To use Loopback, you must install the ACE backend, which requires administrative permissions on your Mac. While the software is a paid product, it can be downloaded for free from the Rogue Amoeba Support page to run in trial mode, which degrades audio quality after a set period of time. Loopback Release Notes - Rogue Amoeba

: Combining a microphone with music from a media player into a single track for recording.

Loopback allows Mac users to create "Virtual Audio Devices" that take sound from applications (like Safari, Zoom, or Spotify) and hardware inputs (like microphones) and route them to other software. It is essentially a cable-free digital mixing board for your computer. Common use cases for the software include:

: Ensuring system audio is captured during QuickTime screen recordings. Installation and Trial

: This update achieved full compatibility with macOS Ventura, ensuring all audio routing features worked without known issues on the then-new operating system.