Although several theories have been put forward, no-one knows exactly how the black box works. What is known is that it will take an audio input and spit out a modified signal.
The rhythmic, choppy, buffered and tempo sync output is especially pleasing on drums, but works for most instruments and vocals too. It has no controls, only a red LED display that runs from 000 to 099, each number would appear to change the algorithmic undertones that affect the things and stuff inside differently. Some of these so-called 'programs' appear to loop the effect, others don't. Sometimes the things are faster and the stuff slower, other times it's the opposite.