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Most videos on YouTube are loud enough and I can hear them perfectly well, but some have got the volume down too low even with the YouTube volume slider on max and the PC volume set to maximum too. In theory it must be possible to increase the volume, but does such software actually exist?

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3 Answers 3

up vote 10 down vote accepted

If you have VLC player, you don't have to download the video. Just open VLC → FileOpen Network, paste the YouTube URL and click Open. Doing this will stream the YouTube video through VLC, allowing you to use the VLC audio settings.

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One non-optimal possibility is download the video and then play it in VLC which has the ability to increase the volume up to 800% (using the mousewheel on the volume slider).

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THere is a better answer from @luiz –  Tomas Apr 4 '13 at 13:12
BTW, for me it only goes to 200%! I have installed the current version just now. –  Tomas Apr 4 '13 at 13:17
I'm also seeing a max volume of 200% using VLC version 2.1.5 on OS X. –  Dennis Wurster Mar 20 at 20:23

Presumably flash is accessing you audio at the driver level so the only change you could make would be there i.e. using a driver that lets you route the audio through processing (It might be worth looking into this http://jackaudio.org/ I'm not sure this will do do the job).

Perhaps HTML5s video tag will open up the ability to do this sort of thing with a JavaScript or a browser plug-in

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