Voicemeeter is Audio Mixer Application endowed with Virtual Audio Device used as Virtual I/O to mix and manage any audio sources from or to any audio devices or applications.
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.
Virtual Audio Cable is the definitive audio routing tool for Windows that lets you redirect audio streams between applications and devices on your computer. It enables you to do things like record your speaker output, send an audio stream from a DAW software to a video editor or...
BlackHole is a modern macOS virtual audio driver that allows applications to pass audio to other applications with zero additional latency.
Soundflower is a Mac OS X system extension that allows applications to pass audio to other applications. Soundflower is easy to use, it simply presents itself as an audio device, allowing any audio application to send and receive audio with no other support needed.Discontinued
The project seems no longer developed. Last version, 2.0b2, released in December 2014, can be still downloaded from GitHub.
Create virtual audio devices to take the sound from applications and audio input devices, then send it to audio processing applications. Loopback is a software solution that provides the power of a high-end studio mixing board.
SoundDesk is the easiest way to turn your macOS into a professional mixing desk.
With Audiobus, the revolutionary new inter-app audio routing system, you can connect your Audiobus-compatible music apps together, just like virtual cables.