i'm trying to record from a microphone with an audiostix 2. i have these packages alsa-lib, alsa-utils, aumix, and bplay. and i was following the instructions on the wiki: http://docwiki.gumstix.org/Frequently_asked_questions/GPSstix_and_Audiostix2#How_can_a_sound_be_recorded_and_played_back_on_the_audiostix.3F

after doing modprobe on snd-pxa2xx-ac97, snd-pcm-oss, and snd-mixer-oss.

here is the error i get:
[root@gumstix ~]# brec > foo
brec: /dev/dsp: Invalid argument

does anyone know what to do about this?