balseongeul yeonseuphago daesareul dasi ilgeosseo.

Not exactly.

발성 means voice production or vocalization—how you produce your voice, project it, control breathing, resonance, and so on. It is often used in contexts like singing, acting, broadcasting, or speech training.

That is different from 발음, which means pronunciation—how individual sounds and words are pronounced.

So in this sentence, 발성을 연습하고 suggests something like practicing vocal technique, not just practicing how to pronounce words.

The -을/를 particle marks the direct object of the verb.

Here:

• 발성을 연습하고
• 대사를 다시 읽었어

Both 발성 and 대사 are things being acted on:

• you practice voice production
• you read the lines

Because 발성 ends in a consonant, it takes -을:

• 발성 + 을 = 발성을

And because 대사 ends in a vowel, it takes -를:

• 대사 + 를 = 대사를

-고 connects verbs, often like and in English.

So:

• 연습하고 대사를 다시 읽었어 means
• I practiced vocalization and read the lines again

It can also suggest that one action happened and then another followed, especially when the order is obvious from context.

So here it can feel like:

• I practiced my voice, then read the lines again

But grammatically, -고 is mainly just a connector.

No. It does not always strongly mean after that.

Usually -고 simply links actions:

• did X and did Y

Sometimes English naturally translates it as and then, but that sense often comes from the situation, not from -고 itself.

If you want to emphasize after doing X, Korean often uses forms like:

• -고 나서
• -은 후에 / -ㄴ 후에

So this sentence is fairly neutral:

• practiced vocalization and read the lines again

대사 usually means lines or dialogue, especially in a script for acting, drama, film, or performance.

So 대사를 읽었어 means:

• read the lines
• read the script lines/dialogue

It would sound very natural in an acting or performance context.

다시 means again.

In Korean, adverbs like 다시 usually come before the verb they modify. So:

• 대사를 다시 읽었어 = read the lines again

That placement is very normal in Korean.

You could think of the structure as:

• object + adverb + verb

So:

• 대사 = the lines
• 다시 = again
• 읽었어 = read

읽었어 is the casual/informal past form.

Compare:

• 읽었어 = casual, used with friends, people younger than you, or in relaxed speech
• 읽었어요 = polite, safer in most everyday situations
• 읽었습니다 = formal

So the sentence is in a casual style.

The same sentence in polite speech would be:

• 발성을 연습하고 대사를 다시 읽었어요.

Yes. 읽었어 is past tense, and in this kind of sentence the final verb usually determines the overall tense of the sentence.

So:

• 연습하고 = practice + connector
• 읽었어 = read + past casual

Together, the sentence means that these actions happened in the past:

• practiced vocalization
• read the lines again

Even though 연습하고 itself is not marked for past tense, the whole sentence is understood as past because of the final verb 읽었어.

The subject is omitted, which is very common in Korean.

Korean often leaves out subjects when they are clear from context. So this sentence could mean:

• I practiced vocalization and read the lines again
• He/She practiced vocalization and read the lines again
• We practiced vocalization and read the lines again

In many learning materials, it is often translated with I, but the Korean sentence itself does not explicitly say I.

Yes, a little.

Korean usually follows Subject-Object-Verb order, and the verb comes at the end of each clause.

This sentence breaks down like this:

• 발성을 = vocalization + object marker
• 연습하고 = practiced and
• 대사를 = lines + object marker
• 다시 = again
• 읽었어 = read

Very literally:

• [vocalization] practiced and [lines] again read

Natural English changes the order:

• I practiced vocalization and read the lines again.

It is pronounced more like 일거써.

That happens because 읽다 has the 받침 ㄺ, and its pronunciation changes depending on what follows.

So:

• 읽다 is written with ㄺ
• 읽었어 is commonly pronounced [일거써]

This is one of those forms where the spelling and pronunciation are not completely obvious to learners, so it is worth memorizing.

Because 연습하다 means to practice, and it makes the meaning more explicit.

• 발성하다 = to vocalize / to produce voice
• 발성을 연습하다 = to practice vocalization / practice voice production

In this sentence, the speaker is talking about training or rehearsal, so 발성을 연습하다 fits very well.

It sounds like a deliberate exercise, especially in acting, singing, or speaking practice.