For a free option, go to www.reverbnation.com (see References below for a link). If you are already a user, sign in. If not, sign up for free.
See Resources for other fee-based websites that provide this service.
Once logged in, click on the "View Profile" button. Four tabs will appear under the ''Control Room'' user interface in this order: "Songs," ''Playlists," "Store" and '"Tunepeaks."
Click on the "Songs" tab, then click on the orange "Add Song/video" button within that section. The "Upload Song" pop-up window will appear. Enter the necessary information belonging to the song you wish to upload for future download and selling.
Browse and locate the song, and upload it by confirming on the "Upload Now" button in the "Upload Song" pop-up window. The song will appear on your playlist under the "Songs" tab. Repeat this process for all songs you wish to upload and sell.
Click on the "Control Room" button on the top of the page.
Click on the "Earn Money" button, which displays a "$" sign.
Select from the list of options to sell your songs. The "Digital Distribution" option allows you to sell music on recognized online music stores such as iTunes, Amazon MP3 and Rhapsody.
Choose the "Get Started" button to set up personal billing information. Note: Reverb Nation charges a one-time fee for album release, although it allows you to keep 100 percent of the royalties.