[pulseaudio-discuss] How to check audio sample data to a bluetooth sink?

[Arun Raghavan]

On Fri, 2011-05-27 at 17:56 +0800, Lin, Mengdong wrote:
> Could anybody tell me how dump the data to a Bluetooth sink from a
> VOIP sink input stream? Which function shall I hack? 
> 
>  
> 
> I try to run GTalk with Bluetooth headset. I set the card profile to
> HSP. And the input stream/output stream are connected to the Bluetooth
> sink/source. 
> 
> But I cannot hear the voice from the other side. Increasing the volume
> of sink or sink input does not work. In fact, I tried a very large
> number but the VOIP stream keeps quite in my BT headset.
> 
> If I launch a music player at the same time and also move the stream
> to the Bluetooth sink (HSP), I can hear the song. It means the BT sink
> is working.
> 
> If I disconnect Bluetooth handset and switch to speaker, I can here
> weak voice from GTalk. Does the data become invalid when it’s
> connected to BT sink?
> 
>  
> 
> So I want to check the input data from GTalk to the Bluetooth sink, to
> see whether the data is bad or just too weak for the BT headset. 

You could just run pavucontrol which gives you a vu meter of the various
recording and playback levels. You can also connect to the monitor
source of the sink to capture the actual data.

-- Arun