furnace/doc/4-instrument/ay8910.md

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# AY-3-8910 instrument editor
The AY-3-8910 instrument editor consists of these macros.
- **Volume**: volume levels sequence
- **Arpeggio**: pitch sequence
- **Noise Freq**: AY-3-8910 noise generator frequency sequence
- **Waveform**: selector of sound type - square wave tone, noise or envelope generator
- **Pitch**: fine pitch
- **Phase Reset**: trigger restart of waveform
- **Envelope**: allows shaping an envelope
- **AutoEnv Num**: sets the envelope to the channel's frequency multiplied by numerator
- **AutoEnv Den**: sets the envelope to the channel's frequency multiplied by denominator