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Tue, Dec. 24th, 2013, 01:47 am
Video playback sound problem.

Originally published at VolkStudio Blog. You can comment here or there.

In the last week, I noticed that about 10% of Youtube videos play without audio in all three browsers (IE, Firefox, Chrome). For example, https://www.youtube.com/watch?v=ic4PQ-tnwJw plays fine but https://www.youtube.com/watch?v=bXhQNRsH3uc has no sound. I am not sure how to fix that. Vimeo plays music and sound effects but not voices (http://digg.com/video/the-history-of-aspect-ratio — I can’t hear any of the narration but music and SFX play just fine).

I re-installed Flash. Update: now it’s worse, and almost none of the videos have sound. Under IE, volume controls disappeared. In a lot of videos, music plays but voices either play extremely faintly (with volume at 100% in video controls, PC playback and on the speakers, I can barely hear them). Almost as if the playback depends on specific codec used by the video authors.

Stranger yet, known good tracks have functional instrumental music but the vocals are completely scrambled (https://www.youtube.com/watch?v=l1qc_zg2od0)

Tue, Dec. 24th, 2013 08:48 am (UTC)
vakhitov

Try this page: http://www.youtube.com/html5
By clicking the button there, you're replacing Flash with HTML5 for video playback on Youtube.

Tue, Dec. 24th, 2013 03:15 pm (UTC)
n0tqu1tesane

Have you checked your sound settings in the control panel? If you select the active audio device, then configure, make sure it's not set for more speakers than you have. Also, double check which port your speakers are plugged into.

It could be that you've got your sound card configured for 5.1 surround speakers, but only have stereo speakers plugged into the port for your surround speakers. This would explain why you're getting just some audio on videos that support 5.1 surround.

Tue, Dec. 24th, 2013 03:59 pm (UTC)
olegvolk

That sounds like the most likely cause of the problem. I looked at sound control panel in Wiindows 7, didn't see anything relating to surround sound info. Where should I look?