Loopback is not available for Linux but there are a few alternatives that runs on Linux with similar functionality. The best Linux alternative is JACK Audio Connection Kit, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to Loopback and three of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to Loopback are Helvum and PulseMeeter.
JACK 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. The API can be used through either JACK1 or JACK2.
A frontend to ease the use of pulseaudio's routing capabilities, mimicking voicemeeter's workflow.
United States
super lite and opensource, also paying attention to latnecy