I have had a 2880 for awhile & typically have used it with a bass, guitar & pedal steel. I had all of these three run through a custom 3 way switch to select which instrument (a/b/c) goes to which output (1/2). I could send a signal to the 2880 & with the same instrument or a different one send a separate signal to the mixing board.

That all worked fine.

Here is the problem.

I purchased a doubleneck Carvin 6/4 guitar/bass & rewired it so that both the bass & guitar can be played at the same time, each with their own output jacks.

If I plug them both into the 2880, one in the L in and one in the R in, the 2880 only functions in mono. No matter which instrument I am playing it send the output & the loop output through the Left channel to the mixer.

Is there any way to keep the bass & guitar signals separate? All of that audio in one channel on the mixer really makes for a lot of mud.

**When I say mixer, I mean mixing board…a Mackie 1403VLZ**

Thanks for any help.