madplay: How to select a specific ALSA card

Hi,
I just started using madplay a short while ago and I was wondering
whether it is possible to select an ALSA card different from the default
one for audio output.
>From looking at the code it seems like the PATH part of --output is
used, however
  madplay --output=alsa:plughw:1 myfile.mp3
chokes as the TYPE alsa does not exist (in audio.c).

Did I miss something in the command line or is this a bug / missing
feature (for which I could provide a patch)?

Thanks,
-Thomas