I'd like to make a noise generator that creates white noise and pink noise, and allows you to mix to taste, basically choosing anywhere you want in between the two.
I've started simulating the basics for this. My circuit is based on ideas from these three sources:
https://www.edn.com/design/analog/4420926/White-noise-source-flat-from-1Hz-to-100kHz
https://www.maximintegrated.com/en/app-notes/index.mvp/id/3469
http://www.electronicdesign.com/analog/build-simple-precision-pink-noise-generator
In my simulation, the white noise is faked with an AC voltage source, and the pink noise filter looks beautiful. I thought I could just use a pot to passively mix the two, but I don't get the expected result. I assumed that since white noise is "flat" and pink noise has a straight line frequency plot (-3dB/octave slope,) that mixing the two would yield a straight line frequency plot as well, but the simulation output is noticeably curvy.
Is this not a valid way to mix these signals? Do I need a different approach? Or did I just have misguided expectations in terms of the frequency plot of the mixed signals?
I've started simulating the basics for this. My circuit is based on ideas from these three sources:
https://www.edn.com/design/analog/4420926/White-noise-source-flat-from-1Hz-to-100kHz
https://www.maximintegrated.com/en/app-notes/index.mvp/id/3469
http://www.electronicdesign.com/analog/build-simple-precision-pink-noise-generator
In my simulation, the white noise is faked with an AC voltage source, and the pink noise filter looks beautiful. I thought I could just use a pot to passively mix the two, but I don't get the expected result. I assumed that since white noise is "flat" and pink noise has a straight line frequency plot (-3dB/octave slope,) that mixing the two would yield a straight line frequency plot as well, but the simulation output is noticeably curvy.
Is this not a valid way to mix these signals? Do I need a different approach? Or did I just have misguided expectations in terms of the frequency plot of the mixed signals?