The Mayhem VST plug-in suite is a collection of four different effects designed exclusively for the abuse of your audio. Included in this package are:

Filterpod: A screaming low-pass filter with LFO
Crush: In either mono, dual mono, or stereo, the World's Most Dangerous Compressor
Master Destrukto: A plug-in featuring four different distortion algorithms for massive audio manipulation
TimeFnk: A rhythmic delay unit with sample rate reduction and LFO-driven panning and filter

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Crush is a pair of compressors designed for getting that "Full Canada" drum sound. They don't try to hide compression artifacts, but instead embrace them. These two will absolutely flatten anything you put through them. Especially tasty on vocals!