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# AY-3-8910 instrument editor
the AY-3-8910 instrument editor consists of two tabs.
the AY-3-8910 instrument editor consists of three tabs.
## Sample
@ -10,6 +10,13 @@ the only differences are the lack of an "Use wavetable" option, and the presence
note that using samples on AY is CPU expensive!
## Timer Macros
- **Timer FX**: timer effect type sequence. 0- off, 1- tone PWM, 2- envelope distortion, 3- reserved
- **TFX Offset**: PWM speed sequence.
- **Timer Num and Den**: multiplier of a virtual square wave modulator (?)
- **PWM Boundary**: sets the range of a pulse width modulation
note that timer effects might not be supported by VGM players, and are rather CPU expensive!
## Macros
- **Volume**: volume sequence.