What is the literal sense of the German voice classification system used to identify voice types?
Fach The German Fach system (] ; literally "compartment" or "subject of study", here in the sense of "vocal specialization") is a method of classifying singers, primarily opera singers, according to the range, weight, and color of their voices. It is used worldwide, but primarily in Europe, especially in German-speaking countries and by repertory opera houses.
Treble voice A treble voice is a voice which takes the treble part. In the absence of a separate descant part, this is normally the highest-pitched part, and otherwise the second highest. The term is most often used today within the context of choral music in reference to youthful singers. The American Choral Directors Association defines a treble as "a singer, both male and female, ages eight to sixteen".