polyphonix
Reconfigured to defaults ... same ... routed to physical output on E-MU1616m ... same ... I have meter action on input and output but no sound ... and again the MIDI files from the Motif are playing back audio ... no problem ... just weird ...
So you're saying audio from both the Motif being echoed by audio tracks in SONAR and audio from recorded tracks is visible in Patchmix meters but only the Motif audio is audible? I don't see how that could be possible. I have to think the Motif audio is being direct-monitored, which it will be unless those input channels are muted in Patchmix. Are they muted? And if Patchmix is showing signal from the recorded tracks, and you're not hearing it, that has to be a routing/hardware/firmware/driver issue with the 1616m.
I'm inclined to suspect something is going on with the Win8 drivers from E-MU; are they beta?. All in all, it seems you have a marginally supportable environment with Win8 running on an XP-spec machine, and possibly beta interface drivers.
Was X2 ever working with Win8 on this machine or is it still installed and working?