Soundhack has released public beta 3 of the Freesound Bundle, a collection of five freeware Audio Unit effect plugins for Mac OS X.

The Freesound Bundle includes:

• +chebyshev: A distortion unit which uses various low-order chebyshev polynomials to add even or odd harmonic distortion.
• +compand: A combined compressor/expander plugin. It has a soft-knee control as well as a switchable RMS/peak level detector.
• +decimate: Bit depth and sample rate reduction for added aliasing and decimation noise.
• +matrix: A mid-side to left-right encoder and decoder. For mid-side microphone arrays, but also useful when needing to apply effects to only the center or the sides of a stereo mix.
• +phasescope: The standard studio tool for seeing the phase relation between your left and right channels.

The Freesound Bundle is available for both PowerPC- (10.3+) and Intel-Macs (10.4+).