Op-amps in a guitar amp system

Some Guitar Amp Circuits
by John Maloney Pressure Transducer Preamp Measures vibrations Adjusts tone and caused by the strings volume of the and converts to an signal Tone
oscillating voltage Volume
signal R2 Max R1
+
V
supply Min Vn
Vp
Treble + Vout
Rf
C Vin Bass ‐
V supply