Document standard instr. noise modes.

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Electric Keet 2023-07-13 16:35:55 -07:00
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The instrument editor for NES and PSG (SMS, MSX, and such) consists of these macros: The instrument editor for NES and PSG (SMS, MSX, and such) consists of these macros:
- **Volume**: volume - **Volume**: volume.
- **Arpeggio**: pitch in half-steps - **Arpeggio**: pitch in half-steps.
- **Duty**: duty cycle and noise mode for NES channels. _Note:_ This has no effect on Sega Master System. - **Duty**: duty cycle and noise mode.
- **Panning**: output for left and right channels - NES noise modes:
- **Pitch**: fine pitch - `0`: long noise.
- **Phase Reset**: trigger restart of waveform - `1`: short noise.
- PSG noise modes:
- `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.
- **Pitch**: fine pitch.
- **Phase Reset**: trigger restart of waveform.