I'd like to know what are tonal differences in OD pedals which use OpAmps versus those which use transistors? Why do most transistor OD pedals use germanium transistors instead of silicon parts? Also which popular pedlas use op aamps as oppossed to transistors? I know my Timmy and Keeley TS-9 use ICs. I THINK my Gaspedal Carb and Skreddy Screwdriver use transistors. I'm curious about my Barber Pedals (LTD, DDSS and Small Fry) and my Fulltone FD-2. I've noticed that the pedals that use use transistors tend to use germanium parts as oppossed to silicon transisitors. From my EARLY engineering days (almost 30 years ago) I remember that a) germanium transistors have a lower bias point and 2) most op amps use silicon. Does these play a part in the tonal equation? So pedal techies please help me out here!