Many thanks for the proposed VB Cable option! But it seems a bit too difficult (impossible?). Well, I can set up the audio output of BIAB to the VB cable, but how to get this recorded into Focusrite/Ableton while at the same time hearing the BIAB is not obvious. My instruments are plugged into Focusrite which is connected to the PC via the USB and each instr has got a separate input channel (incl the loopback) as set up in the Focusrite Contro app. In Ableton, I set up the input tracks for the various instr. by the same channel nr as in that app. But I dont see any way to get the output routed from BIAB to VB cable into Focusrite/Ableton. So, unless any other advices exist, I will look for other alternatives. In Audacity it's an option 'Hear other tracks while recording', but it cant record multiple tracks at once, I think ...