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TL 022 > 4558
2SC 732 > 2sc 2240 > 2sc 1815
2SK 30 > 2sk 118
1S 188 > 1n 60
S5500 > 1n 4007
4013 ou 4027
IC1/IC2/IC3/IC7/IC6 buffer, boost and "square up" the incoming signal then divide the
fundamental of the incoming frequency by 2 and by 4.
IC5b (pins 5/6/7) mixes the incoming signal and the 1/2 frequency square wave from the flip-
flops. This signal is then fed to IC4b (pins 5/6/7) which is a low pass filter/buffer. IC4b cleans
up the signal and feeds it out through VR1 as OCT1.
IC5a (pins 1/2/3) mixes the signal coming out of OCT1 and the 1/4 frequency square wave
from the flip-flops. This signal is then fed to IC4a (pins 1/2/3) which is a low pass filter/buffer.
IC4a cleans up the signal and feeds it out through VR2 as OCT2.
TL072, LF353P, NE3552 and the RC4558
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