Those of you that've read this thread know that I recently acquired Digitech's Bass Driver pedal that I actually consider keeping. Anyway - while playing with it I discovered some strange sounds that can be heard on those samples: Bass Driver (disto) -> Marshall Echohead Bass Driver (fuzz) -> Ibanez PT9 -> Marshall Echohead It sounds like some octave up overtone, almost like a guitar playing some strange but musical high-pitched noises on top of bass notes. Is this normal for all distortions? Some distortions? Have any of you heard it before? If yes - which pedals were involved? And ofcourse - any general comments about the overall tone are quite welcome.