[rtcstudio]

Sometimes, usually after I import some additional audio, some audio tracks just stop playing back.

The meter will move like there is audio, but you won't hear anything. Voice shows assigned. You can solo it...no sound.

Only two ways I've found to fix it. One is to save the session, close Pro Tools and reopen Pro Tools, then reopen the session.

The other way is to go to an offending track and just select the output it's assigned to and assign it again (to the same output works). This resets it and it plays again.

I searched but the only thing I found was a similar thread in Pro Tools 9 a couple years back.

Mac OS 10.7.2, Pro Tools HD 10 (using TDM Expansion chassis with OMNI HD I/O and one blue 192 interface)
Mac Pro dual quad 2.66 Ghz (8 core), 17 Gig RAM
HW buffer 512
Host Processors 8
CPU Usage 90%
192 voices (6 DSPs)
Delay Comp Long
Disk Cache 12 GIG (maybe I should lower this....)
DSP Cache is off