TL 072 and TL 071 opamp guitar effect integrated circuit based on the “rate, depth” setting can be done with a 12 volt dc adapter can run Total harmonic distortion: 0.1% at 100mV in and @ 1kHz Signal to... Electronics Projects, Guitar Tremolo Effect Circuit Opamp TL072 TL071 "audio control circuits, " Date 2019/08/02