Trinity Audio Group has introduced Indamixx, a hand-held audio studio designed to let you record, edit, mix, DJ and publish songs or sound files on the go.
The Indamixx touchscreen allows hands-on fader control with group-based automation in the Ardour DAW, as well as beatmixing and pitch adjustment in Mixxx, the digital DJ application.
Indamixx ships with [...]

Sonic Visualizer, a free application designed to make exploring audio data as fun as possible, has been updated.
Sonic Visualiser will be of particular interest to musicologists, archivists, signal-processing researchers and anyone else looking for a friendly way to take a look at what lies inside the audio file.
Sonic Visualiser has powerful annotation capabilities to help [...]

terminatorX is a realtime audio synthesizer that allows you to “scratch” on digitally sampled audio data (*.wav, *.au, *.ogg, *.mp3, etc.) the way hiphop-DJs scratch on vinyl records.
It features multiple turntables, realtime effects (buit-in as well as LADSPA plugin effects), a sequencer and MIDI interface - all accessible through a gtk+ GUI. This software is [...]

Ardour 2.4, the latest version of the free digital audio workstation for Linux & OS X, is finally released. 
Features

on OS X, direct support for import of all file types supported by CoreAudio, including MP3 and AAC. Linux users can take comfort: there is ongoing work to offer similar capabilities on their platform.
per-track faders in editor [...]

The Renoise Team has announced the first ever public Renoise demo for Linux.
As a Linux user you may appreciate Renoise’s hands-on and fundamental approach to music production. For those on other platforms, now is the chance to experience Renoise on the operating system that has become famous for its flexibility and stability.
It’s great to see [...]

The School of Audio Engineering (SAE) has announced that it will become a corporate sponsor of Ardour, an open source digital audio workstation project. The sponsorship ensures continual development of Ardour as a free, community-based audio recording and production software.
Ardour has previously received corporate support from Solid State Logic and Harrison, but has primarily relied [...]

NOTAM, the Norwegian production centre for work with sound, has released a new version (1.1.1) of NOTAM’s DSP02 software for Mac OSX, Windows, Linux and web-based use. The new version of DSP02 brings performance improvements and user interaction enhancements as well as support for Intel Mac.
For educators, composers, musicians, and others working with children, who [...]

XT Software has announced the community-based energyXT2 MIDI & audio sequencer for Windows and Linux is to be released on Friday the 15th of June.
energyXT2 highlights:

Available both as DAW and VST plugin
All-in-one synth/sampler, multi-fx and sequencer
Streamlined workflow and design

Whats new in energyXT2:

100% re-worked, based on over 3 years of feedback from users
High quality time-stretching and [...]

Fervent Software has announced the immediate availability of Studio to Go! v2.0.
The Studio to Go! software series provides a complete introduction to the world of Linux Audio and features a integrated audio and compositional environment on a single bootable disk.
The 2.0 release includes many usability improvements, and provides the latest Linux Audio applications, including support [...]

Musikmesse Update: Lionstracs announced the Mediastation X-76, a next generation music workstation & performance keyboard that looks like it will be a direct competitor to the OpenLabs line of keyboard computer workstations.
The Mediastation is based on Linux and AMD’s 32-bit Athlon or 64-bit Opteron CPUs. It is designed for live performers, one-man bands, disc jockeys, [...]