# AY8930 instrument editor

AY8930 instrument editor consists of these macros.

- [Volume] - volume sequence
- [Arpeggio]- pitch in half-steps
- [Noise Freq] - AY8930 noise generator frequency sequence
- [Waveform] - selector of sound type: pulse wave tone, noise or envelope generator
- [Pitch] - fine pitch
- [Phase Reset] - trigger restart of waveform
- [Duty] - duty cycle of a pulse wave sequence
- [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 divided by denominator
- [Noise AND Mask] - alters the shape/frequency of the noise generator, allowing to produce various interesting sound effects and even PWM phasing
- [Noise OR Mask] - see above