It was only to test my live setup (here PA is replaced by 2x HS50M studio monitors)
Basically, I use a Cymatic LP-16 for the backing tracks and for switching automatically my rigs. I plug it straight to the Kemper which is also used a mixer. The KPA plugged in the Yamaha HS50M. I also use my MIDI pedalboard as a rig switching backup.
Voila