Re: [Alsa-user] hdsp multiface / sample clock source

[Thomas C. <th...@un...>]

Tim Blechmann wrote :
> hi all,
> 
> i've got a problem with my brand new hdsp multiface / cardbus ... i got
> everything working so far ... modules are installed and can upload the
> firmware ... 
> i can even use the hdspmixer to mix the incoming sounds to the outputs
> ...
> but i didn't manage to play any sound from the computer ... i can
> start jack / pd / spiralmodular, but all i hear is a distorted sound,
> that sounds a bit similar to what i expect the signal to sound ... the
> pitch of the distortion changes when i change the rate of the
> sample clock source ... any idea what could cause this behaviour ?
> btw, i can't start jack when i set the sample clock source to values
> greater than 62khz ...
> the strangest thing ... when starting the audio application, the output
> signal that is routed from the input channels has these distortions,
> too, until i stop the application... 
> 
>  Tim                          mailto:Tim...@gm...
>                               ICQ: 96771783
>                               http://www.nyds-exp-discogs.tk
> --
> The only people for me are the mad ones, the ones who are mad to live,
> mad to talk, mad to be saved, desirous of everything at the same time,
> the ones who never yawn or say a commonplace thing, but burn, burn,
> burn, like fabulous yellow roman candles exploding like spiders across
> the stars and in the middle you see the blue centerlight pop and
> everybody goes "Awww!"
>                                                           Jack Kerouac
> 
> 
> 

Hi Tim,

There clearly seems to be a problem with your setup whenever the card 
generates audio IRQs, but I can't think of anything at the moment.
Could you please give more details, namely :
* the output of lspci -vv
* the output of dmesg
* the contents of /proc/asound/cardX/hdsp where X is your hdsp card number

Now regarding the clock source problem, if you want to start jack with a 
sample rate higher that 48000 you must first select the appropriate 
sample rate with hdspconf or amixer, then start jack specifying the 
desired sample rate on the command line.

Thomas