FFTea is a real time high resolution spectrum analyser for MacOS X. It was born as a debugging tool for a sound driver, then it degenerated into something that eats enough CPU, memory and graphic card power to be worthy of release to the unsuspecting world.
It is a surprisingly interesting way to "look" at music, you can see the tempo, melody, bass lines, various instruments (and their harmonics) and balance just at a glance. In fact with little training you can read very interesting things in there. It's also an invaluable tool to pick out stray frequencies, noise sources, clicks and artefacts from a mix.

Prosoniq announces the immediate availability of the new MPEX2 library from their MPEX technology web. Version 2.2 dramatically improves performance for some quality levels, fixes compatibility problems that were reported with 96kHz files and enhances accuracy when processing very long files. The documentation was rewritten to be more comprehensive and a full-featured Mac test project has now been included with the library.

Prosoniq is taking NorthPole development one step further by coming out with a fully functional, entirely free version of NorthPole for VST X and RTAS under MacOS 9 and MacOS X.
NorthPole RTAS and VST is available as a single download.

Rogue Amoeba Software is announcing the immediate availability of Detour, a new audio utility for Mac OS X. Detour provides the ability to choose the audio output device and relative volume for all of your applications. Users owning MiniDisc players will also appreciate Detour's ability to send the audio from a single application directly to the MiniDisc for recording.
A Detour 1.0 for OS X 10.2 and up is immediately available for download and purchase. Detour is $12 shareware, with an introductory price of $10 through July 31st.

The VST to AudioUnit Adapter is a plug-in wrapper that allows users of AudioUnit-compatible applications on the Mac OS X platform (Logic 6, Digital Performer 4 and others) to integrate OS X compatible VST plug-ins seamlessly in to their working environment. It has been successfully tested with Prosoniq plug ins by the manufacturer of the adapter software.