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.
JACK Audio Connection Kit vs Loopback opinions
super lite and opensource, also paying attention to latnecy
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...
VB-Audio CABLE is a Windows Audio Driver working as a Virtual Audio Cable. After installing the VB-CABLE driver, a new playback device appears in the audio device list and can be set as default device. VB-CABLE can be set as the default device, just like any regular audio device.
VB-Audio Virtual Cable vs Loopback opinions
Though only available on Windows, VB-Audio Virtual Cable offers equivalent functionality to what Loopback offers macOS, with support for audio signal routing and passthrough, recording, and multichannel support.
Synchronous Audio Router is a software-based audio routing driver for Windows. You can create any number of Windows audio endpoints, either playback or recording, and route them using any digital audio workstation software which supports ASIO, all with low latency.Discontinued
The last version (0.13.1) was released in April 2018. Many issues in the repository going unanswered.
Total Recorder is a multi-purpose audio and video recording software program with a wide variety of editing and sound processing capabilities. Total Recorder is distributed in the following editions: Standard Edition (SE), Professional Edition (PE), VideoPro Edition (VE), and...
Usually, all programs send their audio output to your soundcard independently. With Virtual Audio Stream you can route the output signal of any application to be the input signal of any other application.