YouTube TestTube: Replace Your Audio with Licensed Content
YouTube has just launched its new TestTube site, which allows you to test out beta features that haven't been fully deployed. One of these new features is "Replace Audio", allowing you to sub out the audio track of your YouTube video with a licensed track.

Here's how to do it:
- Point your browser to the new testtube site.
- Select "Audio Swap" from the choices on the right side of the page.
- Read about "All About Audio Swap" and click Try AudioSwap.
- Select the video whose audio you want to replace and click Replace Audio. A genre-based browser opens.
- Use the browser to select different genres, artists, and tracks. When selecting a track, the audio automatically previews in sync with the video.
- When you're happy with your selected audio, click Publish Video. YouTube will replace your audio with the new song. You cannot undo this action.
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Read More Entries by Erica Sadun.

Ok youtube allows you to replace the audio in one of your videos BUT! I wonder if its cool to play the licensed music in the background in your video like on an ipod or like testing speakers and radios and stuff like I do with songs or do they only allow you to replace the audio
i think this is great but they still dont have enough good songs but ive made a list based on my favorites of their selections and i may use those songs in my future vids
1) you can't tell how long the song without actually previewing it against your video. If i could tell how long the song was it would greatly reduce my selection process
2) the song selection sucks. Also the songs they've gotten permission for do not work when you have short videos (under 1:30 or less, which most of mine are)
3) there is no option to edit the audio to match the stuff going on in your video, or to use more than one song, etc.
I could go on and on.
I think this might be popular among the people who make their own fan videos and have been cautioned about music violations
Also it works nicely for people who do essentially silent screencasts who want to *add* music.
That's great for "Dark Side of Oz" mashups, where the cuts and imagery in the video happen to match up with key words in the audio, but it seems like the sync would be unrelated in most cases. Still, it could lead to a bunch of happy accidents. Do you see a more practical application?