[pulseaudio-discuss] Pulse Audio - Bluetooth HFP (HCI Mode) , Audio Quality issue and latency

[Vimal Babu]

Hi,

The Bluetooth module we are using is BCM4339

Configuration details

*         Bluez version is 5.37

*         Pulseaudio version is -8.0

*         Bluetooth Chip is in HCI mode

Steps done

*         $ bluetoothctl  // scanned, paired, trusted,connected the mobile phone to our device

*         $ pactl list // we can see bluez.source and sink

*         Using ofono telephony service we have made call to other mobile

Ring sound started to hear in our local speaker, when we attended the called at the receiver end.

We are facing two issue, they are the following

*         Bluez.source to alsa sink (local speaker) the sound quality is poor.

*         USB MIC(local mic) to Bluez.sink, we have observed a latency of about 30-40 seconds for the audio.

What will be the cause of the latency in audio transfer from MIC to bluez.sink..? How can we improve audio quality and latency from mic side.

Please help me....

Regards,
Vimal Babu
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