Some musicians are insisting that only albums of their music be made available for sale through the iTunes Music Store.

Artists including Linkin Park, Radiohead, Madonna and Green Day, are concerned that allowing their music to be electronically distributed as singles will undermine their more lucrative album sales.

Billboard reports: "For artists who write their own material, the impact is even more substantial: Rather than collecting songwriting royalties on as many as 14 tracks, plus an artist royalty on the album sale, payment is being parsed on a per-track basis."

Artists see approximately 10-12 per cent of album sales