Integrate BackgroundMusic BGMDriver standalone in a macOS app

[lbdremy]

Hello @kyleneideck,

Thanks for putting this great software open source !
I'm investigating BackgroundMusic to integrate in a macOS app, my objective is to record the system sound so I think I only need the BGMDriver.

I was able to build a custom BGMDriver thanks the instructions, install the driver and record the system audio using the newly created audio device but without BGMApp the audio output is only played on the BackgroundMusic audio device not on the headphones or the speaker, and I need the audio output to be played there too.

If I understood it well there is a couple of kAudioDevice(Custom)Property which can be set to configure the device:

1. Is it possible to configure the device to play/forward the captured audio on another output device using one of these property or with another technique ?
2. Do you have any pointers or instructions on how to communicate with the audio device to set those custom properties ? Would it work like standard property (like done here for example https://github.com/karaggeorge/macos-audio-devices/blob/master/Sources/audio-devices/AudioDevices.swift ) ?

Thanks a lot for your help :)