It is possible to control JamUp with the DIGITECH GNX4 ??

Hi guitarrex,

You won't be able to map those sysex strings to CCs with the current version of MidiBridge but you could map the program changes. I don't know the GNX4 at all but if it can be configured to send out program changes when you press a button you could trigger the CC on or off.

Are you sure it won't send out CCs? It has an expression pedal on it and surely that must send out a CC?

Assuming the buttons are setup to send out program changes 0 to 4, then you could use MidiBridge's Stream Byter to convert them with rules like this:

# GNX4 but 1/2 to
# jamup CC 22
CX 00 = B1 16 7F # CC 21 on, CH 2
CX 01 = B1 16 00 # CC 22 off, CH 2

But the problem you are going to have is that jamup will see those program changes as well and change presets so you need to make sure that they are being sent on a different channel from the GNX4 than what jamup is configured to (rules assume jamup listening only on channel 2) and the rules above need to take that into account.

It's likely to be a bit fiddly. I'd look into whether it is possible to setup the GNX4 to send CCs on the pedals and eliminate that first before resorting to this.

Regards, Nic.