XAS
Iannis Xenakis (1987) Work for chamber orchestra
Xi, Op. 1 ex55
Karlheinz Stockhausen (1986) Work for chamber orchestra
XII rondino's faciles et doigtés sur des motifs favoris de Mozart et Rossini, Op. 593
Carl Czerny Work for soloist
X.Y., Op. 31 list 1
Béla Bartók (1894) Work for soloist