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

Tanu Kaskinen tanuk at iki.fi
Sun May 29 10:29:23 PDT 2011

On Sun, 2011-05-29 at 23:03 +0800, Lin, Mengdong wrote:
> Many thanks for your information!
> > A monitor source is just a device that you can record from (just like a
> > mic). It will contain the same data that is playing on the device.
> Could you give me more information on how to use the monitor source? 
> I want to capture the data playing on the Bluetooth sink after GTalk input stream is connected to the sink. Can I do this by using pacmd?

You can capture the data with any recording program. pacmd isn't a
recording program so no, you can't do it with pacmd. If you want to use
the PA tools, you can use parec:

parec --device=bluez_sink.XX_XX_XX_XX_XX_XX.monitor --fix-format --fix-rate --fix-channels > bt_audio.raw

The device parameter is the name of the source - you can check the
available sources with pacmd or pactl. The one that starts with
"bluez_sink." and ends with ".monitor" is the monitor source for the BT

Check the man page for pacat (parec is an alias of pacat, and at least
my system doesn't give anything if I try "man parec" but "man pacat"
works) to understand the rest of the parameters - they are not
mandatory, but in this use case you probably want them.


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