11R SPDIF to MBox 3 Clock Question

[jimst57]

I'm starting a new thread because the one I started yesterday was too general. I've got it working now except for one problem that I'd like to solve.

I'm connecting a 11R to a MBox 3 through SPDIF.

It works this way:

MBox 3 main interface
Clock set to external SPDIF

11R connected SPDIF
Clock set to internal.

I set up a track in Pro Tools, set input to SPDIF...all is good. I can hear and record guitar through the 11R.

The problem is I want to use the internal clock of the MBox 3 because I believe the A/D conversion in that is better, and the clock is a part of that.

But If I set the MBox 3 clock to internal and the 11R to external/SPDIF I get no guitar sound.

Is this normal or am I doing something wrong?