One thing worth mentioning - Beads has a built-in autolimiter that, if no sound comes in for 1-2 seconds, it'll start automatically raising the volume level of the input to try to catch whatever it can detect. Unfortunately, that includes ground noise in many cases (it's super sensitive). Take a look at the Background Hiss/Noise section of the manual, Émilie provided the ability to disable the auto gain circuit and adjust it manually behind a button-knob combo.