[Sean Bowers]

I had this same problem. In fact, I came across your post looking for a fix to this issue. I did figure out a fix that worked for me.

I simply uninstalled the current version of QT (7.6.5) and installed a later version (7.5.0). You will have to re import your clips, but the audio did play at the correct speed after the install.

This is were I got the earlier version.

https://www.oldversion.com/download_QuickTime_7.5.0.html

A while back I had to use a similar trick to stop After Effects from crashing while rendering. That’s what gave me the idea. Hopefully I won’t get any other problems…