# dsp dev
KERNEL=="dspctl", NAME="dspctl/ctl"
KERNEL=="dspmem", NAME="dspctl/mem", MODE="0640", GROUP="kmem"
KERNEL=="dsptwch", NAME="dspctl/twch", MODE="0640"
KERNEL=="dsperr", NAME="dspctl/err", MODE="0440"
KERNEL=="dsptask[0-9]*", MODE="0666"

# PCM
pcm.!default {
type alsa_dsp
playback_device_file ["/dev/dsptask/pcm3"]
recording_device_file ["/dev/dsptask/pcm_rec1"]
}

# Mixer
ctl.!master {
type hw
card 0
}

ctl.!default {
type dsp_ctl
playback_devices ["/dev/dsptask/pcm3"]
recording_devices ["/dev/dsptask/pcm_rec1"]
}

# OSS emulation
pcm.dsp0 pcm.default
ctl.mixer0 mixer.default

#
audio_output {
type "ao"
name "default ao output"
# driver "alsa"
write_size "4096"
}
#audio_output {
# type "alsa"
# name "tablet sound"
# device "pcm.default" # optional
#
# format "44100:16:2" # optional
# use_mmap "yes"
#}
#...

(define devices '(alsa))
(define alsa-out-device "default")

#!/bin/sh
#
# modprobe post-install script for alsa

udev_is_active()
{
test -e /dev/.udev || test -d /dev/.udevdb || return 1
return 0
}

if udev_is_active ; then
# Stuff is done in a udev-run script instead
exit 0
fi

case "$1" in
snd-*-synth)
# module is not a sound card driver with a mixer
:
;;
*)
# module is a sound card driver with a mixer
exec /etc/init.d/alsa-utils start
;;
esac

#!/bin/sh
# DSP Gateway init script
# Copyright (C) 2007 INdT.
# @author Abner Jose de Faria Silva <abner.silva@indt.org.br>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

set -e

DESC="DSP Gateway"

DAEMON=/usr/sbin/dsp_dld
DSPCTL=/usr/sbin/dspctl
DSPCONF=/lib/dsp/dsp_dld_avs.conf

DAEMONPARAM="-p --disable-restart -c $DSPCONF"

KMEMRESERVE=360000

PIDDIR=/var/run/dsp
PIDFILE=$PIDDIR/pid

test -x "$DAEMON" || exit 0
test -x "$DSPCTL" || exit 0
test -e "$DSPCONF" || exit 0

start_dsp()
{
if [ ! -d "$PIDDIR" ]; then
mkdir -p "$PIDDIR"
fi

if [ -e "$PIDFILE" ]; then
TMP=/proc/$(cat $PIDFILE)
if [ -d "$TMP" -a "$(readlink -f $TMP/exe)" = "$DAEMON" ]; then
echo "$DESC is already running."
return
else
echo "Removing old PID file $PIDFILE."
rm -f "$PIDFILE"
fi
fi

echo -n "Starting $DESC: "

chroot /mnt/initfs $DSPCTL kmem_reserve $KMEMRESERVE
start-stop-daemon --start --quiet -b --make-pidfile --pidfile "$PIDFILE" \
--exec "$DAEMON" -- $DAEMONPARAM

echo "done."
}

stop_dsp()
{
echo -n "Stopping $DESC: "

$DSPCTL kmem_release
start-stop-daemon --stop --quiet --name $(basename "$DAEMON") \
--pidfile "$PIDFILE"
rm -f "$PIDFILE"

echo "done."
}

case "$1" in
start)
start_dsp
;;
stop)
stop_dsp
;;
restart|force-reload)
stop_dsp
start_dsp
;;
*)
echo "Usage: $(basename $0) {start|stop|restart|force-reload}" >&2
exit 1
;;
esac

echo ""

exit 0

if [ ! -e /lib/modules/`uname -r` ]; then
mkdir -p /lib/modules/`uname -r`
ln -s /mnt/initfs/lib/modules/`uname -r` /lib/modules/`uname -r`/kernel
depmod -a

Originally Posted by Stskeeps

http://physik.de/770/ARMEL-Install.txt <- from dschmicker's lenny debootstrap