115 Great importance is to be attached to the teaching and practice of music in seminaries, in the novitiates and houses of study of religious of both sexes, and also in other Catholic institutions and schools. To impart this instruction, teachers are to be carefully trained and put in charge of the teaching of sacred music. It is desirable also to found higher institutes of sacred music whenever this can be done. Composers and singers, especially boys, must also be given a genuine liturgical training.
Source: Sacrosanctum Concilium (Vatican.va)