The AirTrash is a pedal for guitar or bass that sounds like absolute garbage. I was breadboarding an idea and happened upon some absolutely sickening sounds, like really bad, but couldn’t stop playing it. I spent a lot of time trying to refine and improve it, make it less noisy, more controllable etc.. but these changes always ended up sucking the fun right out of it so decided let it be the simple disgusting beast that it is. It “works well” with guitar or bass and usually sounds best with the guitar or bass plugged straight into it (first in the pedal chain), didn’t do much for me at all on synths or drum machines. It’s very sensitive to pick attack and input volume. The blue knob controls the output level. I could not come up with words to properly describe what the red and yellow knobs do so I created those little icons in an attempt to illustrate what words could not describe.