KXStudio 12.04.3 is an ISO release based on Ubuntu 12.04.3 LTS, made on 17/10/2013.
Check the Live-DVD section in the Downloads page to download it (or just click here).

The Live-DVD contains a highly optimized KDE desktop (version 4.11.1), together with a low-latency kernel (version 3.8).
There's a lot of audio-related applications inside, with even more available to install via the repositories.

The live system is based upon Kubuntu code with only a few tweaks (like auto-adding the live user to audio and video groups).
Due to a Kubuntu backports issue is not possible to use Ubuntu's "LTS Enablement Stack", so the regular Xorg version is used.

Pre-installed applications

The list of pre-installed applications in the ISO follows, not listing audio plugins.

Audio         Other
  • Ardour3
  • Audacious
  • Audacity
  • Bristol
  • Cadence (and sub-tools)
  • Carla
  • Giada
  • Guitarix
  • Hydrogen
  • Jamin
  • Laborejo
  • LinuxSampler
  • LisaloQt
  • LMMS
  • Mixxx
  • MusE
  • Non-Mixer
  • Non-Sequencer
  • Non-Session-Manager
  • Non-Timeline
  • Petri-Foo
  • Phasex
  • Qsampler
  • Qsynth
  • Qtractor
  • Rakarrack
  • Renoise
  • Rosegarden
  • SEQ24
  • SooperLooper
  • Sunvox
  • VMPK
  • xjadeo
  • ZynAddSubFX
        
  • Blender
  • Clementine
  • Digikam
  • Firefox
  • Gimp
  • gparted
  • Inkscape
  • KDE base (ark, dolphin, gwenview, k3b, etc)
  • Kdenlive
  • LibreOffice (Impress and Writer)
  • Muon
  • QdvdAuthor
  • SMPlayer
  • Synaptic
  • VLC
  • Wine