yambar-modules-pulse(5)

Tags

Name	Type	Description
online	bool	True when connected to the PulseAudio server
sink_online	bool	True when the sink is present
source_online	bool	True when the source is present
sink_percent	range	Sink volume level, as a percentage
source_percent	range	Source volume level, as a percentage
sink_muted	bool	True if the sink is muted, otherwise false
source_muted	bool	True if the source is muted, otherwise false
sink_port	string	Description of the active sink port
source_port	string	Description of the active source port

Name	Type	Req	Description
sink	string	no	Name of sink to monitor (default: @DEFAULT_SINK@).
source	string	no	Name of source to monitor (default: @DEFAULT_SOURCE@).

bar:
  left:
    - pulse:
	    content: 
		  string: {text: "{sink_percent}% ({sink_port})"}

2 releases since Debian 12 (Bookworm); the text changed 1 time.