[LAD] ALSA doumentation

Fons Adriaensen fons at kokkinizita.net
Fri Nov 14 14:40:02 UTC 2008

On Fri, Nov 14, 2008 at 03:47:17PM +0200, Hannu Savolainen wrote:

> There is no point in letting any application to change such settings so 
> it has intentionally been made pretty much impossible.

If you think this applies to my situation you are 
wrong on all accounts.

1. It not "made pretty much impossible" in ALSA, all
it takes (on the command line) is an 'amixer sset'.

2. I am the system administrator. I may want to use
an application to do part of my work.

3. The studio wiring can change at any time. There are
four PCs, four ADI648s and MADI connections between them
are made via an RME MADI switch. This is controlled by
software as well. MADI wiring is in function of the
current project or session.

4. If ALSA would allow me to set "Sample Clock Source"
to "AutoSync", "Preferred Sync Reference" to "MADI"
and "System Clock Mode" to "Slave" AND ENSURE THEY
STAY SET LIKE THAT then I wouldn't have to touch them.
But it will switch to "Internal 44.1 kHz" and  "Master"
whenever there is no MADI signal on the input and it
will *not* go back to the original settings when a
signal is present again. Since the MADI links are
switched, this can happen and it should not leave
the system in an inconsistent state. Hence I do have 
to monitor these settings permanently and take action
when they are wrong.



Laboratorio di Acustica ed Elettroacustica
Parma, Italia

Lascia la spina, cogli la rosa.

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