The Headacher has packaged Jack, QJackctl and Portaudio, all of which can be downloaded from the testing repo:
jack: JACK (Audio Connection Kit)
jack: JACK is a low-latency audio server. It can connect several client
jack: applications to an audio device, and allow them to share audio
jack: with each other. Clients can run as separate processes
jack: like normal applications, or within the JACK server as "plugins".
jack: Website: http://jackaudio.org/
jack: GNU GPL
jack: Author: Paul Davis
qjackctl: qjackctl (application to control the JACK sound server daemon)
qjackctl: Qjackctl provides a simple GUI dialog for setting several
qjackctl: of JACK daemon parameters, which are saved between sessions.
qjackctl: The most important feature of qjackctl is that it allows you to
qjackctl: easily connect programs that use jack to eachother.
qjackctl: It also shows some info about the status of jackd
qjackctl: Website: http://qjackctl.sourceforge.net
qjackctl: License: GNU gpl v2
qjackctl: Authors: Rui Nuno Capela <email@example.com>
portaudio: portaudio (portable audio library)
portaudio: PortAudio is a portable Real-Time Audio Library,
portaudio: provides the same audio API on Linux, Windows,
portaudio: as well as MacOS platforms.
portaudio: Website: http://www.portaudio.com//
portaudio: License: Free
portaudio: Authors: Phil Burk and Ross Bencina
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