Remember the Sonica? Title link takes you to more pics sent my way via BirdFlu. "Attached are some pics I took of my Sonica when I had it apart to fix it. You can see it really is a Serge board inside.
Note what also looks like a date of 6-79. The pics also includes documentation.
Update: Some more comments via BirdFLU in the previous post. Also I disabled comments here to keep them all in the other post.
"I forwarded some photos of the Sonica innards and the Sonica manual to matrix. I'll try to forward some sound samples too. It's just a simple buzzy kind of triangle wave. A very pleasing mellow tone. Pressing on the Tone pad sort of opens the filter a tiny bit more. It's not some amazing synth, but it wasn't meant to be. It's easy
and fun to play and that was the intent. Also, when I got mine, I was surprised how small it is, it's only 18" It doesn't need to be any bigger, I just thought it would be for some reason. Somebody somewhere has got ot have video of Donna Summer's band playing 24 of them. I've really got to see that!!"If anyone finds it post a comment.
