I just have the P2500, so I don't have pads--and never played a CS. Just wondering if there are parameters in OS 2.0 that related to the pads--sensitivity, curve, etc. or if they show up as a source in cords.
Hmmm:
"The velocity and pressure-sensitive keypads can play on any MIDI channel as programmed in the Controllers menu. They are normally set to play on the “Basic” channel, which means that they play the preset currently showing in the preset view screen. The keypads output channel (mono) pressure internally (routed in the PatchCords) and both channel and polyphonic pressure over MIDI."
Maybe that helps explain what's going on. Possible workaround: route pads out and back in. Can some DC be added to the destination for something so whatever is being affected doesn't drop so much.
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There's a menu in the controllers menu where one can select one of four response curves as well as off, both for the channel and polyphonic aftertouch generation. I've tried various combinations of parameter values but none of them cures the problem.
A more detailed description of the problem is that when pressing on the pad the aftertouch value increases as the pad is pressed, but after holding it for a fraction of the second the aftertouch value drops back to zero again. Sometimes if I release the pad fast enough there's another surge of aftertouch as it released.
The impression I get is that there is something wrong in the sensing circuit somehow. As an electronics engineer I would characterize it as an otherwise DC level from the sensing circuit being filtered through a capacitor so that it's only the change in level (i.e. the AC component) that appears as a signal. I don't feel like reverse engineering the front panel circuitry (probably a major task) though especially since I don't know if that is fact the problem.
I haven't checked the MIDI output to see what type of data is actually sent though. I should do that.
/Ricard