Make Your Own Ambient Audio Tracks for Video

When the right kind of electronic or ambient music is not available for your project, why not create your own?

Stretching a piano, guitar, or other single/double instrument song can sound interesting and tones and drones when done right.

Paul's Extreme Sound Stretch

To create your own custom stretched music tracks, check out Paul's Extreme Sound Stretch.  It's available for PC and Linux.

ZynAddSubFX (open source music generator)

If the sound of an enlongated song is not to your taste, another option is to generate your own instrumentation or chorus sounds with ZynAddSubFX.  It's an open source music generator for PC, Mac, and Linux:

a fully featured open source software synthesizer capable of making a countless number of instruments, from some common heard from expensive hardware to interesting sounds that you'll boost to an amazing universe of sounds.

Where to Find Free Music for Your Video Productions

incompetech.com
Music Composer Kevin MacLeod has posted over 2,000 songs that are completely free for personal or commercial use.
* Be aware that credit must be given somewhere; in your video, or in the video description.  Youtube videos using his music can be monetized.
* Can search tracks by genre or feel.
* most of the music used on Indy Mogul videos comes from this site.

JoshWoodward.com
Musician who does vocal and instrumental versions of his songs.
* About 170 songs available.
* Can cut between vocal and instrumental version of the same track for your video editing.

FreeMusicArchive.org
* Make sure to do a search that includes a filter allow "commercial purposes" so you don't accidentally use music that cannot be used commercially
* Over 3,000 tracks

RoyaltyFreeKings.com
* Scroll down to the bottom to see the free music available.

NoizeIndex on SoundCloud
* Much of their music is available with the Creative Commons attribution license

TheMusicBed.com
Songs are $30-40.
Good selection for making wedding films, or promotional videography with a decent budget.

Most of the links and information on this post came from:
The Ultimate Guide To Royalty-Free Music For Youtube! - Friday 101 - YouTube