Callback receiving playback device status notifications.
Return the names of available playback devices.
Return the system's default playback device name, or undefined if unavailable.
Return the current playback device name, or undefined if unavailable.
Return the current device sample rate in Hz, or undefined if unavailable.
Return whether the current device follows the system default.
Switch to the named playback device and return whether it succeeded.
Switch to the system's default playback device and report success.
Switch to a null device with no sound output and return whether it succeeded.
Set the device notification callback; undefined or null removes it.
Lifecycle notifications for the audio playback device.