If you're looking for help regarding an Ubuntu feature, please search within the Ubuntu Forums.
For general Linux Audio help, use the LinuxMusicians Forums or LinuxAudio Mailing List.
You can also use IRC on irc.freenode.net (or .com) server, channel #kxstudio or #opensourcemusicians.
A discord server is also available here, in case you prefer that over IRC.
(The discord server is going away quite soon though, as we do not want to encourage usage of proprietary systems)

Documentation

Please note that documentation for KXStudio is a work in progress, if you need some information not available here, you can try:

• LinuxAudio Wiki
• UbuntuStudio Community Documentation

Some useful topics:

KXStudio Repositories

• Available Meta-Packages

KXStudio Manual

• Introduction
• KXStudio and Free Software
• Downloading, booting and running KXStudio 'live'
• Installing KXStudio
• Package Management
• Installing non-free video drivers
• Included and recommended apps
• Linux Audio Overview
• ALSA and KXStudio
• An introduction to Cadence
• JACK Configuration
• Creating a simple LADISH studio using Claudia
• Latency compensation and xrun reduction tips
• WineASIO and REAPER
• Useful Links And Getting Help

(The manual is being written by Dan MacDonald with the assistance of Aaron Wolf, falkTX and the LinuxMusicians community).