Open Source Soundtracks
Remember, be sure to attribute any libre soundtracks you use to the original author either in credits within the video or the text released with the video (ie: youtube description field).
Here we link to a few cherry-picked songs/albums that are libre for commercial use.
- Welcome in the intox by Bluemillenium
- Guitar Quartet w/ Stems by Aussens@iter
- Falling (Suddenly) by Siobhan Dakay
- various pieces by Advent Chamber Orchestra
- The Four Seasons (Vivaldi) performed by John Harrison with the Wichita State University Chamber
And here's a few cherry-picked songs/albums that are libre but non-commercial.
The Internet Archive
We can search the entire IA for items licensed by CC-BY or CC-BY-SA (excluding any NC or ND items) using the following query
licenseurl:http*by* OR licenseurl:http*by-sa* AND NOT licenseurl:http*by-nc*
We can further refine the query by limiting to audio-only items by adding
AND mediatype:(audio) to the query:
licenseurl:http*by* OR licenseurl:http*by-sa* AND NOT licenseurl:http*by-nc* AND mediatype:(audio)
For better results, we can limit it to the collection produced by the free music archive by adding
licenseurl:http*by* OR licenseurl:http*by-sa* AND NOT licenseurl:http*by-nc* AND mediatype:(audio) AND collection:freemusicarchive
For example, https://archive.org/search.php?query=licenseurl%3Ahttp%2Aby%2A%20OR%20licenseurl%3Ahttp%2Aby-sa%2A%20AND%20NOT%20licenseurl%3Ahttp%2Aby-nc%2A%20AND%20mediatype%3A%28audio%29%20AND%20collection%3Afreemusicarchive
For more information about the cryptic syntax for searching IA by license, see this Internet Archive search guide
- Ccmixter.org hosts music freely shared by artists. The uploaded soundtracks are licensed under Creative Commons licenses, and most are Non Commercial.
There appears to be no way to search by license, so please see the above section for a few cherry-picked titles, separated by use for commercial or non-commercial.
- Jamendo -  - royalty-free access
- Type in Free Techno on Google - http://www.entropymusic.com/ and others
- RoyaltyFreeMusic.com - 
- MyMusicStream.com - 
- FreeLoops.com - 
- Guitar Improv from Lucas. Better than Madonna's Human Nature.
- DJBLUE - Mind Field -
- Awesome soundtrack - what is it? -