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The Jack OS X team (Stephane Letz, Johnny Petrantoni, and Dan Nigrin) have released of a new version of Jack OS X, a Mac OS X implementation of the Jack Audio Connection Kit (Jack).

Jack is a low-latency audio server, that connects any number of different applications to a single hardware audio device; it also allows applications to send and receive audio to and from each other. Jack has been designed from the ground up to be suitable for professional audio work. It focuses on two key areas: synchronous execution of all clients, and low latency operation.

This new version includes several improvements and new features:

  • New, more CPU-efficient CoreAudio driver
  • New NetJack UDP module for JackPilot, to allow for Jack audio connections over a network (including Ethernet, Airport, IP over Firewire)
  • Workaround for "the iTunes problem", in which some applications (like iTunes) are dropped from the Connections Manager window when they stop actively sending audio, thus destroying any connections already established with that application. The workaround restores the connection state of the application in question when the audio stream is resumed
  • Various Jack Audio Router (JAR) bug fixes
  • New Jack VST and AU plugin design; AU plugin now passes current Apple AU validation test
  • Developer toolset added, which allows for both "Apple" and "Unix" approaches to developing Jack native applications on Mac OS X
  • Inclusion of step-by-step illustrated examples in documentation
  • Italian and French localization of JackPilot

Jack OS X is open source and available for free download.

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