Is @Sensei Tim still active here? Maybe I should try the Master Effects main thread? I just tried the Super 300 with Input, Balanced, and Output all plugged in, in case for some eason that balanced output needs the primary Out to also be plugged in, and same scenario: All knobs at 12 o'clock, Level anything about 12 o'clock, and it becomes a self-oscillating synth, super weird. It makes me wonder if there's something fundamentally wrong with my pedal, since I've never really thought it sounded like all the good demos I watched/heard.