@JeremyECrawford does a bard's spellcasting require an actual instrument or would a kenku's mimicry of an instrument work?

— The Only Hawkman (@theonlyhawkman) January 13, 2017

See "Components" (PH, 203) for what a spellcaster needs to cast a spell. See your class for whether it has a spellcasting focus. #DnD https://t.co/fKvxfe64Bj

— Jeremy Crawford (@JeremyECrawford) January 14, 2017