voicemeeter-api-python/examples/observer/__main__.py

import logging

import voicemeeterlib

logging.basicConfig(level=logging.INFO)


class App:
    def __init__(self, vm):
        self._vm = vm
        # register your app as event observer
        self._vm.observer.add(self)

    def __str__(self):
        return type(self).__name__

    # define an 'on_update' callback function to receive event updates
    def on_update(self, event):
        if event == 'pdirty':
            print('pdirty!')
        elif event == 'mdirty':
            print('mdirty!')
        elif event == 'ldirty':
            for bus in self._vm.bus:
                if bus.levels.isdirty:
                    print(bus, bus.levels.all)
        elif event == 'midi':
            current = self._vm.midi.current
            print(f'Value of midi button {current} is {self._vm.midi.get(current)}')


def main():
    KIND_ID = 'banana'

    with voicemeeterlib.api(
        KIND_ID, **{k: True for k in ('pdirty', 'mdirty', 'ldirty', 'midi')}
    ) as vm:
        App(vm)

        while _ := input('Press <Enter> to exit\n'):
            pass


if __name__ == '__main__':
    main()