Indie music download site AmieStreet is taking its variable pricing model for digital downloads to ringtones, through a partnership with ringtone software provider Myxer. Like the full-song downloads available on AmieStreet, all ringtones will start out free, and gradually increase in price as more people buy them. The price caps out at $2.

AmieStreet caters exclusively to independent and unsigned acts, and sells all music free of DRM. Through the partnership, Myxer will create the ringtones for each participating artist, and manage the distribution of the ringtones to customers' mobile phones.