - Pitch Envelope amount
• CC10- Pitch Env Shape: 0=OFF, 1-63=Ramp up time, 64-127 Ramp down time
• CC11- Transpose: 64 center.
• CC120 - Load Preset (0-15)
• CC121 - Save Preset (0-15)
• CC122 - Dump Patches