File 40-alsa.rules of Package alsa
SUBSYSTEM=="sound", GROUP="audio" SUBSYSTEM=="snd", GROUP="audio" KERNEL=="controlC[0-9]*", NAME="snd/%k" KERNEL=="hwC[D0-9]*", NAME="snd/%k" KERNEL=="pcmC[D0-9cp]*", NAME="snd/%k" KERNEL=="midiC[D0-9]*", NAME="snd/%k" KERNEL=="timer", NAME="snd/%k" KERNEL=="seq", NAME="snd/%k" SUBSYSTEM=="sound", KERNEL=="controlC?", RUN+="/usr/sbin/alsa-init %n"