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In page Digital Audio Broadcasting:

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In 2006 tests began using the much improved HE-AAC codec for DAB+. Hardly any of the receivers made before 2008 support the newer codec, however, making them partially obsolete once DAB+ broadcasts begin and completely obsolete once all MP2 encoded stations are gone[citation needed]. Most new receivers are both DAB and DAB+ compatible[citation needed]; however, the issue is exacerbated by some manufacturers disabling the DAB+ features on otherwise compatible radios to save on licensing fees when sold in countries without current DAB+ broadcasts[citation needed].