A 4046 based synth demonstrator

[duck_arse]

I'd say "the universe", man.

[strungout]

Very cool circuit, Jim! Thanks for sharing.

I used a 2272 opamp. An upgrade to the 272, so the datasheet says.

I ran it through my octaver (dry, +1, -1, -2) and it sounds great! Tried it with the autowah I just built and the vocalisations sound interesting. I get quee's and quack's. Some settings I haven't tried yet. Even brushing the pick lightly against a string makes cool vocal sounds.

I'm gonna build this, but I wanna look around for what to add to it.

[Ben N]

I ran it through my octaver (dry, +1, -1, -2) and it sounds great!

Using any particular waveform?

Tried it with the autowah I just built and the vocalisations sound interesting. I get quee's and quack's. Some settings I haven't tried yet. Even brushing the pick lightly against a string makes cool vocal sounds.

Seems to me that putting a loop after the source switch & ahead of the filter, with an option for series/parallel return might be an interesting way to handle other effects, like octave & other filters

[strungout]

This thread was necro'ed!

But, @ Ben N: All of them have their own flavors but I think I liked the pulse and saw most. Just now, I was playing with mixing 2 waves together. A lot of wobble happens (Square + mix for example). It'S interesting. But there's some volume issues... Think I might start another thread to figure out that stuff.

[Ksander]

+1 on the thanks for sharing. I built a version of this too, replacing the 272 (couldn't find one) with a TL072 and an LM393 to first amplify and then square the signal. It is awesome; very odd and versatile! It certainly will become a pedal!

One thing though: there are glitches, like sudden occassional pops in the sound. Are these produced by the IC, and also present in the original circuit?