Free Download Rogue Amoeba Loopback full version standalone offline installer for macOS. It's a cable-free audio routing for Mac.
Overview of Loopback for macOS
This application makes it easy to pass audio from one application to another. It can combine audio from application sources and audio input devices, making it available anywhere on your Mac. The easy-to-understand, wire-based interface gives you all the power of a high-end studio mixing board inside your computer.
Users can pull audio from multiple sources into one virtual device. On top of that, Add the applications and physical audio devices you want to include to the Sources column.