It was designed to be a no-nonsense and straightforward, which makes it usable not only by seasoned audio professionals but also novices who just want to re-route audio signal from one app to another. Using it you can route an audio signal between apps without the need to use external audio hardware, audio cables or any other software or equipment. Soundflower for Mac is a powerful lightweight macOS Kernel extension that can create a virtual audio device with full support for inputting and outputting sound to any of your active apps.