AY8910 instrument editor

AY8910 instrument editor consists of 7 macros.

[Volume] - volume levels sequence
[Arpeggio]- pitch sequence
[Noise frequency] - AY8930 noise generator frequency sequence
[Waveform] - selector of sound type - square wave tone, noise or envelope generator
[Envelope] - allows shaping an envelope
[Auto envelope numerator] - sets the envelope to the channel's frequency multiplied by numerator
[Auto envelope denominator] - ets the envelope to the channel's frequency multiplied by denominator