At 10:58 PM -0500 2004/09/11, J. Larry Hendry wrote:
>OK, I'm gonna step up to the plate on this because it has been something I
>have been thinking about for a while.
...
>So, that is my 2 cents on the subject. This would be a simple module to
>construct. Essentially if is a handfull of op amps wired up in the correct
>configuration. You put one of these next to a MOTM-190 and you have panning
>fading with maximum control in only 2U. And, you get to take advanage of
>VCAs you already own,
>
I don't mean to step on Larry's parade here, but I think this can
already be done with an Oakley Multimix and a bit of elbow grease. I
modified my Multimixes so that they can provide a variable DC bias to
any of the 3 outputs (-5V to +5V) if nothing is plugged into the
input. I also used Larry's normalising scheme so that the three
Multimix channels are cascaded. This allows the bias to go right to
the 13V limits of the op amps, if you need that much offset. Adding a
DC bias to the reversing attenuator function of the Multimix provides
quite a variety of CV scaling and biasing. It's great for turning
those +/- LFO signals into + only signals (and inverting them at the
same time). Plus, there's already panels and boards for the Multimix.
Details here:
http://www.tellun.com/motm/mods/oms902/oms902.html