Virtual Audio Cable (VAC) is an audio bridge between applications that transmits sounds (audio streams) from app to app, from device to device.

VAC creates a set of virtual audio devices. Each device simulates an audio adapter (usually named a "card") whose output is internally connected to the input, making an audio loopback. If an application plays audio to the output of such device, the sound will not be audible because the signal is looped back to the input. But if another application records from the input, it receives the sound produced by the first app.

Such virtual devices are named Virtual Cables. The term "Virtual Cable" is used only in the description of VAC product, as a placeholder. Actual names of virtual audio devices/endpoints that you will see in applications' menus, are different (for example, "Line 1", "Line 2" etc.).

Each side of any Virtual Cable can be used by several audio apps at the same time. If two or more apps play sounds to the same playback endpoint, these sounds are mixed, and the result is transmitted to the recording side. It two or more apps record from the same endpoint, each app gets a copy of the sound.

Therefore, each Virtual Cable acts as a "meeting point" or a "logistics hub" for the applications.
VAC delivers audio signals completely inside the computer. No audio hardware is required (VAC can be used on a virtual server with no audio adapter).
There is no quality loss (if no format conversion and/or volume control are involved). If all these conditions are met, audio transfer is bitperfect, suitable for audiophile applications. In well-tuned systems, signal latency is very low.
To transfer/route audio signals from an endpoint (device) to another, VAC offers Audio Repeater application.

Applicability
Use VAC with the following audio applications and application classes:
Internet Telephony/VoIP/SIP/voice messengers (Skype, Discord, Ventrilo, MicroSIP).
Live mixing/DJ (vMix, Mixxx, VirtualDJ, VoiceMeeter Banana/Potato).
Live broadcasting (Open Broadcaster/OBS Studio, WireCast, VidBlasterX, SAM Broadcaster).
Speech synthesis/recognition (Google Text-to-Speech/Speech-to-Text, Dragon Naturally Speaking).
Software synthesizers and studio/DAW (Ableton, Acid, AudioMulch, Band-in-a-Box, Bidule, Cakewalk/Sonar, Cubase, FL Studio, GarageBand, Logic, MiniMoog, n-Track, Nuendo, Reaktor, REAPER, Reason, Samplitude, Traktor, Vegas).
Audio editors/recorders (Audacity, Adobe Audition, GoldWave, WaveLab, Sound Forge).
Virtual Machines (VMware Player/Workstation, VirtualBox, Hyper-V).
Amateur and software-defined radio (Flex Radio, PowerSDR, HAM Radio Deluxe, HamSphere, HDSDR, Fldigi, SDR-Radio, WSJT-X, JTDX).
Audio application development - watch the application's audio operations, check audio data played, supply with specific data to be recorded etc.

HOMEPAGE:

https://vac.muzychenko.net/

https://rapidgator.net/file/6894b3d83bd7dd9afede75dfede8b1e3/Virtual_Audio_Cable_4.71.rar

https://nitroflare.com/view/3F7FC9EBA63A7AD/Virtual_Audio_Cable_4.71.rar