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JACK Audio Connection Kit

JACK Audio Connection Kit
Original author(s) Paul Davis, Stéphane Letz
Developer(s) JACK team
Stable release

(JACK1) v0.124.1 (January 22, 2014; 3 years ago (2014-01-22))

(JACK2) v1.9.10 (July 20, 2014; 2 years ago (2014-07-20))
Written in C,C++
Operating system BSD, Linux, macOS, Solaris, Windows, iOS
Type Sound server

(JACK1) v0.124.1 (January 22, 2014; 3 years ago (2014-01-22))

JACK Audio Connection Kit (or JACK; a recursive acronym) 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. JACK has been developed by a community of open-source developers led by Paul Davis (who won an Open Source Award in 2004 for this work) and has been a key piece of infrastructure and the de facto standard for professional audio software on Linux since its inception in 2002. The server is free software, licensed under the GNU GPL, while the library is licensed under the more permissive GNU LGPL.

JACK can use ALSA, PortAudio, CoreAudio, FFADO and OSS as hardware back-ends. Additionally, a dummy driver (useful if no sound output is desired, e.g. for offline rendering) and an Audio-over-UDP driver exist. It runs on Linux, macOS, Solaris, Windows, iOS, FreeBSD, OpenBSD and NetBSD. The JACK API is standardized by consensus, and two compatible implementations exist: jack1, which is implemented in plain C and has been in maintenance mode for a while, and jack2 (originally jackdmp), a re-implementation in C++ led by Stéphane Letz, which is under aggressive development and has introduced multi-processor scalability and support for operating systems other than Linux.



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