hello i'm trying to port an analog synth to pd. one of the parts in the rather confusing schematics of the synth requires a white noise generator with a "range" control. Not sure i understand it (or that it is a crucial bit of the synth for that matter), but if it means the amplitude range, using [clip~] on a [noise~] would do the trick, right? Maybe someone with experience on analog synths can throw some light into this?
Well... Im no synth expert (have couple of digital oldies and an analogue one) but many synths use noise generators as input in a certain part of the circuitry. Mainly because white noise generators are really cheap/easy to build with few components (this is true in the digital domain too).
If they say that it has a range control, they ought to be talking about either volume (envelope) or frequency limitation - the second makes not much sense because it conflicts with the concept of white noise itself (random frequencies all over the spectrum with equal power).
You should try either way (one is try adrs or clip the signal that comes out of the white noise) the other is filtering the range (some older synths use a trick to make sounds using the white noise: they filtered it with a sharp q filter and generate different sounds that would ultimately feed the circuit and change the resulting sound).
Can you post the schematic? I got curious..
On Wed, May 19, 2010 at 12:15 AM, nate potaxpotax@gmail.com wrote:
hello i'm trying to port an analog synth to pd. one of the parts in the rather confusing schematics of the synth requires a white noise generator with a "range" control. Not sure i understand it (or that it is a crucial bit of the synth for that matter), but if it means the amplitude range, using [clip~] on a [noise~] would do the trick, right? Maybe someone with experience on analog synths can throw some light into this?
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nate wrote:
hello i'm trying to port an analog synth to pd. one of the parts in the rather confusing schematics of the synth requires a white noise generator with a "range" control. Not sure i understand it (or that it is a crucial bit of the synth for that matter), but if it means the amplitude range, using [clip~] on a [noise~] would do the trick, right?
More likely it's something to adjust the balance of low and high frequency noise, usually between some approximation of pink noise and white noise, like the difference between the sound of a waterfall and a deflating tire. There's a [rojo~] object in pd-extended that might work for that.
Martin
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Martin Peach -
nate -
Pedro Lopes