furnace/doc/4-instrument/psg.md

Sega PSG instrument editor

The instrument editor for Sega PSG (SMS, and other TI SN76489 derivatives) consists of these macros:

• Volume: volume sequence.
• Arpeggio: pitch sequence.
• Duty: noise mode.
  • 0: short noise; preset frequencies.
  • 1: long noise; preset frequencies.
  • 2: short noise; use channel 3 for frequency.
  • 3: long noise; use channel 3 for frequency.
• Panning: output for left and right channels.
  • only on Game Gear!
• Pitch: fine pitch.
• Phase Reset: trigger restart of waveform.