Boss SD-1 Super Overdrive 3 Settings for Metal Amp Boost

Three Settings for Metal Amp Boosting: 1) All knobs 1 o'clock: Zakk Wylde Style, my favorite setting for the SD-1. Does not only tighten up the sound but also adds nice grid and sizzle to make your tone more interesting compared to TS9 users. 2) Tubescreamer-Like boost for tightening up the sound. The SD-1 frequency spectrum change is different (i think the boost is at a higher frequency - plenty of information on this online) compared to TS/808 pedals, making it the better Tubescreamer according to some people (including me). 3) Level, Tone both at 1 o'clock, Drive 5 o'clock: Like 1), but with more Distortion added if you need a more extreme sound.