Troubleshooting unwanted distortion in a DIY guitar effect pedal? Answered
I built myself one of Moosapotamus' Bass Paraloopers following his design (the updated one, that is) to the letter. The only modification I did was to remove the low pass filter, since I'm using it for guitar, not bass. Unfortunately, it has several problems.
The one I am most concerned about is some unwanted distortion. It is fairly mild, but noticeable enough to be a problem when playing clean. It affects both the dry and wet signal (i.e. it is present when the blend knob is set to both 100% wet and 100% dry). I do not think the signal from the effects pedal in the loop is overdriving the circuit. How can I narrow down where/what component this distortion is coming from? Unfortunately, I do not have an oscilloscope to use for troubleshooting. Any help is appreciated.