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Pitcher the noise source

Pitcher the noise source
« on: September 15, 2021, 07:32:13 PM »
A question spontaneously comes to mind.
How could we "pitch" the noise? that would be interesting, wouldn't it?
Paper & Pencil.
Prophet 6, Rev2, Pro3

Re: Pitcher the noise source
« Reply #1 on: September 15, 2021, 11:54:13 PM »
A question spontaneously comes to mind.
How could we "pitch" the noise? that would be interesting, wouldn't it?

You can use one of the oscillators as the base pitch and then modulate it (pitch modulation) with noise, then you can go from a clean wave with just some noise all the way to howling storm kind of pitched noise. You can get different characters by tweaking the wave shape and shape mod.

Alternatively you can turn up the resonance of the filter until it seld oscillates and then modulate the cutoff frequency with the noise source.

If you want more crackling variation to the noise, use oscillator 3 in LFO mode with some complex wave as a modifier to the noise modulation. Then the wave of osc 3 will turn vary the amount of noise modulation.

Re: Pitcher the noise source
« Reply #2 on: September 16, 2021, 11:32:54 PM »
Noise is pitched already. In fact itís TOO pitched because it has ALL THE PITCHES!  ;D

White noise has all audible frequencies and the other colors like pink and brown are just filtered to restrict the range. In the analog realm what pitching noise would mean is what a sample and hold circuit does. Since it takes a sample of the noise signal and holds it for the length defined by  the rate control.

Otherwise youíre taking something that is already pitched like an oscillator or filter and adding some properties of noise by modulating themówhich can be very cool but itís not pitching the noise. Itís noising the pitch!

jmg8

Re: Pitcher the noise source
« Reply #3 on: September 18, 2021, 05:11:55 AM »
I find all the waves shapes work well for creating noise, pitch them high and use noise as a mod source to modulate the OSC frequency. Changing the wave shape and shape mod can change the timbre of the noise and sometimes sound like filter sweeping. (square with high shape mod sound like vinyl crackle)
The amount of modulation will determine how tonal the noise will be, eventually resulting in noise that barely contains any recognizable pitch. One good thing about key tracking noise is that it doesn't need to have a recognizable pitch in order to benefit from key tracking. Just the fact that the noise shifts its frequencies with the pitch of the OSCs makes it glue nicely to the sound.