WHOLE CHARACTER
乐
happy; glad; cheerful; fun; delight; willing; glad to do something; amusing; funny
乐 has two everyday lives: lè 'happy' (快乐, 乐趣) and yuè 'music' (音乐, 乐器).
Taught as one written unit. ZDIC: 原为象形 — the old form 樂 pictured a music stand. The simplified shape carries both lè 'happy' and yuè 'music', so no single modern split is taught.