Sibelius' only string quartet from his maturity premiered in Helsinki in April 1910. It is divided into five movements:
Andante – Allegro molto moderato
Vivace
Adagio di molto
Allegretto (ma pesante)
Allegro
Lyrics for this song have yet to be released
Voces intimae, Op. 56 was written by Jean Sibelius.
Jean Sibelius released Voces intimae, Op. 56 on Mon Apr 25 1910.