johahaneun eumageul deureumyeon ma-eumi pyeonhaejyeoyo.

좋아하는 is the noun-modifying form of 좋아하다 (to like).

• 좋아하다 = to like
• 좋아하는 음악 = music that I like / favorite music

In Korean, verbs can directly describe nouns by changing into a modifier form. So instead of saying something like music which I like, Korean naturally says 좋아하는 음악.

Because 음악 is the object of 듣다 (to listen to).

• 음악을 듣다 = to listen to music

The particle 을/를 marks the thing receiving the action. Since the action is listening, the music is the object, so 을 is used.

들으면 comes from 듣다 (to listen) plus -으면, which often means if or when.

So 좋아하는 음악을 들으면 means:

• if I listen to music I like
• when I listen to music I like

In this sentence, it sounds more like a general truth or repeated situation: when I listen to music I like...

In Korean, -으면/면 often covers both ideas. The exact meaning depends on context.

For example:

• 비가 오면 안 가요. = If it rains, I won't go.
• 집에 가면 쉬어요. = When I get home, I rest.

In your sentence, it is not talking about a doubtful possibility. It sounds like a usual result, so when is the most natural interpretation.

Because 마음 is the subject of 편해져요.

The main clause is:

• 마음이 편해져요 = my heart/mind feels at ease / becomes calm

Here, 마음 is the thing that changes state, so it takes 이/가, not 을/를.

A helpful way to see the structure is:

• 좋아하는 음악을 들으면 = when I listen to music I like
• 마음이 편해져요 = my heart/mind becomes at ease

It can mean both, depending on context. In this sentence, 마음이 편해져요 means something like:

• I feel emotionally at ease
• my mind feels calm
• my heart feels lighter

It is broader than just the physical heart. It refers to your inner feelings or emotional state.

편해져요 comes from:

• 편하다 = to be comfortable, at ease
• 편해지다 = to become comfortable / to become at ease
• 편해져요 = polite present form of 편해지다

So the sentence is not just saying the heart is comfortable, but the heart becomes comfortable / feels relieved.

This -아/어지다 pattern is very common for expressing a change of state:

• 조용해지다 = to become quiet
• 커지다 = to become big
• 편해지다 = to become comfortable / relaxed

편해져요 ends in the polite informal style, which is very common in everyday Korean conversation.

It is polite and natural for speaking with:

• people you do not know very well
• classmates
• coworkers
• most everyday situations

The plain dictionary form would be 편해지다, but in a full sentence Korean usually needs a sentence ending, and -어요/아요 is one of the most common ones.

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

So this sentence could be understood as:

• (저는) 좋아하는 음악을 들으면 마음이 편해져요.

But saying 저는 every time would often sound unnecessary. Korean commonly omits pronouns when the meaning is already clear.

Korean often does not explicitly say my when it is obvious.

In English, you would usually say my heart or my mind, but in Korean:

• 마음이 편해져요 already naturally implies my heart/mind in this context

If needed, Korean can say 제 마음이, but it is often omitted because it is understood.

No, they are different.

• 좋아하는 음악 = music that I like
• 좋은 음악 = good music

So 좋아하는 음악 focuses on personal preference, while 좋은 음악 sounds more like music that is good in quality, nice, or admirable.

Yes, and it is very natural. But the nuance is slightly different.

• 들으면 = when/if I listen to it, then this happens
• 들을 때 = when I am listening / at the time I listen

In many cases, both are possible.
Your original sentence with 들으면 emphasizes the result a bit more: listening to music I like leads to feeling at ease.

By itself, it usually sounds like a general truth or repeated experience.

So it feels like:

• Whenever I listen to music I like, I feel at ease.

If you wanted to describe one specific past moment, Korean would usually change the tense or add more context.

It follows this pattern:

[condition/time clause] + [main clause]

• 좋아하는 음악을 들으면 = when I listen to music I like
• 마음이 편해져요 = my heart/mind becomes calm

So the full structure is:

• When I listen to music I like, I feel at ease.

This is a very common Korean sentence pattern: Verb-(으)면 + result

For example:

• 운동하면 기분이 좋아져요. = When I exercise, I feel better.
• 따뜻한 차를 마시면 몸이 편해져요. = When I drink warm tea, my body feels more comfortable.