Audio config

Install jackd1 (not jackd2 since it depends on dbus, meh).

Use this /etc/init.d/jackd file

#!/bin/sh
#
# Jackd init script
#
### BEGIN INIT INFO
# Provides:          jackd
# Required-Start:    $local_fs
# Required-Stop:
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: init-Script for system wide fetchmail daemon
### END INIT INFO
#
# A fetchmailrc file containg hosts and passwords for all local users should be
# placed in /etc/fetchmailrc.  Remember to make the /etc/fetchmailrc mode 600
# to avoid disclosing the users' passwords.
#
# This script will NOT start or stop fetchmail if the /etc/fetchmailrc file
# does not exist or /etc/default/fetchmail is set to no.

set -e

# Defaults
PATH=/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/bin/jackd
USER=
OPTIONS=""

PIDFILE="/var/run/jackd.pid"

test -f /etc/default/jackd || exit 0
. /etc/default/jackd

OPTIONS="$OPTIONS"

if [ ! "x$START_DAEMON" = "xyes" -a ! "$1" = "stop" ]; then
	echo "Edit /etc/default/jackd to start jackd"
	exit 0
fi

test -f $DAEMON || exit 0

. /lib/lsb/init-functions

case "$1" in
	start)
		if test -e $PIDFILE ; then
			pid=`cat $PIDFILE | sed -e 's/\s.*//'|head -n1`
			PIDDIR=/proc/$pid
		    if [ -d ${PIDDIR} -a  "$(readlink -f ${PIDDIR}/exe)" = "${DAEMON}" ]; then
				log_failure_msg "jackd already started; not starting."
				exit 0
			else
				log_warning_msg "Removing stale PID file $PIDFILE."
				rm -f $PIDFILE
			fi
		fi
		if pgrep -u $USER jackd > /dev/null 2>&1; then
			log_failure_msg "jackd already running as user $USER; not starting."
			exit 0
		fi
	        log_begin_msg "Starting jackd audio server:" "jackd"

		if start-stop-daemon -b -S -o -q -x $DAEMON -u $USER -a /bin/su -- - $USER -c "$DAEMON $OPTIONS"; then
			while ! pgrep -u $USER jackd > /dev/null 2>&1; do continue; done
			pgrep -u $USER jackd > $PIDFILE
			while ! su - $USER -c jack_lsp > /dev/null 2>&1; do
				sleep 0.1
			done
			log_end_msg 0
		else
			log_end_msg 1
			exit 1
		fi
                #JACK_PROMISCUOUS_SERVER is exported in /etc/environment, but the permissions are not set up correctly
                chmod -R 777 /dev/shm/jack
		;;
	stop)
		if ! test -e $PIDFILE ; then
			log_failure_msg "Pidfile not found! Is jackd running?"
			exit 0
		fi
	        log_begin_msg "Stopping jackd audio server:" "jackd"
		if start-stop-daemon -m -K -o -q -p $PIDFILE -x $DAEMON -u $USER; then
                        rm -f $PIDFILE
			log_end_msg 0
		else
			log_end_msg 1
			exit 1
		fi
		if pgrep -u $USER jackd; then
			killall -9 $DAEMON
			exit 0
		fi
		;;
	force-reload|restart)
	        log_begin_msg "Restarting jackd audio server:" "jackd"
		if ! start-stop-daemon -m -K -o -q -p $PIDFILE -x $DAEMON -u $USER; then
			log_end_msg 1
			exit 1
		fi
		sleep 1
                rm -f $PIDFILE || true
		if start-stop-daemon -m -b -S -o -q -p $PIDFILE -x $DAEMON -u $USER -c $USER -a $DAEMON -- $OPTIONS; then
			log_end_msg 0
		else
			log_end_msg 1
			exit 1
		fi
		;;
	try-restart)
		if test -e $PIDFILE ; then
			pid=`cat $PIDFILE | sed -e 's/\s.*//'|head -n1`
			PIDDIR=/proc/$pid
			if [ -d ${PIDDIR} -a  "$(readlink -f ${PIDDIR}/exe)" = "${DAEMON}" ]; then
				$0 restart
				exit 0
			fi
		fi
		test -f /etc/rc`/sbin/runlevel | cut -d' ' -f2`.d/S*jackd* && $0 start
		;;
	awaken)
	        log_begin_msg "Awakening jackd audio server:" "jackd"
		if [ -s $PIDFILE ]; then
			start-stop-daemon -K -s 10 -q -p $PIDFILE -x $DAEMON
			log_end_msg 0
			exit 0
		else
			log_end_msg 1
			exit 1
		fi
		;;
	*)
		log_warning_msg "Usage: /etc/init.d/jackd {start|stop|restart|force-reload|awaken|debug-run}"
		log_warning_msg "  start - starts system-wide jackd service"
		log_warning_msg "  stop  - stops system-wide jackd service"
		log_warning_msg "  restart, force-reload - starts a new system-wide jackd service"
		log_warning_msg "  awaken - tell system-wide jackd to start a poll cycle immediately"
		log_warning_msg "  debug-run [strace [strace options...]] - start a debug run of the"
		log_warning_msg "    system-wide jackd service, optionally running it under strace"
		exit 1
		;;
esac

exit 0

Use this /etc/default/jackd file

# Set to "yes" to start jackd at boot
START_DAEMON=yes

# The jackd process will run under this user
USER=bitlair

# Options to pass to jackd
OPTIONS="-R -d alsa -d jack51 -r 48000 -p 1024 -n 2 -i 2 -o 6"

Use this /etc/asound.conf file

ctl.jack51 {
    type hw
    card 0
    #default:CARD=Audigy
}

pcm.jack51 {
    # "asym" allows for different
    # handling of in/out devices
    type asym
    playback.pcm {
         # route for mmap workaround
         type plug
         #slave.pcm "surround51:CARD=Audigy,DEV=0"
         slave.pcm "surround51"
         slave.channels 6
         route_policy duplicate
    }
    capture.pcm {
        # 2 channels only
        type hw
        card 0
        #type plug
        #slave.pcm "default:CARD=Audigy,DEV=0"
    }
}