Amie Street, an online music store that prices songs in a dynamic way, has raised $3.9 million in a second round of funding.

The company introduces new songs as free downloads and then raises the price as the songs are downloaded more often. As such, the site has been a distribution channel for independent artists. Deep Fork Capital was the lead investor. It converted a note from an existing bridge round and provided additional capital. The other three investors were not disclosed.

Joshua Boltuch told GigaOm that the funding was not a "down round" compared to its first round of funding in 2007. Amazon.com, which participated in the first round, was not a "major part" of the second round.