As described in a posting on Google+, Google users can "add up to 20,000 songs" that they already own to Google Play. Once saved in the "cloud," users can then stream these songs to Android devices and also to PCs "anywhere you go" at speeds up to 320 kbps.
The actual "scan and match" feature announced this week refers to Google's scanning of a user's music collection automatically, and "rebuilding" it in the cloud for free. This feature has been available in Europe since last month but has now been opened to U.S. users as well.
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