an idea ...

[Rob Hukin]

>  Basically for LED thing to work, you need a memory location that always
>  matches the current knob settings - and it's just used for a reference.
>  The knob CVs constantly update this memory location (call it the
>  knob-buffer). The output CVs always come from a single memory location -
>  the edit buffer. When you select a patch the patch is copied into the
>  edit buffer. The settings of the LEDs are done by comparing each edit
>  buffer value to the matching knob-buffer value. Whenever a knob moves,
>  the knob-buffer AND the edit buffer are updated with the new value! When
>  the next cycle is done to compare the values, the LED will go on for this
>  knob because the two values will be the same. I don't knob, maybe all
>  these extra outputs for the LEDs wouldn't be worth it....

This sounds overly complicated. Why not just use a 'bulb' driven from knob
voltage minus stored voltage; off = matched, bright = far away and dim =
nearly there...

rob.