As I mentioned in another post, my only frustration with the Rev2 has been trying to get a volume pedal to work. I tried different polarity pedals, including the one that I use with the '08. With the '08, setting pedal to volume is a Global function, but this doesn't seem to be the case with the Rev2. No doubt, some musicians will prefer to set up the volume pedal functions independently for each patch- some for volume and some to control filter cutoff or something else. But to me, making the default for volume makes obvious sense. I didn't find this the case for any patches, nor could I get the expression pedal to work for volume. I went to the modulation matrix to route the pedal to control volume. The closest that I got was that if I set the amount to -128, it worked the opposite way: if the pedal was rocked back, it would be full on and then it would get quieter as I moved the pedal forward. But when I changed the amount to 128 (or anything else) it did not control volume effectively.
Now that I have dumped my '08 patch banks into the Rev2 and am attempting to control an '08 module with the Rev2, I noticed that when I use an expression pedal in the Rev2, it opens up the filter on the slave. After unplugging the pedal and MIDI cable, the filter remained cranked on the slave... even after the slave was powered off. This also happens when controlling a Tetra. In order to remove the offending brightness, I had to reattached the MIDI cable and pedal and then backed off the pedal... and then unplug the pedal.
If anyone has the expression successfully working to control volume, please give me the steps you used.