BIAS has announced that it is now shipping Peak 4, the new version of the company’s stereo waveform editing application for the Mac. Peak 4 offers several new features and enhancements, including support for Audio Unit plug-ins (Apple’s new audio plug-in standard for Mac OS X), Multi-processor support, Redbook CD burning from directly within the Peak application, a host of new DSP tools, and more. In addition, Peak 4’s user interface has been streamlined, and sports a new brushed metal look. Peak 4 is now a Mac OS X-only application, and is priced at US$499 ($149 upgrade).