OK, I know there are no stupid questions, but this one has me believing I’m missing something basic.
Last night, I gigged with the AB168 attached to my QU-sb for the first time. I had NO PROBLEM with any channels 1-16 on the QU-sb that were being fed from corresponding channels of the AB168, since I correctly changed the source from LOCAL to DSnake on those channels being fed from the stage box. But I could NOT get, for example, input 15 on the ab168 to feed Channel 17 or any other of the (17-32) channels that are on my Ipad mixer but do not have physical inputs on the QU-sb. Those channels would remain listed as N/C, (Which I took to mean Not Connected). No matter what I did on the input matrix, moving “dots” and pressing apply, channel 17 would remain N/C.
What am I missing?