By Lexy Savvides The streaming service has converted all of its 30 million-strong catalog to AAC format, offering different quality bitrates up to 320kbps for users to choose from.

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Source:: http://cnet.com.feedsportal.com/c/34938/f/645093/s/3f8a3a2f/sc/46/l/0L0Scnet0N0Cnews0Crdio0Eupgrades0Eentire0Ecatalog0Eto0Eaac0Eand0E320Akbs0Estreaming0C0Tftag0FCAD590Aa51e/story01.htm