Hi Max,
If you are storing a show via SQ-Drive and playing background music via USB-B, then yes, the music will be interrupted.
This is because the SQ-Drive and USB-B share the same internal hardware.
When you store a show with USB-B enabled, you will see a pop-up to explain this is going to happen, so you don’t interrupt audio immediately!
If it’s the other way around and you are sending a show to the SQ, then you will be re-configuring the core, which will interrupt audio as this requires the core to be rebooted.
Storing a show whilst a band is playing or the show is in progress is not as common as storing a scene (which would cause no audio interruption at all). Saying that, storing a show will only interrupt control and USB audio as above, so even then it’s only background music you’d need to consider, and as the background music is presumably not playing whilst the band is – there should be no issue here either.
Cheers,
Keith.