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I'm trying to make my windows computer a valid output for bluetooth audio from my phone. Enabling the actual audio was easy enough using the winrt AudioPlaybackConnection, but I'm trying to get metadata working and running into dead ends in the Windows UWP documentation. I'm familiar with the MediaPlayer class, but I can't see how to set the source to the AudioPlaybackConnection. My next thought was to create a MediaPlayer and handle the controls/metadata myself, but I can't see how to access the metadata for the AudioPlaybackConnection either. I tried getting the BluetoothDevice matching the same phone since I see the properties for the actual device list AVRCP Transport and A2DP SNK as two separate hardware "devices" making up the phone device, but I have no more luck accessing metadata with the BluetoothDevice. I know Windows 10 supports Bluetooth's AVRCP and can handle metadata/controls (source), but I'm beginning to think it's under a different device in winrt and I don't have the winrt know-how to track it down.

Shawn
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  • Why do you want to create a `MediaSource` object in your window client? The `AudioPlaybackConnection` just receives the data, if you want to control the playback process, you will still have to do it on the phone. – Roy Li - MSFT May 31 '22 at 06:11
  • The Bluetooth spec for music playback includes metadata transfer and remote control of the playback using AVRCP, which windows supports, so I’m trying to display a window that shows the now playing info and allows playing/pausing/etc. The same functionality is built into elementaryOS, which I dual boot, so I’m just trying to get an equivalent on windows. – Shawn May 31 '22 at 14:37
  • So let me clarify the question, now you want to use Bluetooth API instead of `AudioPlaybackConnection `, right? What have you tried with Bluetooth API now? – Roy Li - MSFT Jun 01 '22 at 06:47
  • I’m just looking to get the metadata/controls - I’m happy using whichever API does that. I first tried creating a BluetoothDevice for the same device ID, which I now realize was the wrong approach. I’m currently making a BluetoothLEDevice and trying to use that for metadata access, but getting the list of services didn’t include the UUID for A/V playback control. I found the device ID for the AVRCP “device” shown by the windows device properties for the phone and tried creating a device from that, but it returns no services. I haven’t had much time to play with it since posting, unfortunately. – Shawn Jun 01 '22 at 15:37

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I've consulted the Bluetooth team about this. But currently, control like this is not supported in Windows at this time. You could submit a feature request about this in the Feedback Hub. Please select Developer Platform->API Feedback as the category when you submit your request. The related team will check the request.

Roy Li - MSFT
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  • Does that mean the AVRCP support is only for Bluetooth peripherals connected to the windows pc? That definitely explains why I haven’t been able to find any info on it. Thanks for your time! – Shawn Jun 03 '22 at 16:03