I'm not sure what I've done (or failed to do)... I have a full compliment of tracks coming through my monitors (routed through SPDIF) and my studio headphone mixes are working through the matrix as they should... but in playback through the headphone jack on the FF800 I'm "missing " tracks...???

everything is routed to SPDIF, the "stems" for the headphone matrix mixer are sent through mono analog outs... in the FF matrix, I've tried checking all inputs for headphones out.... faders are up in the mixer... but a few tracks are still MIA in the FF800 headphones... and ONLY in the FF800 headphones

any ideas???

Thanks