OBS setup with Touchdesigner, Bitwig and [VB Audio Matrix](https://vb-audio.com/Matrix/)
TD Audio device out, using VASIO 64 A (1,2)
Bitwig using VASIO 64 B
audio in source VASIO 64B 5/6
OBS using VASIO 8
UMC ASIO as ASIO64A
VB Audio Matrix
connect VASIOA (out 1,2) > VASIOB (in 5,6)
OBS input to the VB Audio cables was muted in the Windows Volume Mixer