old technics amp sux77

[trigstig]

can anyone help, im trying to recreate a circuit i thought real interesting, it was used in technics su-x77 amp i had once,maybe in other makes as well back in 1986.
the volume control was a potentiometer,but, clocked a micro when you turn in either direction. all i remember was it had 2 flip flop and something like 100mh inductors, plus some other bits. does any one remember this circuit or how it might work. when you turn one way one flip flop would pulse turn the other way the other flipflop would pulse, i think they were d type flip flops.
can anyone shed some light on this for me