How can I listen event of Switching current default audio device?

[tihoangyeudau]

I want to listen event of Switching default audio device in win32, how can i do? thank you so much?

[TJ-59]

MMNotificationClient from pycaw.callbacks (which you should inherit in your own class unless you only want the basic prints for dev purpose, if it even have any), it has on_default_device_changed(), on_device_added(), on_device_removed(), on_device_state_changed(), and on_property_value_changed().

You probably want on_default_device_changed().
It would trigger for both eRender and eCapture, and on different roles as well, meaning it could show a change in default speakers as well as a change in default microphone, both for multimedia use or for communication use.

def on_default_device_changed(flow, flow_id, role, role_id, default_device_id):
    Is fired, when the default endpoint device for a role changed.
    flow : str
        String explaining the data-flow direction.
    flow_id: int
        Id of the data-flow direction.
    role : str
        String explaining the role of the device.
    role_id: int
        Id of the role.
    default-device_id: str
        String containing the default device id.

Roles = ["eConsole", "eMultimedia", "eCommunications", "ERole_enum_count"]
DataFlow = ["eRender", "eCapture", "eAll", "EDataFlow_enum_count"]