VB-Audio VoiceMeeter 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 VB-Audio VoiceMeeter and three of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to VB-Audio VoiceMeeter are PulseAudio and volctl.
VB-Audio VoiceMeeter is mainly a Audio Recorder but alternatives to it may also be Audio Routers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of VB-Audio VoiceMeeter.
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.
JACK Audio Connection Kit vs VB-Audio VoiceMeeter opinions
Some users think JACK Audio Connection Kit is a great alternative to VB-Audio VoiceMeeter, some don't.
Applications need to be Jack aware or you can't use them.
PulseAudio is a sound system for POSIX OSes, meaning that it is a proxy for your sound applications. It allows you to do advanced operations on your sound data as it passes between your application and your hardware.
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.