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What I have done till now

  • I am able to connect an external hardware to my android device via USB.
  • After detection of external hardware, I am establishing an USB connection.
  • After connection I am able to read/write data through app.

Now what I need is to stream FM modulated audio to android device speaker and audio port.

Does android automatically does it for us, as we do stream music over BT headset using A2DP profile or we need to create some sort of player and enable some functions of device ?

After going through multiple docs and android developer site itself, I come upto AOA2 protocol that allows android device to stream audio to its attached accessories via USB.

As per the docs an Android device can't act as USB speakers.

Is there any alternative way we can make an Android device as USB speakers for any external Hardware.

Any help is appreciated.

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