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Question When I use use my Polytune pedal on the crunch (hi-gain) channel I get a sound that sounds like an ocean wave or static when the LED lights come onto the display. What's going on

Answer
It's possible -- depending on the setup -- to get a bit of LED scanning noise when using a lot of overdrive/distortion. This is fairly common with tuners and nothing unique to the PolyTune. However, there are a couple of possible solutions:
  1. Don't use overdrive/distortion while tuning;
  2. Use an isolated output from your power supply power supply to PolyTune (and ONLY the PolyTune);
  3. Use a battery to power the PolyTune instead of a power supply.