I submitted a patch to do just this upstream.
http://git.alsa-project.org/?p=alsa-utils.git;a=commit;h=3b1ee6b325926336564c73c5c22831b59f404805
I submitted a patch to do just this upstream.
http:// git.alsa- project. org/?p= alsa-utils. git;a=commit; h=3b1ee6b325926 336564c73c5c228 31b59f404805