Noise compositons that can have steady, or abstract beats. Lots of feedback, noise machines. Vocals are sometimes used, but are more common in industrial. Vocals in machine music are usually heavily distorted and beats are more abstract. Broad spectrum of effects are used to obtain sounds.
Abstract beats are usually common here.
There are computer programs, and various pieces of electronic equipment involved. Again, the sheer possibilites can result in genius compositions. These ill fated audio clips usually get chopped up and pasted together with others, to form an interesting collage of disjointed words and phrases usually unified for the purpose of poking fun at society. There are also slow psychedelic winding hypnotic possibilities as well. Take the rock you know hack it up mix it around and add some freedom and pent up creativity.