Burger behemoth McDonalds is doing a marketing deal with Sony to promote its download music service. Under the terms of the agreement buyers of Big Macs will receive a voucher for a free download, according to the Financial Times.

Sony's Connect service launched in May and goes head-to-head with Apple's iTunes service. It offers 500,000 tracks for download in Sony's own format for 99c each, or $10 an album. The tracks are playable on devices with Sony memory sticks. It is due for European launch this month. ®

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