음악회가 · 음악회를
concert (especially classical), recital
Example
주말에 친구와 함께 음악회에 갔어요.
I went to a concert with a friend on the weekend.
Word parts
음 sound+악 music+회 gathering
음악 'music' + -회 'gathering, event': 전시회, 발표회.
Good to know
Pronounced [으마쾨]; for pop shows, people usually say 콘서트.