How many pedals were the 'L-Colour' and 'H-Colour' knobs used on, and do they act like a normal tone control or are they different? I knwo the HM-2 and HM-3 used them, did any others?
i think the HM-2 and HM-3 are the only two that have that feature. it acts like a parametric EQ. the higher you set the "low" knob, the more bass you get sorta thing.
the OS-2 has a "color" knob, but not for highs and lows.