Rob Williams' Blog: Interesting, not only on Java, but on a bunch of other topics. The music section is especially related to "real" music (in my understanding), not pop muzak.
Jm-Etude is a jMusic wrapper for the processing environment. It provides a high level API to communicate with jMusic therefore it makes it more easy to programm music composition with processing. jMusic itself is a solid framework for computer-assisted composition in Java, it is also used for generative music, instrument building, interactive performance and music analysis. If you are interested to find out more about jMusic, visit the project homepage
The tutorials cover topics including music software design, audio
synthesis, digital signal processing, compositional systems,
and computer programming concepts.
They draw upon the design and pedagogical skills of digital
instrument makers from Australian Universities, with advice from
experienced music software developers.
We hope that you find them useful if you are a musician or
software programmer interested in making music software and,
as a freely available resource, this site will provide support for
enthusiasts and professionals in Australia and around the world.
The tutorials on this site focus on software development using the
jMusic software toolkit, an open-source software library in
the Java language. In the future this site may hold parallel tutorials
in other software development environments, such as Max/MSP.