Signal Chain problem A-B switching

Discussion in 'Effects [BG]' started by Jay Corwin, Jun 11, 2019.

  1. Jay Corwin

    Jay Corwin Supporting Member

    Jan 29, 2008
    Sanborn, NY
    Sorry for the not so great pic of my setup, but I'm doing this from my phone. Here is my issue. I'm setting up a rig to play upright and bass guitar. The AB switch I'm using is just an old mechanical DOD passive box.

    Everything works except for one quirk. When I switch over to the bass guitar channel, I'm getting this weird bleed through from the UB channel. It goes away if turn the HPF filter off. If I don't it sounds like a theremin, and responds like one if I adjust the frequency.

    Any ideas? Should I just get another switch?

    Screenshot_20190611-185208_DrawExpress Lite.jpg