Bluetooth stuttering

[PatrickBeau]

Hi,

i own a z3 Compact and a Nokia hifi receiver, which is AptX compatible.

Once the smartphone pair with the receiver, and play music, it's impossible to ear it correctly: there is gaps and crakles. I've tried with Wifi disabled, and it's the same problem.

Do you have any hints to correct this?

Regards,

Patrick

[AlzBrain]

Having the same issue with a Z1C.

I paired a LG HBS 700 and I'm having stuttering and interruptions with the sound. 

Pretty awful.

I am using an Android Version 4.4.4 and the Build number is 14.4.A.0.108. No stuttering with plain headphones, but the bluetooth one **bleep**.

[AlzBrain]

Found a solution for my problem:

Used this app: https://play.google.com/store/apps/details?id=de.devmil.xperiabluetoothmediafix

Selected the device which is giving me problems and voilá.

Good, since my car media center works fine.

[backslashhh]

In my case, the sound is played with the wrong sample frequency, as if the device could only playback 44kHz and bluetooth sends over 48kHz data.

So, the playback is too slow, the new packet arrives and a stutter is heard when the new data is played back, but the old was not yet finished.

Seems like the bluetooth handshake had a mismatch of the sampling frequencies or the android bluetooth stack does not resample.

[Sebi673]

Found a fix for the stuttring. It's the dumb kernel on 5.02 that stutters the playback as soon as screen is off. I used a partial wakelock so the cpu stays active after screen off with this app. It works. No more stuttering. As for speakers that require high sample rate I just switched the cpu governor to performance. It's a workaround but the partial wakelock should work especially on bluetooth headphones. Here's the app's link https://play.google.com/store/apps/details?id=eu.thedarken.wl&hl=en

On Xperia Z at least, watch out for governor settings not sticking - it has the tendency to jump to 702Mhz as min FQ which overheats the phone and drains the battery. Don't know which app jumps the governor but after music playback I always open trickster and fix the min FQ.

[backslashhh]

Ok, all of my bluetooth issues are fixed with 5.x Lollipop. Thanks!

[Eelkes]

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@backslashhh wrote:

Ok, all of my bluetooth issues are fixed with 5.x Lollipop. Thanks!

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Just wait, after a few days it will return... 

Clear your cache, this will fix it for a few days: 

In home screen, hold volume up + power button till it vibrates 3 times, turn phone on again, and voila, cristal clear sound till the stuttering returns again.