op amp Twin T circuit noisy


Posted on Feb 4, 2014

It`s built on a breadboard and it sounds exactly how it should sound (damped sine wave, big 808/909-kind of kicks). However it`s noisy. I`ve tried adding a big electrolytic cap between V+ and GND. It makes difference yet it`s still very noisy. Also, the circuit tends to `buzz` when I touch the pots or a wire. Any idea how to kill that The whole circuit is powered from a split power supply from a switchable adaptor (I mean the op amp, the rest of the circuit is powered from 0-9V).


op amp Twin T circuit noisy
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