Official documentation
Bluetooth profile comparison
Unity Technologies, Unity Vivox developer guide, Android, n.d.
Read the originalRead on October 16, 2026
- What it is
- Unity developer documentation that compares the Bluetooth profiles its voice SDK uses. It says A2DP audio is high quality and stereo, while audio over the voice (SCO, HFP) connection is lower quality, similar to a standard phone call, and mono.
- How much weight it carries
- Vendor developer documentation for one SDK, not a Bluetooth specification. It is a clear statement of the trade-off, but it does not measure any particular headset.
Facts taken from this source
- Unity developer documentation says audio over a Bluetooth voice connection is of lower quality, similar to a standard phone call, and mono, while A2DP audio is high quality and stereo.
“The rendered audio is of lower quality (similar to that of a standard phone call) and mono.” (Tradeoffs of using SCO or A2DP)