Using an Arduino to switch instrument cable (guitar to amp) on/off ?

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Hi,

Using an Arduino, I'm trying to send a signal to a circuit to turn on/off (or mute) the signal between the guitar and amplifier. I see that they sell instrument cables with the on/off switch built in, but I am trying to imitate the same thing but having the Arduino send the signal.

What I have in mind is to create a pcb board with two 1/4" mono female input jack pcb mount (not sure which one - Guitar Amp Jacks ) and a digital potentiometer (Uduino.com - Using a MCP4131 Digital Pot with Arduino) to control (on/off) the signal flow thru the circuit.

Question - is this the best way of doing this? Any ideas or suggestions would be appreciated.

Thanks,
 
electric guitar raw inductive pickup signal can be very hi Z, sensitive to cable, preamp loading - hard to add a tranparent switch since frequency response and peaking varies with few 10s of pF, 10s of MegaOhm added loading

just the added C of another few ft section of cable, will have measureable audio frequency effect with the higher Z pickups

for actual switching some electromechanical relays can have low parasitic C


switching post preamp, buffered line level signal is much easier to do without affecting "the sound"
 
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