iso-profiles/mabox-pl/desktop-overlay/etc/skel/.config/xfce4/xfconf/xfce-perchannel-xml/xfce4-volumed-pulse.xml

<?xml version="1.0" encoding="UTF-8"?>

<channel name="xfce4-volumed-pulse" version="1.0">
  <property name="icon-style" type="uint" value="0"/>
  <property name="volume-step-size" type="uint" value="5"/>
</channel>