Oleg Sergeev wrote:
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>I understand that it is so far from 8052. But I think only about emulation of some parts. As I said, I wish MOD player based on 8052. And I will do it anyway when some free time come.


I think the approach of "emulating parts of Amiga" isn't the most optimal. Better check out MikMod and try porting it to '51...

>>Generating synth sounds might mean some trouble.

>No if we take fast MCU with PCA - its modules may be used as PWM for audio channels. Moreover, there are some derivatives which have DACs built-in (for example, from SiLabs).

I don't say it's impossible, it just takes a lot of CPU time, you may be short on that time for other channels/instruments.
Watch out for the DAC speed. Sometimes it needs quite some time to pick the value you've written to it.

>Are you sure that they are MODs? As I know, such technique is used to play MP3 with "Paula" chip of Amiga.

Yes, I'm sure, that was an obscure technique of splitting one sample into two and playing them both together - it was exploiting some specific properties of Paula, which will be probably hard to replicate. But even if you fail to replicate them, you'll lose quality of what, 3% of MODs released?

> This is my main problem. I have not enough information about sound effects. You see, I am not a musician and all these Arpeggio, Portamento, Tremolo, Slide, Vibrato etc confuce me...

I hope MikMod source should explain a bit... :)