Indeed. There's no logical reason for that, though, the 'drum' channels, if enabled, take over some of the other channels. I think they just did this so you can choose to mix them at different volumes.Shiru wrote:One interesting thing about YM2413: it has not single mono output, but two separate outputs for melodic and drum channels.
What I find even stranger is that some chips have an internal DAC for their PSG-type waves, but not for the FM stuff. You'd think it would have been easier to just mix the PSG stuff with the FM stuff.