MSN gave independent record labels a preview of the service

Microsoft will launch the store this autumn via its MSN service in the US, but it would not say whether it planned a sales or subscription service.

It unveiled the service at the South by Southwest music conference in Texas.

Retail giant Wal-Mart is also launching its own US music download service after a three-month test, offering songs at $0.88 (�0.48) each.

'Neglected'

Independent record labels were given a private preview of what Microsoft plans at the Austin music conference.

"Other companies took a different route and did not engage with the independent labels early in the process," said MSN product manager Christine Andrews.

"We heard that the independent labels did feel neglected a little bit.

"But, more importantly, we want to deliver a site that is great for artists both big and small, and great for the consumers too."

She said it was too early in the development process to reveal MSN's pricing plan or catalogue size.

Users will be able to download songs in a format that will play on most portable players and personal computers - but not rival firm Apple's portable iPod player.