Hi

It sounds as if realband has not released the sound driver.
Asio normally can not support more than one app at a time.
Did you just minimise RB instead of fully close.

Switching pc of and on should clear.

If this was the cause set RB and Biab to different drivers if you do want to run them both at the same time.

Just my thoughts
Mike


BIAB2021 UltraPlus,AsusN55S1Tbssd, W10/64,Akai EIEpro
Yamaha CVP405,SquireStrat, CoolsoftVMidSynth
Novatation Impulse61 Ctr kbd, Cwalk blab Kontakt

http://mikesmusic.byethost16.com/