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<div class="moz-cite-prefix">On 12.10.2017 13:26, Vimal Babu wrote:<br>
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cite="mid:4815CB4798628F4A93818B85D75FA1E51F2C6DD4@MBCHN01.chn.nestgroup.net">
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<div class="WordSection1">
<p class="MsoNormal"><b>ISSUE : POOR AUDIO QUALITY AND HIGH
LATENCY WHILE USING HFP<o:p></o:p></b></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal">We are using Bluetooth HFP Configuration
with Pulse Audio, BlueZ and oFono components and facing issues
of poor Audio high latency.<o:p></o:p></p>
<p class="MsoNormal">Using HFP we are able to receive and
transmit voice (BlueZ stack is running in EVK and a mobile is
paired to it. From EVK, over BT we are making call to other
Mobile).<o:p></o:p></p>
<p class="MsoNormal">At the reception part (Mobile to EVK ) the
audio quality is poor but no latency is there, but voice
transmission part (EVK to Mobile)there is a high latency of
30-40 sec to get the audio which is not desirable.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is these issues related to configuration
part of pulse audio, anyone please guide with proper
configuration method of pulse audio?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Configuration details in EVK<o:p></o:p></p>
<p class="MsoListParagraph"
style="text-indent:-.25in;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="font-family:Symbol"><span style="mso-list:Ignore">ˇ<span
style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]-->Bluez (version is 5.37)<o:p></o:p></p>
<p class="MsoListParagraph"
style="text-indent:-.25in;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="font-family:Symbol"><span style="mso-list:Ignore">ˇ<span
style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]-->Pulseaudio (version is
-8.0)<o:p></o:p></p>
<p class="MsoListParagraph"
style="text-indent:-.25in;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="font-family:Symbol"><span style="mso-list:Ignore">ˇ<span
style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]-->Bluetooth Chip is in
HCI mode <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Steps done<o:p></o:p></p>
<p class="MsoListParagraph"
style="text-indent:-.25in;mso-list:l2 level1 lfo2"><!--[if !supportLists]--><span
style="font-family:Symbol"><span style="mso-list:Ignore">ˇ<span
style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]-->$ bluetoothctl //
scanned, paired, trusted,connected the mobile phone to our
device<o:p></o:p></p>
<p class="MsoListParagraph"
style="text-indent:-.25in;mso-list:l2 level1 lfo2"><!--[if !supportLists]--><span
style="font-family:Symbol"><span style="mso-list:Ignore">ˇ<span
style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]-->$ pactl list // we can
see bluez.source and sink<o:p></o:p></p>
<p class="MsoListParagraph"
style="text-indent:-.25in;mso-list:l2 level1 lfo2"><!--[if !supportLists]--><span
style="font-family:Symbol"><span style="mso-list:Ignore">ˇ<span
style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]-->Using ofono telephony
service we have made call to other mobile<o:p></o:p></p>
<p class="MsoListParagraph"
style="text-indent:-.25in;mso-list:l2 level1 lfo2"><!--[if !supportLists]--><span
style="font-family:Symbol"><span style="mso-list:Ignore">ˇ<span
style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]-->Ring sound started to
hear in our local speaker in EVK, when we attended the called
at the receiver end (Mobile).
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We are facing two issue, they are the
following<o:p></o:p></p>
<p class="MsoListParagraph"
style="text-indent:-.25in;mso-list:l1 level1 lfo3"><!--[if !supportLists]--><span
style="font-family:Symbol"><span style="mso-list:Ignore">ˇ<span
style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]-->Bluez.source to alsa
sink (local speaker) the sound quality is poor.<o:p></o:p></p>
<p class="MsoListParagraph"
style="text-indent:-.25in;mso-list:l1 level1 lfo3"><!--[if !supportLists]--><span
style="font-family:Symbol"><span style="mso-list:Ignore">ˇ<span
style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]-->USB MIC(local mic) to
Bluez.sink, we have observed a latency of about 30-40 seconds
for the audio.<o:p></o:p></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
</div>
</blockquote>
<b></b><br>
I would recommend an update to PA 11.1 if possible. If that does not
fix your<br>
problem or if you can't upgrade for some reason, a verbose pulsaudio
log would<br>
be helpful.<br>
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