Hi,

I'm fairly new to designing synthetizer with Pure Data and I was wondering if you could help with this undertaking of reproducing the basic fonctionalities of a Monotron with Pure Data, which is a small analog synthetizer that reproduces vintage synth sounds, as described here : http://www.korg.com/monotron. The page also contains the basic schematics, the full schematics are available here.

I've began to grasp what are oscillators, VCF and LFOs, but I still don't understand quite well how to plug them all together to emulate the analog circuitry of the synth. Understand that I don't want to absolutely reproduce the Monotron: a simple, vintage sounding synth would be a good start.

Thank you for your time.

The moog~ filter produces nice sounds, but generates a lot of clipping. You said it's possible to build our own filter, in my case it would some kind of low pass filter with added resonance, how should I proceed ?

Ok, so here's what I come so far (see attached file). The pd 16x is an object that produce an antialiased oscillator that I found in the documentation. I have my LFO which is linked for the moment to a VCF filter. Notice the radio button that I put to flick it to oscillator (unfortunately, I don't know how to do that yet).

I came across nice sounds when I modulate the sliders, but I think something missing, perhaps due to the nature of the filter. Also the first parameter of the vcf~ object appears to have a huge influence on the sound, but I don't know what is it nor how to change it.

Some recommendations ?

http://www.pdpatchrepo.info/hurleur/patch.png

That's right, it's to learn things that I'm doing it. There're examples of Pd synths over the net, but it's never quite the sounds I want, and I'm more interested in the building, to understand how it works rather than using a final product.