Mailing Lists
jackaudio@lists.linuxaudio.org
For discussion of the jack server as well as jack applications. If you’re doing anything with jack, you need to be on this list. See linux-audio-dev for email prior to 27 Nov 2001.
linux-audio-user@lists.linuxaudio.org
Not dedicated to JACK alone, but very often you will get help on questions about usage and troubleshooting with JACK here.
IRC
jack @ libera.chat
For those that prefer real-time chat.
Join channel #jack on irc.libera.chat.
linux-audio-users @ libera.chat
For more casual talk, use #lau or #opensourcemusicians channels.
Communities
linuxaudio.org
A general resource for Linux Audio related questions. The WIKI also contains information about JACK and related topics.
linuxmusicians
Provides a discussion forum for Linux audio related topics. Of course JACK included.