Re: hdsp: output fader control via command line

[Thomas Charbonnel <thomas@undata.org>]

Martin Dausel wrote :
> Hello,
> i want to initialize my hdsp 9652 at startup to unmute the outputs 
> without using hdspmixer.
> 

The outputs are not "muted", but the matrix mixer is empty.

> Before the output fader controls were removed from the alsa control 
> interface i used this script:
> 
> ********************************************************
> 
>     #!/bin/bash
>      
>     i=0
>     j=0
>     count=26
>     count2=52
>     until [ $i -gt $count ]; do
>        
>         # inner loop delete all routing
>         j=0
>         until [ $j -gt $count2 ]; do
>                     amixer cset numid=5 $j,$i,0
>                     j=`expr $j + 1`
>         done
>        
>         # set default routing software output n routes to hardware output n
>         amixer cset numid=5 `expr $i + 26`,$i,32768
>         i=`expr $i + 1`
> 
>         # set ouput faders to 0dB
>         amixer cset iface=MIXER,name='Chn',index=$i 32768
>     done
> 
> **********************************************************
> 
> Using the current alsa driver i can't use the line "amixer cset 
> iface=MIXER,name='Chn',index=$i 32768".
> Is there any alternative (excluding hdspmixer)?
> 

You can use amixer with the Mixer control.

> It would be very nice if there would be an parameter for the snd-hdsp 
> module to control if the ouptuts are muted or at 0dB ( in a way like the 
> "line_outs_monitor" parameter ).
> 

Could be done. Maybe at some point I'll add a parameter so that you can 
choose amongst the default hdspmixer presets at module insertion time.

> Is it possible to initialize the hdsp with a saved hdspmixer setting 
> without using hdspmixer or better said without running X.
> 

You can do so with a small shell script and the Mixer element of amixer. 
You can find more information on the syntax browsing the alsa-dev 
archive and on the hdsp card page of the alsa-project website.
I plan to add an option to export a shell script restoring the current 
setup in the next hdspmixer release.

Thomas




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