Try forcing it to play at 48 kHz.  Some codecs can only handle 48 kHz.

    -- Lennart

Duncan McEwan wrote:

> Frederick Bruckman <fredb@immanent.net> said:
> >
> > Have you tried
> >
> >       audioplay welcome.au
>
> I hadn't, but I have now!
>
>           audioplay welcome.au
>           audioplay: failed to open /dev/audio: Invalid argument
>
> > Maybe not. The "unknown codec" could be a winmodem, or an FM
> > synthesizer -- probably nothing essential.
>
> OK.
>
> One other thing I noticed that I forgot to mention in my original posting.
> The IRQ assigned to this device (11) is also used by the USB controller.
> I know some interupt sharing is allowed, but I'm not clear on what is
> valid and what isn't.  Here are a few more lines from the boot messages...
>
> ...
> uhci0 at pci0 dev 31 function 2: Intel 82801BA USB Controller (rev. 0x12)
> uhci0: interrupting at irq 11
> usb0 at uhci0: USB revision 1.0
> uhub0 at usb0
> uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
> uhub0: 2 ports with 2 removable, self powered
> ...
> auich0 at pci0 dev 31 function 5: i82801BA (ICH2) AC-97 Audio
> auich0: interrupting at irq 11
> auich0: unknown (0xffff5360) codec; headphone, Analog Devices Phat Stereo
> audio0 at auich0: full duplex, mmap, independent
> ...
>
> Thanks,
>
> Duncan