Me, too......
This intrigues me, too.....
A few months ago I got a Layla 24 with this very idea in mind -- sending more than just stereo or mono inputs to CEP while recording (submixes, effect only channels, etc.). Finally, I've gotten around to a project where I'm doing just that -- using inputs 3 & 4 as well as 1 & 2 at the same time. I check my Layla mixer panel and yes, it shows the inputs of 3&4 coming in, and I can HEAR it in the headphones, but I'll be damned if I can get CEP to record anything but 1&2!! I arm the tracks with 3left or right, etc. just as you would with 1&2, but no wave form appears-- 1&2 continue to work as usual. I'm assuming I just haven't selected this or that within CEP, as my soundcard seems to be working (hearing it in the headphones).
Any thoughts??
BTW, sorry to hijack this thread, but I'm dyin' to get to the bottom of this....