The synthesis unit has a 16-note polyphony and 8-instrument multitimbral capability. The unit contains 100 preset instruments stored on ROM and an additional 100 user-configurable sounds. Multiple sounds can be layered into so-called performances to provide more interesting sounds than one instrument could provide alone. One common way to use this feature is to include several instances of the same instrument in the same performance while detuning each of them slightly to create a "thicker" or more lively sound. e.g. you can layer or split (i.e. zone) the keyboard with up to 8 different (or same) "Single" voice patches to create a "Performance" patch which can result in very lush, complex and unique tones from just this one instrument.