@startuml
title "UCM volume"

start
if (Card state (/var/lib/alsa/asound.state)) then (not present)
  :UCM: BootSequence;
else (present)
  :alsactl: Restore state (from asound.state);
endif
:UCM application:set device volume;
note right
  The application uses (Playback|Capture)MixerElem or
  (Playback/Capture)(Volume/Switch) values to get
  the controls.
end note
:alsactl: Store state (to asound.state);
stop

@enduml