The Kaossilator features one hundred programs, which are mostly synthesizer voices and sound effects, including acoustic (guitar, trumpet, piano), percussion, and electronic sounds. The last 10 programs are complete rhythm-patterns, but since percussion sounds are included in the programs, users can develop their own rhythm-patterns by layering multiple overdubbed sounds. Programs are indicated only by a letter-and-two-digit designation on the LED display but are given specific names in the instructions.[1] Most instruments can be locked into various keys and scales. The Kaossilator supports 31 different scale patterns including chromatic, blues and diatonic scales as well as more exotic scales such as Japanese and Egyptian.