Could not start playback
I'm having a problem to playback the raw video file and when I drag it to the timeline as is I can not hear the sound. I had the same problem last time but I thought it was my hard drive because it crashed. So now I bought a new hard drive and there was no editing problem it has been working fine I'm almost half way done with my video but then now when I download any media file whether its a wav. file or mov. file it could not playback. Any suggestions on what I should do?