It will also keep them separate if you use a stereo cord (it detects which kind of cord is plugged in). It will also blend the two signals if you use a mono cord. I'd recommend the Fishman PowerChip which is an onboard preamp/buffer with a volume control for the piezo. If there's just a volume pot, it's usually a much higher value than a magnetic circuit, something like 1 meg ohm instead of 250K. Does your "on/off" switch toggle back and forth between magnetic and piezo, or is there a middle position that combines them? If you do have an onboard preamp, see if there's a trim pot on the circuit board that you can turn down a little. I might be confused by your title, but if you "blend" your piezo into a mono signal with your magnetic pickups you run into huge problems with impedance mismatch unless there's a buffer (something with a battery). I do not care how my guitar sounds through a PA or bass amp as I play through my guitar amps 100 percent of the time. I am new to this stuff so any info is much appreciated. Is the volume pot a 1.5M pot? Should I change it to a lower value? What would be the best way to create a gradual increase in piezo volume? The volume pot also has a 333 capacitor soldered to it. Even though it shows 0 when the volume is at 10 on the VOM meter the piezo is still clearly coming through loud and strong, it just has a slightly different tone. It starts at 0 very quickly jumps to 300 (1 on the volume knob) goes to 1580 (6-7 on the volume knob) and then tapers back down to 0 (10 on the volume knob). I put a VOM meter on the piezo volume pot to check out the values. However when I play through any and all guitar amps the piezo is overwhelmingly bright, even if the piezo volume is under 1 on the dial. When I run the guitar through a PA or a bass amp the piezo sounds very smooth and really brings forward a nice acoustic flavor. The piezo has a on off switch and its own volume. I have a custom guitar with two humbuckers and a piezo setup.
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