The duration of a music lesson will depend on a number of factors:
Learning a musical instrument: There is no maximum time, but normally each session lasts between 1 and 2 hours.
Singing in a choir: A group or choir singing lesson can last up to 4 hours, depending on the number of people in the group and whether there is a performance.
Private singing lesson: A private singing lesson usually lasts between 45 minutes and 2 hours. Beginners should start with less time until they build up the vocal stamina to sing for longer.