[sdiy] super cheap synthisizers

[Dominic Tarr]

wow, you guys are fast.

yeah, I was planning to use PIC chips cos they are easily avialable, and I've found lots of documentation on how to program them, and I can easily build a programmer. I was planning on counting the clock cycles, and only having a pulse out put, a saw would be nice, but I can live with out it. especially if I can  have 2 pulses.

midi control of course, cos otherwise you would still need a midi to CV converter, and that doesn't sound "super cheap"

there would be lots of ways around not having enough resolution in "sample" time, like making the first period slightly higher and the next one slighty shorter, so it works out even. I'd imagen that this would probably sound quite interesting too. <<< also as I expect to be using it mainly for bass so I don't think having only 20 steps to have a 4kHz note is much of an issue.

I guess I'm a bit of a newbie though, so please bear with me...

does any one have some really simple designs for VCFs and VCAs lieing around?

really it's the analog side of things I'm not sure about, like what would I need to do to bring the ttl level out puts up to line level (or what ever) for feeding it into filters?

cheers - Dom