what is the number of input and output channels on setup/settings? is it "(default)" ? maybe if you set output channels to 4 it will do, but... however, this kind of issue is suspciously related to that specific device alsa driver capabilities and not much related to jack's per se.
what is the number of input and output channels on setup/settings? is it "(default)" ? maybe if you set output channels to 4 it will do, but... however, this kind of issue is suspciously related to that specific device alsa driver capabilities and not much related to jack's per se.
cheers