[sdiy] Noise Engine Schemo

[Michael Ruberto]

Very pleased with this circuit. Peak to Peak output voltages are a few volts 
apart between the 2 outputs, but they sound the same amplitude to the ear. 
T2 can be a panel control but you'll have to limit it's range with some 
resistors. The pink noise switch will introduce a nice pinkish noise but is 
highly dependent on the setting of T2. With T2 at certain settings the pink 
switch will just amplify lower frequency artifacts and create a sound much 
like a worn record.
T1 has a sweet spot. View U2 pin 6 on the scope and adjust till the bottom 
edge of the signal is centered vertically. Without a scope adjust T1 till 
you get a good noise level from the Dirty output.

http://frankentron.freezope.org/source/Noise_Engine_REV1.gif

Enjoy

M. A. Ruberto