Noise Oscillator Relationships

forbin · Posted: Tue Jan 19, 2010 6:55 pm Post subject: Noise Oscillator Relationships

Hi Thomas et.el.

I have been looking at the noise source that you have used in the Clangora and also talk about in your Noise Generator Cookbook, the Oscillator Bank Noise Source.

I was wondering how you decided upon the ratios between the oscillators? I thought that they may have been prime numbers (which they aren't) or some other interesting mathematical relationship?

Thomas_Henry · Joined: Jul 24, 2009 Posts: 108 Location: N. Mankato, MN

Hi,

There are times when a cigar is nothing more than a cigar.

I just used intuition, guessing and my ears to select the frequencies.

Thomas Henry

forbin · Posted: Wed Jan 20, 2010 8:57 pm Post subject:

Thanks for that Thomas! It was purely academic interest... I have been fiddling around with a variety of noise sources recently and was re-reading your great Cookbook.

Oh and by the way I have a laid out a press'n'peel PCB for the VC Noise source, from your 21st Century Synth. Book. Is it OK to post it for other members? I have only referenced the parts by their number, not their value, so if somebody wants to build it they will still have to buy the book.

Thomas_Henry · Joined: Jul 24, 2009 Posts: 108 Location: N. Mankato, MN

Hello again, Forbin,

Many thanks for asking. See what Tim Servo thinks first, since Magic Smoke is the official publisher of that collection.

And thanks for the kind words. I loved doing that noise book and am glad someone else gets something out of it.

Thomas Henry

forbin · Posted: Thu Jan 21, 2010 6:37 pm Post subject:

No Worries! I am currently trying my prototype layout and will almost certainly tweak it a bit more...

forbin · Posted: Thu Jan 28, 2010 8:12 pm Post subject:

Hi Thomas -- again probably more of academic interest than anything else but i got the Noise Source all going and since i have access to some nice gear at work I collected some results for my notebook. Thought that you might also be interested. It is on my blog at:

http://forbinthesynthesizer.blogspot.com/2010/01/more-noise.html