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What is SME4.0 ? Who is Alex Wulms?

o_O

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Different is if you interlace the execution of two different effects. I mean that you can call a routine that play music on even frames, and another that plays effects on the odd frames. What ugly result should I expect from such a mess?

Uhm, I'm pretty sure that can't be done... That works fine when you're playing samples, but then you're using a frequency far higher than 50/60Hz. Just reserve one channel for SFX, that's pretty much the best you can do. You could I guess prioritize both music and SFX, dropping whatever sound has the lowest priority, but that's a lot of work and perhaps not worth the effort. In the end though, you'll still have only three channels to work with... Why not consider using an SCC as well?

hey, if yer gonna use that beautifull soundchip we call PSG you'll never have to worry about a slow replayer man! PSG=fast and only 3 channels. don't bother.

Try my demo, it is at magoo's webpage
you will understand by youself why I am worryed
about speed and computational load

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Uhm, I'm pretty sure that can't be done... That works fine when you're playing samples, but then you're using a frequency far higher than 50/60Hz.

As far as I can see the signal will suffer a terrible aliasing
having aliases in 25Hz (about -4db), 75Hz (about -13,5db)
and so on.

In this topic maybe we could exchange more ideas in this subject http://www.msx.org/forumtopicl4829.html