What medai are you playing when you experience this problem?
I've worked on two projects so far and it's happened both times. The first project was using ProRes source footage and then outside video assets were brought in that were H264.
Now I'm working on a project that is using Canon DSLR H.264 native footage and video assets that are in H264 and a few that are XDCAM EX.
Also using many still images but it seems as though it will happen randomly when I load a video clip into the Source window. The video clip will play with audio in the source monitor, but then when I bring it into the timeline this is when the entire system audio will drop out and mute entirely.
Still having issues with this.
I'll import some audio or video clip, bring it into the source monitor, scrub through a bit and then all of a sudden I lose all system audio. Have to restart premiere and force restart the System audio to get it working again.
Happens about 5 times a day when I'm working all day.
We are expriencing the same problem on one of our machines also.
Whenever we use Premiere Pro CC, system audio is muted and we have to go to "system prefrences", "sound" and toggle the "select a device for sound output:"
This is really a pain.
Mac Pro mid 2012.
Simply pausing and resuming play does not resolve this? I assume not, but worth asking in case you're hitting the issue discussed in this thread: http://forums.adobe.com/thread/1241741?start=80&tstart=0
Umm No... It actualy mutes system audio. Other applications will not play unless you toggle the setings in system prerfrences. Only happens with Premiere. Premiere mutes all other applications. It seems occurs as soon as you play a premiere sequence.
Thank you for your help on this form.
Reaching you all by phone is horrible.
Was on hold for 1 hour and 30+ minutes..
After a little more testing what makes the audio resume is focus. System audio resumes as long as Premiere has focus. Once you switch focus to another application or close Premiere there is no longer any system audio until you toggle the settings in system prefrences.