Vivendi's Universal Music has said it is to test the digital sale of songs from artists without the customary copy-protection technology.It will allow the sale of thousands of albums and tracks available in MP3-form without the protection, known as digital rights management (DRM).Most major recording studios insist music sellers use DRM technology to curb online piracy.Universal artists include 50 Cent, the Black Eyed Peas, and Amy Winehouse.Universal said: "The experiment will run from August to January and analyze such factors as consumer demand, price sensitivity and piracy in regards to the availability of open MP3s."
