音乐会 means "concert" and refers to a live musical performance event. It is the standard term used in both casual and formal contexts when talking about attending or organizing a music event.
昨晚的音乐会太精彩了!
zuówǎn de yīnyuèhuì tài jīngcǎi le!
Last night's concert was absolutely wonderful!
我买了两张周末音乐会的票。
wǒ mǎi le liǎng zhāng zhōumò yīnyuèhuì de piào.
I bought two tickets for the weekend concert.
她下个月要在大剧院举办一场音乐会。
tā xià ge yuè yào zài dà jùyuàn jǔbàn yì chǎng yīnyuèhuì.
She is going to hold a concert at the grand theater next month.