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[System] Bluetooth audio issue - skipping / choppy

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1238 16 |
15:43, Jul-03-2018 | From PC
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Go to reply no.
Device
Redmi Note 5 Pro
MIUI Version
V9.5.13.0.OEIMIFA
Reproduce rate
100%
ROM version
Global Stable ROM
Country/Region
Slovakia
Description
Hi, I went from OnePlus One to --> Redmi Note 5 (3GB / 32GB version)

I have a problem with playing music via Bluetooth.
Audio is simply chopping/skipping, respectively sometimes it will skip the sound for about 0.1s.
I have a phone paired with original radio in Seat Ibiza 2018 (OnePlus one went without these anomalies)

What I tried already:
• Reinstall all music players
• Re-pair BT device
• Turn off battery saving mode for applications (for all)
• Let the music player run only itself in the background
Steps to reproduce
Just play music to some BT player / speaker for 5-10 minutes. The stuttering is random, sometimes it stutter 2x times at the begginging and sometimes it stutter 2 times per 5 minutes.
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MIUI Bug Hunter Team

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16:24, Jul-03-2018 | From Redmi 4A
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Dear user
Thank you for your report, which music player are you using? kindly do let us know
Thank you

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 Author| 18:17, Jul-03-2018 | From Redmi Note 5
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Poweramp, Stock Player in MIUI, Music Player Pro, and last one Pi Music Player. All players have the same bahaviour. I think the problem is in the processing sound through bluetooth. There is some problem with the processing. Thanks

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 Author| 16:11, Jul-04-2018 | From Redmi Note 5
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Please, how Can i attach Bluetooth log? I turned this options in devs settings.

Maybe i found important interesting finding.

When music or lets call it BT transfer skips or lags it is noticable that music quality is higher. It seems that the transfer is not on the same bitrate all timr, and bitrate is changing. It degradate over time, then it skip and it seems that again it is on the higher bitrate and this is happening over and over.

Sorry for my english, i hope you can understand my finding and please can you let me know if it is just SW issue or HW related?

Thanks, i hope dev team can soon look at this big issue. I am using BT every day. Thanks

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 Author| 18:57, Jul-04-2018 | From PC
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Hello, sorry for secod post, but i finnaly find Soulution and also where is the problem!!!

As i wrote before, there is some issue with chaning bitrate, and yes i was right!

The problem is Codec LDAC Bluetooth Audio Settings (There are 4 settings)
• Optimalized Quality sound (990kbps/909kbps)
• Balanced sound quality (660/606kbps)
• Optimalized connection quality (330/303kbps)
Highest quality (adaptive bitrate!!!) (This is as default)

The problem is that default is set as adaptive bitrate, if i change it to Best Quality 990kbps, everything is working without any lag in sound.

I have a Question. If now we know, where is the problem, How Can i change the default Adaptive Bitrate ---> to --> Maximum Quality bitrate (990kbps) ???
If you change this setting, it will change again after disconnecting and reconnecting to BT Device ... Is there any way how to do it?

Thank you!!!!

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Mi Band 2Magic CubeFan Of MIUI Czech

05:14, Jul-05-2018 | Via mobile
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The same problem on MI6, please fix it...

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Mi Band 2Magic CubeFan Of MIUI Czech

05:20, Jul-05-2018 | Via mobile
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This Is very big problem, bluetooth Is malfunction for musí listen And MI6 have not phone output!!

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16:45, Jul-12-2018 | From PC
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I do use LG Xboom Hnady. the bluetooth pairing is happening, when i try to connect, it just skipping, nothing happens.
Phone Redmi note 5 pro - Android -O , MIUI Version - 9.5.17

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 Author| 17:12, Jul-12-2018 | From PC
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Can please Xiaomi devs reply to this ISSUE? There is something wrong with bitrate / codecs... It is changing bitrate when music is playing through BT. It causes the skipping.

Thanks!

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20:03, Jul-12-2018 | From PC
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