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Author Topic: LFO random drift  (Read 766 times)

Riemac

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LFO random drift
« on: February 01, 2023, 07:22:34 pm »
It would be nice, if you could add a LFO waveform with random drift to simulate oscillator drift of analog synths.

DrJustice

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Re: LFO random drift
« Reply #1 on: February 01, 2023, 08:51:32 pm »
Old analogue oscillators don't really drift a lot once they're warmed up, but they may track the CV differently, each oscillator circuit being ever so slightly different from the others, mostly due to component inaccuracies. 

To simulate this, the Keyboard row in the modulation matrix can be set to "Voices" using the "Sound Edit/Keyboard/Kbd Src" menu. This gives a different value for each voice that can be used to offset pitches, wave shape, envelope times and so on.

Check out Jason Cooper's web site that is dedicated to this area of synthesis, know as Voice Component Modeling:
https://www.voicecomponentmodeling.com/

Riemac

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Re: LFO random drift
« Reply #2 on: February 17, 2023, 06:59:12 pm »
I would like some kind of drift function like in the analog oscillator in Pigments. The drift in Pigments changes the pitch of every voice slightly over time.

blacker

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Re: LFO random drift
« Reply #3 on: February 21, 2023, 09:16:07 pm »
LFO (S+H) to pitch, or setting the keyboard mod "Voices" to modulate pitch would probably work well for some randomness.

Riemac

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Re: LFO random drift
« Reply #4 on: February 22, 2023, 09:04:16 am »
QUOTE
"LFO (S+H) to pitch, or setting the keyboard mod "Voices" to modulate pitch would probably work well for some randomness."

The problem with LFO (S+H) is that it "jumpes" to random values, not ideal for analog pitch drift. A random glide option would be much better for this porpose.
Keyboard mod "Voices" is nice, but only has different static values per voice.

 

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