I’ve been building up a Shruthi-1 kit (v0.8 PCB, SMR4mk2 filter). I’ve been documenting my progress here - http://www.flickr.com/photos/infovore/sets/72157633835378992 .
It’s all together, which means I could start to tune the filter. However, that’s not proving possible.
When I turn off both VCOs and set the filter so it ought to self oscillate, I hear absolutely nothing from the output - well, not quite; just a faint hissing.
Also, when I try scrolling through the presets, it’s as if the filter board isn’t quite working: cutoff and resonance controls do effectively nothing (and as such, all the sounds are pretty similar - a bit buzzy, not quite like the demos of said presets).
I don’t have an audio lead or hi-res camera with me today, so can’t post audio demos or photos, but can do so on Monday. In the meantime: any idea what might be up, and where I ought to start looking?