The DRM protection prevented customers from listening to music on unauthorized devices and limited the copies they could burn onto CDs.
The company facees competition from Amazon.com Inc., which charges as little as 79 cents a song – with no copy protection.
While record labels liked having DRM, they also wanted variable prices, letting them charge more for popular songs.
Apple has also disclosed plans for songs to be made available will cost 69 cents, 99 cents, or $1.29 starting in April, with most albums going for $9.99.
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