I have installed After Effects for my pc (windows 10 64 bit) and I keep on coming across this issue when I am RAM previewing.
All audio in the composition plays faster than regular and finishes about 2 seconds into the previewed clip. When I hold Ctrl and scroll along the timeline the audio is expressed normally, and after restarting AE, and restarting my computer the problem is still occurring.
If you know any possible reason for this issue, or a resolution please let me know.
What is your full version number of AE? Is it 13.7.0.x?
What format and codec is the footage that you're previewing?
Is it part of a dynamic link with Premiere or is it imported directly into AE?