JACK Audio Connection Kit (or JACK; a recursive acronym) is a professional sound server daemon that provides real-time, low-latency connections for both audio and MIDI data between applications that implement its API. Developed by JACK team
License: Open Source
Soundflower is a user-friendly virtual audio routing tool primarily for macOS, suitable for basic tasks but limited in features and support. In contrast, JACK Audio Connection Kit offers advanced audio routing capabilities with cross-platform support, making it ideal for complex audio setups but requires a more in-depth understanding to use effectively.