NI Audio2dj ~/.asoundrc

gistfile1.txt

# Setup for NI audio2dj
# It's seen by default as 2 different stereo devices by jack.
# This makes it one single 4 output channels device.
# The outputs are then mapped so instead of using a stereo cable in output0,
# I can use 2 mono jack cables in each stereo out, i.e. in L[0] and R[0]
# which are respectively output 0 and 2.

pcm_slave.DJ0 {
    pcm "hw:1"
    format S16_LE
}

pcm.usb {
        type plug
        slave DJ0
}
ctl.usb {
        type plug
        slave DJ0
}

pcm_slave.DJ1 {
    pcm "hw:1"
    format S16_LE
}

pcm.usb1 {
        type plug
        slave DJ1
}
ctl.usb1 {
        type plug
        slave DJ1
}

pcm.multi {
	type multi;

	slaves.a.pcm "hw:1";
	slaves.a.channels 2;

	slaves.b.pcm "hw:1,0";
	slaves.b.channels 2;

	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;
}

ctl.multi {
	type hw;
	card 1;
}

pcm.ttable {
	type route;
	slave.pcm "multi";

	# invert channels a[1] & b[0] so we use one jack mono in A & B instead
	# configure 4 channels to use only 2 but this is for cables reason =)
	ttable.0.0 1; # a.0
	ttable.2.1 1; # b.0
	ttable.1.2 1; # a.1
	ttable.3.3 1; # b.1
}

ctl.ttable {
	type hw;
	card 1;
}