found out today that my Voluum doesn't support SysEx. That is, I first tried to send SysEx messages coming from Cubase using Voluum as USB-MIDI Interface through the Voluum 5-Pin MIDI Out to my ProStage Remote Wah. Didn't work. When I used my RME Interface instead, it did work. However, connecting RME MIDI Out => Voluum 5-Pin MIDI in and Voluum 5-Pin MIDI Out => ProStage MIDI In, again it didn't work; though CC data was going through perfectly.
From the "Nixie" thread in this forum, I understood that currently Voluum doesn't support SysEx being sent from USB MIDI to 5-Pin. But obviously, also in 5-Pin MIDI thru operation, Voluum filters SysEx. This is BAD; at least for me, planning my new board with MIDI chain: DMC3XL => Boss ES-5 => Voluum => ProStage Wah => Timeline => M5. I would have to constantly recable the ProStage for preset editing, and even the DMC3XL may send SysEx stuff to the Timeline that would get swallowed on the way.
So, it would be great if you could fix the "5-Pin MIDI thru filters SysEx" in the next software version. Of course, also SysEx transmission between USB-MIDI and 5-Pin MIDI would be great; from the "Nixie" thread I understand that this may be a bit difficult to implement, and users didn't ask for it yet ... well, I do

In general, I love the Voluum + ProStage Remote Wah combo

Best wishes
Sascha