sixxen/ˈsɪksən/EtymologyBlend of six + Xenakis, after Greek composer Iannis Xenakis, who in 1978 composed a piece for six percussionists involving the instrument.sixxen means A microtonal hammered keyboard percussion instrument. Lexicurio rates it Sui generis — a strength score of 100 out of 100.sixxen is pronounced /ˈsɪksən/.nounA microtonal hammered keyboard percussion instrument.