furnace/doc/4-instrument/nes.md

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# Standard instrument editor
The instrument editor for NES consists of these macros:
- **Volume**: volume.
- **Arpeggio**: pitch in half-steps.
- **Duty**: duty cycle and noise mode.
- pulse duty cycles:
- `0`: 12.5%
- `1`: 25%
- `2`: 50%
- `3`: 75%
- noise modes:
- `0`: long noise.
- `1`: short noise.
- **Panning**: output for left and right channels.
- **Pitch**: fine pitch.
- **Phase Reset**: trigger restart of waveform.