[arch-general] Basic questions about Linux's sound system

[Ralf Mardorf]

On Tue, 31 Jan 2017 13:09:13 +0100, Ralf Mardorf wrote:
>On Tue, 31 Jan 2017 12:41:06 +0100, Peter Nabbefeld wrote:
>>                     +-----------+
>>                     |   Totem   |
>>    +------------+   +-----------+   +-----------------+
>>    | Rosegarden |   | GStreamer |   | Appl. using PA  |
>>    +------------+---+-----------+---+-----------------+
>>    |   Jack     |            Pulseaudio (PA)          |
>>    +------------+-------------------------------------+
>>    |        ALSA           -          Bluez           |
>>    +--------------------------------------------------+  
>
>Hi,
>
>I can't comment "Bluez", I don't know how this works.
>Anyway, it's Still incorrect, since only one sound server could grab
>the audio device, the other sound sever needs to use the sound server
>connected to ALSA.
>
>                     +-------------+
>                     | Application |
>+-------------+      +-------------------+
>| Application |      | One sound server  |
>+----------------------------------------+
>| Another Soundserver connects with ALSA |
>+------------+---------------------------+
>| ALSA connects software and hardware    |
>+----------------------------------------+
>| Hardware                               |
>+----------------------------------------+
>
>That's simplified, but in this context IMO good enough.
>
>Regards,
>Ralf

PS: One sound server not necessarily needs to use the other, if you
stop one sound sever, before only using the other sound sever, but if
you use both at the same time, one sound server has direct ALSA access,
the other doesn't have.