VB-Audio VoiceMeeter is not available for Linux but there are some 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 25 alternatives to VB-Audio VoiceMeeter and seven of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to VB-Audio VoiceMeeter are PulseAudio, PulseMeeter, qpwgraph and Helvum.
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.
Most users think JACK Audio Connection Kit is a great VB-Audio VoiceMeeter alternative.
PulseAudio is a sound server system for POSIX OSes, meaning that it is a proxy for your sound applications. It is an integral part of all relevant modern Linux distributions and is used in various mobile devices, by multiple vendors.
A frontend to ease the use of pulseaudio's routing capabilities, mimicking voicemeeter's workflow.
Volctl - Volume Control per application from System Tray for Linux
Volctl is a free and opensource app for Linux writen in python and gtk+ and that can be used to control volume per application and for enabled pulseaudio outputs from the system tray.
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Applications need to be Jack aware or you can't use them.