Got a bug report for you here I think. I have multiple clips in a timeline, some clips I can hear audio, other clips I cannot hear audio. I have been using Premiere Pro for 10 years. So, you can skip the questions like, "is the track turned on", or "is it one side of the channel that's not playing". what I can tell you is that it's random. Sometimes the audio comes through, sometimes it doesn't (on the same clip). There are wave forms for the audio in the timeline. And not matter what audio track I put it on, it doesn't fix itself. And like I said, it's random. So, a clip works fine one time, then later when I'm going over the same clips, I can't hear audio on it. Any ideas?????
Check your audio driver.