I uploaded the same 1440x1080 mp4 file on youtube and Vimeo (only difference is that the one on Vimeo is shorter in duration, since I'm still testing) but the quality of the voiceover is different on both sites.

The VO on youtube sounds slightly muffled:


The VO on Vimeo sounds comparatively better:
http://vimeo.com/14350822

Is youtube encoding the audio differently?

Here's the MediaInfo for the audio stream of the mp4:
192Kbps, 44.1Khz, 2 channels, AAC (version 4) (LC)

Thanks.