Low headphone audio with Mp4 playback

Trying to watch an Mp4 video and audio is extremely low on headphones. I tried using Quicktime, VLC, Flip player and iTunes and all are outputting almost inaudible levels of audio on my headphones with a characteristic underwater gurgling sound. But when I unplug the headphones, it plays the audio at a normal level over the speakers. All the videos played back with audio at normal levels yesterday on both headphones and speakers.
It doesn't seem to be a problem with the headphones since Youtube and Spotify sound perfectly fine.
Tried to change setups in Midi without any luck.
I have Air Parrot installed as a mirroring software, but it's never caused a problem like this before. I suspect it might have something to do with this, but even when I force quick Air Parrot, the problem remains.
Macbook Air 13", 10.9.4 OSX, can't install new operating system due to possible software incompatibility
Thanks!

Ok so I just tried a pair of earbuds and it's working fine...
Why would my nice headphones be selective of one program's audio over another...is there something I can do to change the output on my computer?

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Low headphone audio with Mp4 playback

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