Regaining usage of volume control media keys after removing pulseaudio

ArchWiki page provided explanations, and creating the following files worked for me:

/etc/acpi/actions/volume

#! /bin/sh
step=5
case $1 in
  -) amixer set Master $step-;;
  +) amixer set Master $step+;;
esac

/etc/acpi/events/volume_down

event=button/volumedown
action=/etc/acpi/actions/volume -

/etc/acpi/events/volume_up

event=button/volumeup
action=/etc/acpi/actions/volume +

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