Pulse Audio - Bluetooth HFP (HCI Mode) , Audio Quality issue and latency

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Hi Luiz,

In our board we are using USB Mic, no inbuilt mic is there and I havenâ??t tried with another USB Mic. I will get the log's of the pulseaudio.

Regards,
Vimal Babu

-----Original Message-----
From: pulseaudio-discuss [mailto:pulseaudio-discuss-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of Luiz Augusto von Dentz
Sent: Thursday, October 12, 2017 12:05 PM
To: General PulseAudio Discussion
Subject: Re: Pulse Audio - Bluetooth HFP (HCI Mode) , Audio Quality issue and latency

Hi Vimal,

On Thu, Oct 12, 2017 at 9:08 AM, Vimal Babu <Vimal.Babu at nestgroup.net> wrote:
> 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.

I recall having some issue with buffering but 30-40 is extremely high, have you tried with another mic or that the only mic available in the system? Anyway I guess pasting the pulseaudio logs might be useful.

>
>
> 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 meâ?¦.
>
>
>
> Regards,
> Vimal Babu
>
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--
Luiz Augusto von Dentz
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Confidentiality Statement / Disclaimer : This message and any attachments is intended for the sole use of the intended recipient. It may contain confidential information. Any unauthorized use, dissemination or modification is strictly prohibited. If you are not the intended recipient, please notify the sender immediately then delete it from all your systems, and do not copy, use or print. Internet communications are not secure and it is the responsibility of the recipient to make sure that it is virus/malicious code exempt.

The company/sender cannot be responsible for any unauthorized alterations or modifications made to the contents. If you require any form of confirmation of the contents, please contact the company/sender. The company/sender is not liable for any errors or omissions in the content of this message.

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