The exported file sounds accelerated when played back in any player

[GUIMME]

Hi guys, 
I was recording a multitrack session with only 2 tracks (musical playback e voice). Everthins wal ok until a export a mixdown file and play it back.
It was accelerated, about 20% percent faster, just like "cartoon voice". But, when I playback the session in the timeline, it was ok. So I decided to restar my Macbook and after the restart and opening the session again, the session palyback became faster aswell.
I have never had a problem like this. I think I lost the recording material, cause I don't know if there is a way to solve this mess!
I appreciate any help. Tks

[SteveG_AudioMasters_]

Insufficient information, I'm afraid. Chances are though that there's a session file error. If you can open the original file in Waveform view and it still sounds okay, then you haven't actually lost anything - the session information is only about how a file is played - it doesn't alter anything about it.

[SuiteSpot]

As SteveG says it is unlikeley that you have lost anything but it does sound to me like the audio interface playback sample rate is not the same as that of the media file.

ie one is 48k and the other is 44.1k

[SteveG_AudioMasters_]

I wondered about a playback rate issue, but that would only make 5% difference, not 20%, and wouldn't really sound like a 'cartoon' voice. The other option of course is accidental stretching instead of dragging; not exactly unknown...