Thanks for the advice guys but I went out on a limb and ordered said pedal. It arrived today so I plugged it in, dropped to D, and an awful tremolo type of effect was noticeable. So I went onto YouTube to see any reviews, low and behold the guy (or gal) who was doing the demonstration was using an Epiphone Jack Casady signature bass, just like I play (although mines white) and there was no tremolo effect coming through when the pedal was activated! Any ideas as to what I'm doing wrong?