make_asoundrc.bash

#!/bin/bash

dj_dev=`aplay -l | grep Audio4DJ | grep "device 0" | cut -d\  -f 2 | cut -d: -f 1`

HAS_A4DJ=1
if [ "$dj_dev"x == "x" ] ; then
   echo "Audio4DJ not found"
   HAS_A4DJ=0
fi

cat << EOF > ~/.asoundrc
#
#This file was generated by $0 -- do not edit by hand (it will get overwritten!)
EOF

if [ $HAS_A4DJ == "1" ] ; then
cat << EOF >> ~/.asoundrc

###
### Begin Audio 4 DJ Section
###

pcm.AUDIO4DJ {
    type multi;
    # bind hardware devices
    slaves.a.pcm "hw:$dj_dev,0,0";
    slaves.a.channels 2;
    slaves.b.pcm "hw:$dj_dev,0,1";
    slaves.b.channels 2;
    # bind channels to virtual device;
    bindings.0.slave a;
    bindings.0.channel 0;
    bindings.1.slave a;
    bindings.1.channel 1;
    bindings.2.slave b;
    bindings.2.channel 0;
    bindings.3.slave b;
    bindings.3.channel 1;
}

# JACK will be unhappy if there is no mixer to talk to, so we set
# this to card 0. This could be any device but 0 is easy.

#note that audio4dj is actually card 1!

ctl.AUDIO4DJ {
        type hw;
        card 0;
}

# This creates a 4 channel interleaved pcm stream based on
# the multi device. JACK will work with this one.

pcm.ttable {
        type route;
        slave.pcm "AUDIO4DJ";
        slave.channels 4;
        ttable.0.0 1;
        ttable.1.1 1;
        ttable.2.2 1;
        ttable.3.3 1;
}
# see above.
ctl.ttable {
        type hw;
        card 0;
}

pcm.AUDIO4DJ_A {
        type route
        slave {
                pcm "plughw:$dj_dev,0,0"
                channels 2
        }
        ttable.0.0 1
        ttable.1.1 1
}

ctl.AUDIO4DJ_A {
        type hw;
        card 0;
}

pcm.AUDIO4DJ_B {
        type route
        slave {
                pcm "plughw:$dj_dev,0,1"
                channels 2
        }
        ttable.0.0 1
        ttable.1.1 1
}

ctl.AUDIO4DJ_B {
        type hw;
        card 0;
}
EOF
fi