Connection to audio interface failed

I also use an Ui24R in band-context. I’ve learned from some other communities, and by own experience, that the Ui24R USB audio interface and the internal power supply for USB is designed quite poor.

I also had USB failures in the beginnig, because of mains issues (switching on/off power of the rehearsal room fridge, guitar amps, neon lights etc.) and some grounding issues (e.g. plugging active speaker wedges while running…)

What I did was inserting an USB isolator ( and a UPS on mains (

No more problems since then!