AE 13.8.1.38
OSX 10.10.5
Same issue as many above. I currently am editing 600fps footage interpreted as 60fps. No effects and a single WAV audio track. During Preview, audio stutters and changes pitch. “Cache Before Playback” is checked. By checking “Mute Audio When Preview Is Not Real-time” audio cuts out during preview. It’s evident Preview is not playing back at real-time when cached.
Workarounds:
1) Using Tilde to maximize the composition window resolved the issue.
2) Checking “Fullscreen” in the Preview window resolved this issue.
These workarounds don’t apply to a Standard workspace layout. Apparently a bug fix was issued in 13.7, but did this address the bug in OSes prior to El Capitan?