sway: replace to Usage:

  wpctl [OPTION…] COMMAND [COMMAND_OPTIONS] - WirePlumber Control CLI

Commands:
  status
  get-volume ID
  inspect ID
  set-default ID
  set-volume ID VOL[%][-/+]
  set-mute ID 1|0|toggle
  set-profile ID INDEX
  set-route ID INDEX
  clear-default [ID]
  settings [KEY] [VAL]
  set-log-level [ID] LEVEL

Help Options:
  -h, --help       Show help options

Pass -h after a command to see command-specific options

Author: Stunkymonkey

sway/config

@@ -48,7 +48,7 @@ exec io.gitlab.news_flash.NewsFlash --headless
 exec sleep 3 && element-desktop --hidden
 
 # mute microfone
-exec pactl set-source-mute @DEFAULT_SOURCE@ 1
+exec wpctl set-source-mute @DEFAULT_SOURCE@ 1
 
 # prevent locking when fullscreen
 for_window [app_id="firefox"] inhibit_idle fullscreen
@@ -134,14 +134,14 @@ bindsym --locked XF86MonBrightnessUp exec brightnessctl set 5%+
 bindsym --locked XF86MonBrightnessDown exec brightnessctl set 5%-
 
 # Pulse Audio controls
-bindsym --locked XF86AudioMute exec pactl set-sink-mute @DEFAULT_SINK@ toggle
-bindsym --locked XF86AudioRaiseVolume exec pactl set-sink-volume @DEFAULT_SINK@ +2%
-bindsym --locked XF86AudioLowerVolume exec pactl set-sink-volume @DEFAULT_SINK@ -2%
+bindsym --locked XF86AudioMute exec wpctl set-sink-mute @DEFAULT_SINK@ toggle
+bindsym --locked XF86AudioRaiseVolume exec wpctl set-sink-volume @DEFAULT_SINK@ +2%
+bindsym --locked XF86AudioLowerVolume exec wpctl set-sink-volume @DEFAULT_SINK@ -2%
 
 # Microphone
-bindsym --locked XF86AudioMicMute exec pactl set-source-mute @DEFAULT_SOURCE@ toggle
-bindsym --locked $mod+XF86AudioRaiseVolume exec pactl set-source-volume @DEFAULT_SOURCE@ +2%
-bindsym --locked $mod+XF86AudioLowerVolume exec pactl set-source-volume @DEFAULT_SOURCE@ -2%
+bindsym --locked XF86AudioMicMute exec wpctl set-source-mute @DEFAULT_SOURCE@ toggle
+bindsym --locked $mod+XF86AudioRaiseVolume exec wpctl set-source-volume @DEFAULT_SOURCE@ +2%
+bindsym --locked $mod+XF86AudioLowerVolume exec wpctl set-source-volume @DEFAULT_SOURCE@ -2%
 
 # Media player controls
 bindsym --locked XF86AudioPlay exec playerctl play-pause