Cool stuff. That's exactely what I had in mind. Can I have the source so I can modify it to work with my soundchip and perhaps have multiple channels?

Edit:
I want to add "hardware" pitch bending with different modes such as LFO, portamento and sweep. The sound processor will also have a lookuptable with musical notes' pitch values. If you write to one of the three dedicated "musical note" registers it will relay it to the freq-hi and lo registers and it will turn on the gate of the channel. This saves a lot of memory and time on the calculator side!

Example:
Calculator sends a NOTE ON normally:
00 ff - write ff (0-255) to register 00 (Freq Lo)
01 ff - write ff (0-255) to register 01 (Freq Hi)
04 17 - write TRIANGLE|GATE_ON to register 04 (Conrol reg)That's 6 bytes!

Calculator sends a NOTE ON with this new feature:
1D nn - write nn(0-255) to register 29That's only two bytes!

Very nice! ^^ How many channels are you planning on supporting?

Wooo, great song Maybe you could write a convertor yourself? Would it be that hard to make one?

I am not that good at programming for the pc and....

Hum, I bet that with your Axe knowledge, if you start up with a "c-language cheap tutorial", within a couple of hours you'll have your converter just about ready. But, i'm just guessing, of course.. Fine work, btw.

I did some more programming on the pc. I just have to find a chiptune tracker that outputs a somewhat interpretable stream of data so I can easily convert it with my program. (or make my own tracker using C)

Another interesting thing: I have plenty of I/O pins left on the atmega328 (I only use 4 at the moment) and I have a touchscreen I grabbed out of a broken nintendo DS. In my avatar you can see what that will look like and some people might have seen the video on my youtube channel. I know someone already did this. I might use his code or stick to my own protocol I use to send data to AXE programs (that's way quicker than transferring data packages using the BASIC link protocol)

I just did

The source of that tracker suggests it's for linux. I think I can build a tracker from the ground up.

I'd like to be able to convert PSID to TIMID. That way I can open up a huge library of music.

The sound is quite good . In your video descriptions, though, you should include at which time we first can hear sound, because some of us don't understand all that hardware/sound talk and might simply want to hear the sound immediately.