Buried in the hundreds of new features in iOS 5 is support for AVRCP 1.3 (or maybe even 1.4!), a Bluetooth standard that gives iPhones the ability to send artist, album and track name information to Bluetooth audio devices such as those in the stereos of some newer cars.
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iOS has been stuck at AVRCP 1.0 for nearly a year, and though the iPhone allowed control of the some music playback (back, next, play/pause, and volume up/down), the device wouldn't pass on information about what song was currently playing. In iOS 5, that all changes.
For more information, check out Wikipedia's page on the different versions of AVRCP and what, exactly, each version supports.
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Top Rated Comments
A2DP has been supported for a long while now. This is about AVRCP 1.3 (or 1.4), which allows for streaming of metadata, along with the basic set of audio controls.
Not that I've seen... I'm not even sure album art is part of AVRCP...
Does this mean I'll be able to browse my contacts on my Bluetooth stereo also? Right now, I can only see the number displayed when others call.