@mr_j said:

when i enabled a specific audio device to a specific channel, it does not show up as selectable on any of the other channels, whether it's enabled or disabled... which now makes complete sense

 You have no idea how many times I've also done this 😅

@bonemap Hi Russell I used to use Loopback but got into a bit of a mess as it seemed to play sound when I didn't want any! So I removed it to avoid complications. The Multi Output Device actually seems ok re latency when I have buffer set at 128 samples but it causes occasional digital distortion! I suppose I may try Loopback again. As you know I've been using your audio bloom effects which of course respond to frequency bands which I like. Thanks a s always for you expertise. Cheers, David