Aleksi Eeben has written a new tracker that gives you up to 8 channels on a single (6581) sid.  There are some limitations with the extra channels so make sure you read the docs.

download

When you save your song out it's an executable file.

Oh niiice Aleksi strikes back ! smile

does it only work with the 6581? I guess so, but I'm asking just to be sure.

Yes, old SID only. Perhaps also on new SID with digi fix, not sure about that.
Anyway, here's a quick vid of this thing in action: https://youtu.be/978WIztBYO4?t=16325

irrlichtproject wrote:

Yes, old SID only. Perhaps also on new SID with digi fix, not sure about that.
Anyway, here's a quick vid of this thing in action: https://youtu.be/978WIztBYO4?t=16325

video appears to be blocked for copyright reasons

Is it like 3 channels of the orginal voices and the rest like echo of the orginal channels?

The other channels are software generated.  A while back Aleksi wrote a software SID emulator for the Vic-20 so it's similar to that.  You have 5 generated pulsewave channels played through the volume register to go with the 3 sid channels.  All channel's contents and independent of each other, though there are some limits with the generated channels which are in the pdf.

Great for chord stacking ey! I would try out the 6-channel mode first. smile