Hi Paul! This is very interesting. I just kinda fell into my workflow and didn't realize it was uncommon until a few years ago helping out another BIAB user.

In my workflow, I keep BIAB and RB and my DAW (CW by BL) open at all times at the same time. I can switch between the applications moving bits and parts between them and playing those parts in either of the applications. There are times that I play over a few bars in both applications at the same time just to see if there are any differences or to see the changes that I made.

As I mentioned, I just stumbled on this ASIO multi-client capability and assumed that all interfaces could do this. Where I first saw this was helping a fellow BIAB user telling him to open both BIAB and RB at the same time. He was using a Focusrite 2i2. He could open and use BIAB or RB but not at the same time. Perhaps the difference here is that his Focusrite unit was an earlier Gen 1 unit, perhaps that has since changed.

Nonetheless, having a true multi-client driver has become so ingrained in the way that I work, it has become the deciding factor in looking at any audio interface.

I'm not so sure about using VLC as I'm not sure which types of drivers it can use, but if you have a minute could you confirm that you are using the Focusrite ASIO driver only in both BIAB and RB and then open BIAB and RB at the same time. Load up a song in each one and hit "play" in each one. Is each application playing its song?

I know for this little test it will sound crazy...playing two song at the same time. But if it works, it sure opens up possibilities in your workflow that are now firmly ingrained in mine and perhaps yours.

Appreciate your help and insight.

Jeff

Win11, Intel i7 7700K 4.2Ghz, 32Gb RAM, 2x1Tb HD, 500Gb NVMe, BIAB/RB 2025, MOTU 828MK3 audio, MOTU Midi Express, Yamaha Montage 7, DX7II, TX802, Motif XS Rack, Roland Fantom XR Rack, Oberheim Matrix 1000, VoiceLive3 Extreme, Kontakt 6, SampleTank 4.3