Among the services are selling tracks, running fan clubs and calculating royalty payments.
Amazon, which opened its online music store in September, sells tracks without anticopying software locks for 89 cents to 99 cents.
In September, the company introduced the Amazon MP3 digital music store to sell tracks without the antipiracy technology known as digital rights management, or D.R.M.
So, when checking out online music stores around the Web, just make sure the service sells tracks in file formats your jukebox software can handle before you sign up and hand over any credit-card information.
The Apple iTunes store, the largest seller of music downloads, began selling tracks from EMI Music yesterday without any restrictions on copying, for a slightly higher price than usual, $1.29 instead of 99 cents.
Larry Kenswil, the president of the eLabs division of Universal Music, said that obstacles to clearing the rights for samples will prevent the company from offering several songs when it begins selling tracks from its own catalog online this fall.
Schneider says Android is performing well, but he'd like to see Google ramp up its music store to help artists sell tracks from within their apps, just as they do on iOS.
And in the process of doing so, help promote and sell tracks by real artists.
Young and Ready-Campbell created a mashup of BuySimple and SoundCloud to help musicians sell tracks across the Web.
The real story, as we understand it, is that SoundCloud users will soon be able to start selling tracks through the platform.
