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DhrBaksteen / ArduinoOPL2

Arduino library for use with the OPL2 board (YM3812) and OPL3Duo (YMF262)
MIT License
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OPL2 operates on a 4 MHz resonator instead of 3.59 MHz. #82

Closed Opekusha closed 3 years ago

Opekusha commented 3 years ago

How to programmatically adjust the frequency? How to get into unison? Synthesizers usually have this tuning. I haven't figured out which library function to use yet.

DhrBaksteen commented 3 years ago

The library is built around using a 3.579 MHz clock for the YM3812, as you normally would for this chip. So there is no function to adjust for different clock frequencies. Using a different clock frequency means that you have to recalculate all the F-numbers and possibly also use different frequency blocks to be in tune with a normal 3.579 MHz clock.

Nb. setFrequency also assumes a 3.579 MHz clock for its block and F-number calculation.

Opekusha commented 3 years ago

Thanks I got it. It's easier to find a resonator. The question has been settled.