Installing /dev/mixer.

[rvclayton@verizon.net (R. Clayton)]

I have installed alsa

  $ dpkg -l \* | grep -i 'ii.*alsa'  | awk '{ print $2 }'
  alsa-base
  alsa-oss
  alsa-tools
  alsa-tools-gui
  alsa-utils
  alsamixergui
  libasound2:i386
  linux-sound-base

  $ lsmod | grep snd | cut -d ' ' -f 1
  snd_intel8x0
  snd_intel8x0m
  snd_ac97_codec
  snd_pcm
  snd_page_alloc
  snd_timer
  snd
  soundcore
  ac97_bus

  $

on

  $ cat /proc/version | fmt
  Linux version 3.2.0-2-486 (Debian 3.2.20-1)
  (debian-kernel@lists.debian.org) (gcc version 4.6.3 (Debian 4.6.3-7) )
  #1 Mon Jun 11 17:24:05 UTC 2012

  $ 

and it's working for the things I want.  However, I installed xmix, and it
fails when run because it can't find /dev/mixer, which doesn't exist.  How do I
find the smallest set of packages to load that will define /dev/mixer?
apt-file doesn't return anything on a search for /dev/mixer, nor can I find
anything using www.debian.org/distrib/packages .