I've started going through a lot of old recordings done in x2 and x3...maybe even earlier. I can't seem to get some of them to work. I try different variations of sample\bit rates. Is there an easy way to figure out how to get them to play? If I make audio changes, do I have to restart Platinum for the settings to stick? Kinda at a loss and clueless as to go about this the right way...any help or suggestions will be GREATLY appreciated!
 
Thanks,
David
 
 

Does "will not play" mean the transport won't run? Or it runs but you don't hear anything? Is the audio engine indicator 'lit' in the Transport module?
 
Bit depth shouldn't matter, and the MOTU's clock should switch to whatever sample rate the project requests automatically so long as it isn't slaved to some external clock source.

If your older projects were made using a different interface you might want to check your master output is set properly. My old M audio projects seem to change to my SPDIF output on the master and I gets me every time. 

I'll check these things when I get home...I get an audio playback error of sort...

If after you have tried the above you still have an issue, try opening in SAFE mode - if it then plays, there is an issue with a plug-in
Cheers
Nigel