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The Buchla 100 series' white noise generator (1960s), drawn in its San Francisco Tape Music Center panel: it "produces white noise with a flat frequency distribution from 5 cps to 20 kc and weighted noise with a constant power per octave distribution" (the 100 series catalogue). Two outputs give the flat noise, two the weighted (1/f) one.

Key features

• White noise, flat from 5 cps to 20 kc
• Weighted noise, constant power per octave (1/f)
• Two outputs of each