E-mu Systems came to prominence in the early 1980s with their relatively affordable Emulator sampler, and subsequently pioneered sample-based synthesis technology with the Proteus range. The Planet Phatt was part of that range (1997). Unlike the true synthesiser, sample-based equipment does not derive its raw sounds from electronic oscillators but from recorded sounds held in read-only memory (ROM) chips. These sounds may then be layered, filtered, modulated by low frequency oscillation and shaped by envelopes. However, unlike a true sampler, such devices do not allow the user to record sounds but instead offer a range of factory sounds suitable for any given use. This type of sound production dominated electronic music production for several years in the late 20th century. The synthesizer does have 8 MB ROM contains 480 samples coded at 16 bits at 39 kHz frequency rate. Some names stands out like Roland TB303, Moog Minimoog bass, Wurlitzer piano, YamahaDX7, Prophet 5 and boom-kit Roland TR808.