[linux-audio-user] some apps don't work with usb-audio

[Clemens Ladisch]

Martin Kuball wrote:
> I have a Griffin iMic USB audio device. It works well using aplay and 
> xmms with the usb device I configured in my asoundrc.
> 
> But I cannot get ogg123 to work with this. E.g. 
> 
> 	ogg123 -d alsa09 -o dev:usb tr30.ogg
> 
> 	ALSA snd_pcm_hw_params_set_format error: the argument is invalid

You configured your "usb" device so that it doesn't do any automatic
sample format conversion.  Add a "plug" plugin, like this:

pcm.usb {
	type plug
	slave.pcm {
		type hw
		card 42     # or whatever the card number is ...
		device 0
	}
}


HTH
Clemens