“Vocalise” is a song by Sergei Rachmaninoff, composed and published in 1915 as the last of his 14 Songs or 14 Romances, Op. 34. Written for high voice (soprano or tenor) with piano accompaniment, it contains no words, but is sung using only one vowel of the singer’s choosing. It was dedicated to soprano singer Antonina Nezhdanova. It is performed in various instrumental arrangements more frequently than in the original vocal version.