Since Ubuntu 22.10, PipeWire replaced PulseAudio as the default sound server.

PipeWire

• Use wpctl status from the command-line to show the status of all devices, sinks etc.
• Use wpctl inspect to show detailed information about a device or a stream.
• Read pipewire.conf on how to configure the pipewire daemon.

PulseAudio

• You can use pavucontrol to precisely control PulseAudio streams and output devices from your GUI.
• Use pactl info from command-line to show the precise status of the audio pipeline.
• Edit /etc/pulse/server.conf to change the PulseAudio server configuration (e.g. samplerate and the number of bits)