During his time the repertoire of the choir expanded and its reputation abroad grew due to long concert tours around the globe.

The choir operates in connection with training groups named B-, Choral- and Cappellachoir, which prepare 7- to 12-year-old boys to perform in the main chorus (A-Choir).

Cantores Minores' permanent repertoire includes, inter alia, Johann Sebastian Bach's major works: St Matthew Passion and St John Passion, (which sets out in alternate years), Christmas Oratorio, and Mass in B Minor, as well as the composer's motets.

The choir's a cappella program is a cross-section of the entire history of classical choral music, ranging from Orlando di Lasso to Olli Kortekangas.

Finnish choral music is strongly represented in their repertoire, with songs from composers including Einojuhani Rautavaara, Jukka Linkola, Joonas Kokkonen and Leevi Madetoja.