[pulseaudio-discuss] sound volume for recording

[Tanu Kaskinen]

On Wed, 2016-09-21 at 20:05 +0200, Istvan Gabor wrote:
> I have another question:
> 
> I am puzzled by stream/sink names in pavucontrol window.
> 
> For example in the playback tab I have:
> 
> Virtual Sink Stream from Virtual Sink pizza on Built-in Audio Analog Stereo on _Built-in_Audio_Analog_Stereo_
> 
> AND
> 
> ALSA plug-in [plugin container]: ALSA Playback on _Virtual_Sink_pizza_on_Built-in_Audio_Analog_Stereo_
> 
> The underlined parts are in a button on the right.
> 
> What do these definitions/descriptions exactly mean?

module-virtual-sink connects to the master sink by creating a stream.
This stream has description "Virtual Sink Stream from Virtual Sink
pizza on Built-in Analog Stereo". The stream description is generated
using this pattern: "Virtual Sink Stream from <virtual sink
description>". The virtual sink description in turn has pattern
"Virtual Sink <sink name> on <master sink description>". You configured
the virtual sink name to be "pizza", and the master sink description is
"Built-in Audio Analog Stereo". The awfully long stream description is
a combination of all these.

The second stream description is for an alsa application stream. Those
streams use "ALSA plug-in [<program name>]: ALSA Playback" as the
description (the description is set by the alsa plugin that connects
alsa applications to pulseaudio). I assume you're playing Flash content
in a browser. "plugin container" is a string that the browser has set
as the Flash plugin process name.

-- 
Tanu