riheoseoreseo balseonggwa dongseoneul dasi yeonseuphaesseo.

-에서 marks the place where an action happens. So 리허설에서 means at the rehearsal / during rehearsal as the setting where the practicing took place.

Compare:

• 학교에서 공부했어 = I studied at school
• 리허설에서 연습했어 = I practiced at the rehearsal

If you used -에 instead, it would sound more like a destination or location rather than the place of activity, and -에서 is the natural choice with an action like 연습하다.

These are both performance-related words.

• 발성 = vocalization, voice production, how you project or use your voice
• 동선 = movement route/blocking, the path or movement pattern on stage

So in a rehearsal context, 발성 is about the voice, and 동선 is about where and how someone moves.

This is a very common pattern in Korean when listing multiple objects.

In 발성과 동선을:

• 발성
  • 과 = 발성과 = vocalization and
• 동선
  • 을 = 동선을 = blocking/movement route as the object

Korean often puts the object marker only on the last item in a list. So the whole phrase means:

• 발성과 동선을 = vocalization and blocking as the things being practiced

You could theoretically mark both, but in natural Korean, marking only the last one is very common.

Both -과 and -와 mean and when linking nouns.

• Use -과 after a noun ending in a consonant
• Use -와 after a noun ending in a vowel

Since 발성 ends in a consonant sound (ㅇ), it becomes 발성과.

Examples:

• 책과 공책 = a book and a notebook
• 의자와 책상 = a chair and a desk

다시 means again.

So the speaker is not just saying they practiced those things, but that they practiced them again, probably as repetition, review, or correction.

Depending on context, 다시 can suggest:

• repeating something
• going over it one more time
• practicing it again because it needed improvement

연습했어 comes from 연습하다 (to practice) in the past tense casual style.

Breakdown:

• 연습하다 = to practice
• 연습했어 = practiced / practiced it

This is the informal, casual speech level, often used:

• with friends
• with people younger than you
• in diary-like narration
• in casual conversation

A more polite version would be:

• 리허설에서 발성과 동선을 다시 연습했어요.

Korean often leaves out the subject when it is obvious from context.

So 리허설에서 발성과 동선을 다시 연습했어 could mean:

• I practiced vocalization and blocking again at the rehearsal
• We practiced vocalization and blocking again at the rehearsal
• sometimes even he/she/they did, if the context already makes that clear

In natural Korean, dropping the subject is very common.

리허설 is a loanword from English rehearsal.

Korean uses many loanwords, especially in music, theater, broadcasting, and performance contexts. Even though it comes from English, it behaves like a normal Korean noun, so you can attach particles to it:

• 리허설에서
• 리허설을
• 리허설이

Yes, very naturally.

연습하다 is often used with activity nouns, especially in learning, sports, music, dance, and acting.

Examples:

• 발성을 연습하다 = practice vocalization
• 동선을 연습하다 = practice blocking
• 대사를 연습하다 = practice lines
• 춤을 연습하다 = practice dancing

So this sentence sounds very natural in a performance or rehearsal setting.

It is most natural in a performance context, such as:

• theater
• musicals
• singing
• stage performance
• acting class

That is because both 리허설 and especially 동선 strongly suggest stage or performance work.

발성 can also appear in broader contexts like voice training or speech training, but 동선 makes the sentence feel quite performance-specific.