[alsa-devel] Default Sample rate Conversion

[Takashi Iwai]

At Tue, 22 May 2007 21:40:43 -0700,
Prabhu Sivaraja wrote:
> 
> Does ALSA automatically convert to my devices sample rate?
> My alsa.conf file is below
> 
>  pcm.mix {
>         type dmix
>         ipc_key 1024
>         slave {
>          pcm "hw:0,0"
>          rate 48000
>         }
>     }
>     pcm.!default {
>         type plug
>         slave.pcm "mix"
>     }
> 
> When I play a 32KHz file with aplay does it get up sampled to my device's
> 48KHz sample rate? I am assuming it does as it plays just fine but I am not
> sure where the upsampling happens?

Yes, the plug plugin does almost everything including upsamling.


Takashi