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document AY period macros

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Dalia 2024-12-20 12:37:15 -07:00
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4
doc/4-instrument/ay8910.md
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@ -35,3 +35,7 @@ note that timer effects might not be supported by VGM players, and are rather CP
- **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.
- these two must be set in order for AutoEnv to work!
- **Force Period**: sets the tone period (wavelength).
- overrides Arpeggio and Pitch macros.
- **Env Period**: sets the envelope period.
- ignored if both AutoEnv macros are set.

4
doc/4-instrument/ay8930.md
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@ -29,5 +29,9 @@ note that using samples on AY is CPU expensive!
- **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.
- these two must be set in order for AutoEnv to work!
- **Force Period**: sets the tone period (wavelength).
- overrides Arpeggio and Pitch macros.
- **Env Period**: sets the envelope period.
- ignored if both AutoEnv macros are set.
- **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.