Chilla_katna
In Hindustani classical music, Chilla or Chilla Katna (Doing the Chilla) is a stage of training or ritual where the student is fully isolated from the outside world and lives for music only. Some musicians spend long periods of their training in varying degrees of isolation and describe these as their chilla; for others, it's a shorter, more extreme retreat, traditionally lasting 40 days. In either form, it is thought to have the power of transforming not only the student's music, but their whole life. Chilla is widely used in the Punjab gharānā (school) of tabla playing.