Just wanted to add something regarding mono tracks
If your making your tracks yourself this isn’t such a big deal as you can make necessary adjustments in your DAW
BUT
If like a lot of cover bands and you purchase your tracks from Karaoke-Version.com, then these files are STEREO
Routing a stereo file out to a single mono input will lose the intended mix and alter the tonality and placement of instruments
Essentially you would need to remix most instruments and lose a lot of the intended sound,
It is possible but understand this needs to be done
Sending out the Mono outputs will not be the same at 0db as a Stereo track at 0db
The best way until more Stereo Outs is added to Stage Traxx (this needs a audio engine revision so likely to be version 3.8) is to pair them to suit the band/performer
With the exception of Click and Bass (you could use one Stereo out and Pan these if you want this in Mono)
For example CLICK 1/2 panned R
BASS 1/2 panned L etc
Then group your instruments to suit your needs best
Drums 3/4
Keys and other 5/6
Vocal 7/8 etc