Doesn’t the Onyx have a 24/96 FireWire interface? Is it your studio mixer of live mixer or both?
Curious why you would use a uTrack24 since all you need is to plug the FireWire into a MacBook and into Logic and record multitrack. In my case, my studio mixer is an awesome Tascam digital DM4800 with its own FireWire computer interface but it is absolutely not portable so I figured for live gigs I’d tap into the mixer of whichever sound guy we use as all mixer have inserts on each channel, and feed into a uTrack24. However, the Onyx 1640 seems fairly portable. Maybe same reason as me too big to move around.