JACK Audio Connection Kit vs VB-CABLE

JACK Audio Connection Kit is a free sound server API and daemon implementation for connecting audio and MIDI applications with real-time, low-latency operation. Client applications can connect to an audio device and share audio with one another. JACK emphasizes synchronous execution among clients. Applications communicate through callbacks and registered ports to send and receive data, and audio is represented internally as 32-bit floating-point values. Compatible applications listed by the project include Audacity, Ardour, Blender, Mixxx, QjackCtl, and VLC. JACK is available for Linux, macOS, and Windows. Linux users are directed to their distribution’s package manager for binaries; listed macOS installers are for macOS 10.12 or higher, and Windows installers are for Windows 7 or higher. The project hosts JACK1 and JACK2 source repositories on GitHub. The server uses the GPL, while the library uses the LGPL, which permits proprietary programs to link with it. The project directs users to mailing lists, IRC channels, and community forums for help. The software is distributed without warranty, including implied warranties of merchantability or fitness for a particular purpose.

VB-CABLE is a virtual audio device that passes sound from its CABLE input to its CABLE output, linking a player application with a recorder application. VB-Audio says it can work without configuration and supports Windows audio applications using MME, KS, DX, WaveRT, or WASAPI. Input accepts 16- or 24-bit audio at 44.1–192 kHz with one to eight channels, while output conversion occurs automatically when needed. Drivers cover Windows XP SP2 through Windows 11, including 32- and 64-bit systems and Windows 10/11 Arm64, plus macOS 10.10 and later on Intel and Apple Silicon. Separate A+B and C+D packages connect more applications. The software is donationware: its free download is available, and users choose whether to pay. Listed professional or server licenses cost $5 as a one-time purchase for Windows and $5, paid once for macOS, with volume licensing available. Windows setup requires extracting the ZIP, running setup as administrator, and restarting.