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Virtual Audio Cable (VAC)

20+ years of experience. Connects audio apps together since 1998.


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LATEST VERSION: 4.70

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.

 

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:



Warning: in the Internet, there are several other products using the name
"Virtual Audio Cable". Some of them use this name just for promotional purposes,
but some others are completely fake and contain malware. If you decide to try
them, don't forget to check their sites/binaries with anti-malware
software/services.


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.


COMPATIBILITY

VAC works in Windows XP, Vista, 7, 8, 8.1, 10 and 11.


NO OBSESSIVE ACTIVITY

VAC just performs things what it is intended for: passes audio streams between
applications, converting audio formats if necessary. It never guides you to
advertising pages, nor pops up busily on the screen, nor installs hidden
activities in your system. VAC does only actions that you explicitly demand for.


DATA POLICY

VAC driver and the supplied applications can only collect and use information
directly related to their functionality. For example, VAC driver can query
processor functions to optimize performance, request process/thread information
to display it in a log, Audio Repeater applications request audio
device/endpoint properties, etc. Since they do not work with personal, business,
geographical, economic or political data, they do not access such data sources
at all.

VAC driver and the supplied applications do not access network functions at all.
Thus, it is technically impossible for them to send or receive data over a
network, whether local or global.


OLDER VERSIONS

VAC 4 works only under Windows versions starting from XP (5.1). For support of
older Windows releases, please visit VAC 3 page.

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