Bluetooth audio profile management
Manage user Bluetooth preferences.
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The Vivox SDKs for Android support selecting a preference for a Bluetooth audio profile. By default, Bluetooth Synchronous Connection Oriented Link (Hands-Free Profile) is preferred so that microphone audio is captured from the Bluetooth headset. The only other available preference is for Bluetooth Advanced Audio Distribution Profile (A2DP), which allows for high-quality stereo audio output at the cost of having to get microphone audio from the Android handset microphones.
The Bluetooth profile preference may be set by developers (or users, if exposed in the application's settings) in order to achieve the desired Bluetooth behavior on Android. This documentation goes into the details of what the Bluetooth profiles are and what is to be expected from the default profile preference (SCO) and its alternative (A2DP).
Bluetooth profile
The Bluetooth API includes support for working with Bluetooth profiles. A Bluetooth profile is a wireless interface specification for Bluetooth-based communication between devices, such as the Hands-Free profile. For example, for a mobile device to connect to a wireless headset, both devices must support the Hands-Free profile.
The Bluetooth API provides implementations for the following Bluetooth profiles that are relevant to Vivox:
- A2DP: The Advanced Audio Distribution Profile.
- HFP: The Hands-Free Profile (aka SCO).
| Bluetooth profile comparison | A comparison between using A2DP or SCO profiles. |
| SCO handshake failures | Why does the SCO handshake sometimes fail? |
| Bluetooth tradeoffs with Vivox | Bluetooth profile behavior in Vivox. |
| Changing Vivox's Bluetooth profile | How to change the Bluetooth profile used by a Vivox application. |
| Troubleshooting SCO underrun issues | A suggested work-around for choppy audio with SCO. |