/etc/init/alsa-restore.conf is in alsa-utils 1.0.25-1ubuntu5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 | # alsa-restore - restore sound card(s') mixer state(s)
#
# This task restores the sound card(s') mixer state(s) to
# /var/lib/alsa/asound.state on startup
description "restore sound card(s') mixer state(s)"
start on runlevel [2345]
task
exec /sbin/alsactl restore
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