Changes for 15.04
Aside from a bunch of updated packages, we now have a new meta package called ubuntustudio-audio-core, which has all the essential parts for an audio oriented installation.
For more details on the latest updates for our desktop, such as xfce 4.12 - much of it correlates with Xubuntu, and therefore, please have a look at the release notes for Xubuntu 15.04.
You may also want to see the release notes for Ubuntu 15.04.
You can download our ISO images from these two links:
For more download choices, visit: http://cdimage.ubuntu.com/ubuntustudio/releases/15.04/release/