[LAU] Axiom 25: using pads with Hydrogen only (+ qsynth on keyboard)

Hello, What would be the best way to have the pads of an Axiom 25 trigger Hydrogen only while the keyboard itself would trigger qsynth ? Qsynth has sounds on all 16 MIDI channels and it seems that it's not possible to disable reception for a specific channel channel. Nor turning the sound down for a channel. Is this at all possible ? I can see an app that would be in-between qsynth and the Axiom 25 MIDI input that would filter out MIDI input for a given channel, does that exist ? Also, in qjackctl there are two MIDI outputs for the Axiom 25. 0:USB and 1:USB or MIDI 1 and MIDI 2. Conencting 0:USB to Hydrogen and USB:1 to qsynth could maybe be the way, but then the Axiom 25 would have to be told to send pads to 0:USB and keys to 1:USB, which I'm not sure it can do. The Axiom documentation has a lot of zones and groups and such, but there's no section on how to actually achieve some results, with examples, apart from very simple connection examples. Any comments/suggestions appreciated ! Cheers.