[pulseaudio-discuss] how to troubleshoot bluetooth audio issues?

Oleksij Rempel fishor at gmx.net
Tue Oct 16 08:25:37 PDT 2012

Hi Tanu,

are there any way to make minimal sound level more silent for bluetooth 
headset? I mean HSP profile. If i understand correctly, pulse 
responsible for it, not hardware.

Am 14.10.2012 19:24, schrieb Oleksij Rempel:
> Am 14.10.2012 17:59, schrieb Tanu Kaskinen:
>> On Sun, 2012-10-14 at 17:29 +0200, Oleksij Rempel wrote:
>>> Hallo all, (Pulseaudio and Bluetooth devs)
>>> i have Samsung HS3000 bluetooth headset. Mostly it works but there are
>>> different issue with it:
>>> - volume level seems to be set to max (at really uncomfortable level)
>>> - at the moment i trying to change volume with pavucontrol or after it i
>>> get bad sound. Some times sort of cracky or trashy sound, some times
>>> just white noise.
>>> - play/stop key do not works with linux (not pulse issue)
>>> how to troubleshoot this issues? what tools should i use and where
>>> should it start?
>> Regarding the broken audio: I would suspect that the headset is buggy,
> hehe, nice try :) This headset works perfectly with my
> smartphone/cyanogenmod.
>> because the volume handling code should be pretty well tested in
>> pulseaudio,  and I don't think bluetoothd touches the audio signal at
>> all. To confirm that, I think it's somehow possible to capture the audio
>> that is sent to the headset, but I don't know how. Maybe the bluez
>> people can answer that (I'm a pulseaudio guy myself).
>> Are you using the headset in the HSP or A2DP mode, btw? If A2DP, then
>> that would suggest a pulseaudio bug, since I don't think the headset
>> will get any notification via A2DP when you change the volume in
>> pavucontrol.
> You right, i played with different profiles. HSP controls volume on
> pulse, but minimal volume is still too loud. A2DP use internal volume
> control and i can set it as silent as i need.
> I made some more tests with different kernels. It looks more like kernel
> issue. I get different oopses and it looks like 3.5.0 sounds better then
> current master git.

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