# class Notifier

###

Module | phonon
Namespace | Phonon::BackendCapabilities
Class | Notifier
Inherits | QObject

\class Notifier backendcapabilities.h Phonon/BackendCapabilities Notifications about backend capabilities.

### methods

- availableAudioCaptureDevicesChanged ( )

  returns Nothing
  SIGNAL ("availableAudioCaptureDevicesChanged ()")

  This signal is emitted when audio capture devices were plugged or unplugged.

  Check BackendCapabilities.availableAudioCaptureDevices to get the current list of available devices.

- availableAudioOutputDevicesChanged ( )

  returns Nothing
  SIGNAL ("availableAudioOutputDevicesChanged ()")

  This signal is emitted when audio output devices were plugged or unplugged.

  Check BackendCapabilities.availableAudioOutputDevices to get the current list of available devices.

- capabilitiesChanged ( )

  returns Nothing
  SIGNAL ("capabilitiesChanged ()")

  This signal is emitted if the capabilities have changed. This can happen if the user has requested a backend change.