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Mark, Can you try the new EDP with a regular, passive volume pedal with a mono cable instead of TRS expression pedals? Maybe the newer EDPs are less tolerant? Kim's Echoplex pages recommend the Boss FV-50L pedal while sounding a little surprised that the EV-5 worked: http://www.loopers-delight.com/tools/echoplex/FAQ1.html#FBpedal http://www.loopers-delight.com/tools/echoplex/echopedals.html#feedback To build or modify a pedal for EDP feedback, http://www.loopers-delight.com/tools/echoplex/echopedals.html#custom says to use a 20k ohm or greater pot between tip and sleeve. For your old unit, these links might explain heat-induced weirdness. If it is pre-1997 vintage you might need to clip an IC pin http://www.loopers-delight.com/tools/echoplex/FAQ6.html and for pre-mid-1998 models, the power supply's voltage regulator can be updated to run much cooler according to http://www.loopers-delight.com/LDarchive/200012/msg00235.html and http://www.loopers-delight.com/cgi-bin/wilma_hiliter/LDarchive/199807/msg00036.html hth, Nick Mark Hamburg wrote: >Not that there's time, but do we need a session at Loopstock for not >entirely healthy EDPs? David will just have to fly out, I guess. ;-) > >My problems: > >* New unit (I've had it only a couple weeks): It really doesn't like the >Roland EV-5 as a feedback pedal. My old EDP works just fine with the same >pedal. The range was really wierd (to the point of not being usable) but >it >didn't seem to have as much trouble with my Yamaha expression pedal. For >now, I've been driven to using my FC-200 to control my EDPs (a set up that >I'm trying to get attuned to before Loopstock). > >* Old unit (purchased in 1998): I demonstrated last night that having a >little too much heat in the rack can result in really bad noises from the >EDP. The unit was sitting on top of a Korg AM8000R and my guess is that >there just wasn't enough airflow. I've rearranged my rack and I'm keeping >my >fingers crossed, but I was muttering to myself last night as the problems >started that I must be cursed. > >Mark > >