Arch Linux .asoundrc file for firefox audio without pulseaudio

.asoundrc

## TESTING
# $ aplay -l  # show device details
# $ aplay -lL # more deets
# $ cat /proc/asound/card*/id # to get human readable card names e.g.
# CODEC -> usb mixer
# NVidia -> displayport/hdmi monitor
# Generic -> motherboard headphones / mic / line out
# C930e -> usb web camera

# $ aplay /usr/share/sounds/alsa/Front_Center.wav # to test playback from default output device

# arecord --duration=3 --format=dat mic-check.wav # to test recording from default capture device
# aplay mic-check.wav

## CONFIG
pcm.!default
{
  type asym

  playback.pcm {
    type plug
    slave.pcm "dmix:NVidia,7"
  }

  capture.pcm "hw:CODEC,0"
}

## To make `alsamixer` default to whatever device you want
ctl.!default {
  type hw
  card NVidia
}