pitch to voltage circuit...

[giantsteps]

I've been playing around with a couple of oscillator circuits and I was wondering if there is a circuit that will change the signal from a guitar to a resistance? It would be neat to replace the "pitch" potentiometer on an oscillator with a circuit to control that pitch with a guitar. I did  a search and came up with one thread that didn't contain specific enough information for a build. Even if it wasn't all that pretty or acurate, it would be neat to try.

Any ideas?

Thanks,

Chris

[jacobyjd]

you'd be getting into some crazy fundamental-extraction issues that plague just about anyone trying to do crazy guitar/VC stuff, I think.

[frequencycentral]

you'd be getting into some crazy fundamental-extraction issues that plague just about anyone trying to do crazy guitar/VC stuff, I think.

Yes, madness, sadness and frustration lies that way.....

.......though this may be of interest: http://www.diystompboxes.com/smfforum/index.php?topic=72532.0

[snufkin]

on ampage there is a pitch to voltage converter

someone on electromusic got it up and running with a few tweaks search pitch to voltage / pitch to cv


not an easy build


i have the board etched and half filled

[Mark Hammer]

http://hammer.ampage.org/files/GuitarP2V.PDF

http://www.synthdiy.com/files/2008/pv1_611.pdf

[cpm]

i have on the breadboard something like that. Some bits from a boss pedal (fedbacker?): a fundamental extractor (also found on the OC2) and a phse locked loop that converts that frequency into a voltage. It can be modified by an LFO or whatever and then played back into a generated pitch. It sounds very 'nintendo-ish', but it can be processed to add more bells and whistles.

my aim is to combine it into a ring modulator so you can set the pitth from a note played on the guitar

[giantsteps]

http://hammer.ampage.org/files/GuitarP2V.PDF

http://www.synthdiy.com/files/2008/pv1_611.pdf

Whew! Those are a little out of my league...

On second thought I think I'm going to try an amplitude to resistance circuit...something like the input of an envelope filter. I wanted to try them with something like a hysteresis oscillator. i think that will get me the desired weirdness...

Perhaps I'll try those when I've gotten my board making skills down...still perfboarding...

Thanks,

Chris

[giantsteps]

I think this is what I'm going to try:

Use an "Electra Distortion" circuit as a pre-amp, but only 1 diode (LED) to ground. The LED will serve as the "trigger."

Hysteresis oscillator comes afterwards:

Replace the "frequency" potentiometer with LDR(1).
Put another LDR(2) between pin 7 and the guitar signal.

When guitar is played, LED flashes, LDR1 makes H.O. frequency increase, LDR2 makes effect audible. When no signal is present LDR2 prevents the effect from being heard.

Does this sound right?

Thanks,

Chris