Hi list,

After the recent thread about the 'purity' of the sinewaves from the A-
110, I started looking at how these could possibly be improved. I came
across a simple conversion circuit, not that much more complicated than
what is in there at the moment, and when I breadboarded it, I was
stunned at just how good the sine waves from it are - I have created a
new page at my website with a couple of scope traces:

http://mysite.wanadoo-
members.co.uk/tstinchcombe/synth/invest/invest.html

(watch the line-wrap there!).

I'm in the process of seeing how feasible it might be to actually
modify an A-110 to incorporate the extra bits 'n bobs to do this. (I
also want to get the original paper of the circuit, so that I can check
that the component values are 'optimal'!)

Tim