Hi,
I haven’t tryed recording audio though audiobus with 1.5.
But i can tell that when i’m using audiobus with jamup and cubasis, the level out of jamup (on the top right of the lamup screen) in similar to the recording level in cubasis. So I check check my recording level (in particular to prevent peaks) throught jamup and not cubasis.
I’ll tell you more about the channel meter behaviour ASAP