[EFM] VCO Idea

[Harry Bissell]

It is not only possible but has been done before... however the "sonic"
results
may be a little underwhelming.  Every waveform you can draw with a limited
number
of sliders sound a lot like many other waveforms.

I'd look into "Walsh Functions"... there are two excellent sites owned by
fellow
synth-diyers
www.members.xoom.com/_XOOM/Neil_Johnson/walsh.html is one
www.techrepairs.freeserve.co.uk/projects.htm

Check them out... you can still have sliders but they will give a lot more
sounds...

H^)  harry


Mitchell Hudson wrote:

>     I have been playing with the breadboard and my Forest Mims books
> from radio shack and have made the most glorious display of running LEDs
> with a 4017 decade counter and a 555 timer. I must point out to all the
> beginning DIYers that a small success is most inspiring! try it.
>
>     So anyway I had the idea that I could feed each of ten outputs
> through a pot into a an op-amp and I would have a sequencer! Then I
> thought if I ran the timer fast enough maybe this could act as a VCO
> with a wave form that could be shaped with these ten pots.
>
>     My question to the group is do you think this is possible? it seems
> to me that I would want to make my 555 timer voltage controled at ten
> octaves to the volt, assuming that it would take 10 clock pulses to send
> the 4017 through one complete cycle.
>
> your comments greatly appreciated
> Thanks
>
> --M