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Ohhh...

people over chiptunes complains that the Commodore SID is hard to emulate because the analog parts...

The analog parts provide some interesting undocumented features. It’s possible to play 4 channels of 8-bit samples, filter them and still have 2 of the 3 SID channels free for other audio.

https://www.youtube.com/watch?v=Y6mXLxUZvzg

Hey downvoters, I never wrote playing 4 channels was a feature—it’s still possible, though.

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