Technical Information
This Music file Playback feature is using Andriod Open Accessory 2.0 (AOA 2.0) technology.
Support:
- Android OS Version 4.1 and above
- Some Android devices may not fully support AOA 2.0 even OS Version 4.1 and above.
Main Features:
- Audio Over USB. (Digital Audio)
- All the audio will be routed to USB Audio when an accessory is connected to the Android device.
- Only 44.1kHz 16 bit PCM data format is supported by Android devices.
- Media Control communication channel
- Media control command (such as Play/pause, next, previous etc..) can be sent from accessory to Android device.
- Android device will start default media player app to handle the media control command.
- It is the same behaviour as Bluetooth Audio media control.
- Custom communication channel between Android device and accessory
Android Open Accessory (AOA) is introduced by Google to allow accessories (such as audio dock or other music playback device) to communicate with Android devices via USB. Once an Android device is connected with an accessory, the Android device treats the accessory as a standard audio output device, hence all the audio will be routed to the accessory.
