BUG - Low quality audio over Bluetooth headphones

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drunkensailor Offline
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Post: #1
I've got a set of bluetooth headphones that work fine with OS X, but as soon as XBMC starts playing a file, the quality goes to crap and the Bluetooth audio codec gets changed to SCO from SBC. Before I play a file, the UI audio in XBMC works just fine over the headphones. Quitting XBMC restores the better codec.

I can't figure it out at all. I've tested in 14.0 alpha 3, and the issue persists.

System specs:
Mac mini (Mid 2011), 10.9.4, XBMC 13.2.

Any ideas? I'm at my wits end...

Thanks!
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drunkensailor Offline
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Post: #2
I was able to work around this by forcing XBMC to use the "Fixed" output configuration, with sampling rate limited to 44.1 kHz.

Irritating, and bizarre.
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Memphiz Offline
Kodi MVP
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Location: germany
Post: #3
Not so bizarre - XBMC selects best match - if your source is 48000 hz and your audio device (the headphones) suggest they support it - it might just select it. But 48000hz also results in more data sent which might be to much for the bluetooth bandwidth - so the quality is reduced.

Just really guessing here - but why not?

AppleTV4/iPhone/iPod/iPad: HowTo find debug logs and everything else which the devs like so much: click here
HowTo setup NFS for Kodi: NFS (wiki)
HowTo configure avahi (zeroconf): Avahi_Zeroconf (wiki)
READ THE IOS FAQ!: iOS FAQ (wiki)
(This post was last modified: 2014-09-04 17:13 by Memphiz.)
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psacc Offline
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Post: #4
(2014-09-04 17:01)drunkensailor Wrote:  I was able to work around this by forcing XBMC to use the "Fixed" output configuration, with sampling rate limited to 44.1 kHz.

Irritating, and bizarre.

Same issue here. I can confirm that your solution works. I think this is somewhat related to bluetooth devices that offer multiple audio profiles (headphones and high quality audio).

Hoping it will be resolved soon.

Thanks!
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Memphiz Offline
Kodi MVP
Posts: 16,054
Joined: Feb 2011
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Location: germany
Post: #5
I don't know how this should be solved on my side tbh.

AppleTV4/iPhone/iPod/iPad: HowTo find debug logs and everything else which the devs like so much: click here
HowTo setup NFS for Kodi: NFS (wiki)
HowTo configure avahi (zeroconf): Avahi_Zeroconf (wiki)
READ THE IOS FAQ!: iOS FAQ (wiki)
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calutio Offline
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Post: #6
Fixed. Thanks a lot.
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c0mm0n Offline
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Post: #7
Confirmed as a solution here too, Kodi RC1, OSX, Bose headset.
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boerkeboel Offline
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Post: #8
Solution works like a charm!
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peterdejong Offline
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Post: #9
The fixed 44.1 kHz solution does not work any more, any other suggestions to solve this?
(This post was last modified: 2017-05-29 19:25 by peterdejong.)
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tripkip Offline
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Location: Belgium
Post: #10
44.1 kHz solution worked for me (MBP 2017)

Platforms: Windows 10 - OS X - LibreElec - iOS


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