Con música suave, el ambiente se vuelve más tranquilo.

Con means with. Here it introduces the condition or circumstance: with soft music.

So:

• Con música suave = With soft music

It sets the scene for what happens next. In natural English, you might also translate the idea as When there is soft music... or With soft music playing...

In Spanish, adjectives usually come after the noun, so música suave is the normal order.

• música = music
• suave = soft, gentle

So música suave is the standard way to say soft music.

You may sometimes see adjectives before the noun in Spanish, but that often adds a stylistic or emotional effect. For everyday description, noun + adjective is the usual pattern.

Here suave means soft, gentle, or quiet/smooth depending on context.

With música, it usually suggests music that is:

• not loud
• relaxing
• gentle on the ears

So música suave can be understood as soft music or gentle music.

That’s right: nouns ending in -e can be masculine or feminine, and you usually have to learn the gender with the word.

Ambiente is masculine, so it takes:

• el ambiente
• un ambiente
• tranquilo (not tranquila)

This is a good word to memorise as a full chunk: el ambiente.

Ambiente means atmosphere, mood, or environment, depending on context.

In this sentence, el ambiente most naturally means:

• the atmosphere
• the mood

So the idea is that soft music makes the place or situation feel calmer.

In this sentence, volverse is a pronominal verb meaning to become.

So:

• volverse = to become
• se vuelve = it becomes

The se is part of the verb here; it is not a separate reflexive idea like himself/herself. You should learn it as a whole expression:

• volverse + adjective = to become + adjective

Examples:

• Se vuelve difícil. = It becomes difficult.
• El ambiente se vuelve más tranquilo. = The atmosphere becomes calmer.

Often, yes, but not in every context.

Volver by itself usually means to return or to turn:

• Vuelvo mañana. = I’m coming back tomorrow.

But volverse often means to become:

• Se volvió famoso. = He became famous.

So in this sentence, don’t read it as returns. Here it clearly means becomes.

Because the sentence is describing a change: the atmosphere becomes calmer.

• ser = to be (general identity/characteristics)
• estar = to be (state/location)
• volverse = to become / to turn into

So:

• El ambiente es tranquilo = The atmosphere is calm
• El ambiente está tranquilo = The atmosphere is calm right now
• El ambiente se vuelve más tranquilo = The atmosphere becomes calmer

Here the idea is the transition, not just the state.

Más tranquilo means more calm, calmer, or more peaceful.

It is the comparative form:

• tranquilo = calm, quiet, peaceful
• más tranquilo = calmer / more calm

In natural English, calmer is usually the best translation here.

Because tranquilo describes el ambiente, and ambiente is masculine singular.

So the adjective has to agree with the noun:

• el ambiente tranquilo
• un ambiente tranquilo

If the noun were feminine, the adjective would change:

• la sala tranquila

This is normal adjective agreement in Spanish.

Spanish often uses más + adjective even when the comparison is only implied.

So más tranquilo means that the atmosphere becomes calmer than before or than it otherwise was.

It doesn’t need to state both sides of the comparison explicitly. English works similarly:

• The room becomes quieter.
• The atmosphere becomes calmer.

The earlier state is understood.

It is acceptable, but not always strictly necessary.

• Con música suave, el ambiente se vuelve más tranquilo.
• Con música suave el ambiente se vuelve más tranquilo.

Both are possible.

The comma helps mark Con música suave as an introductory phrase and creates a small pause. In writing, this can make the sentence easier to read. In short, it is more about style and clarity than grammar.

Yes. That is also correct, but the structure is different.

• Con música suave, el ambiente se vuelve más tranquilo.
  • literally: With soft music, the atmosphere becomes calmer
• La música suave hace que el ambiente sea más tranquilo.
  • literally: Soft music makes the atmosphere calmer

The original sentence sounds a bit more descriptive and natural in many contexts. Your alternative is also grammatical and clear.

Yes. Ambiente can refer to:

• the atmosphere of a place
• the mood in a situation
• the general feel of an environment

So depending on context, it could mean:

• the mood in a room
• the atmosphere in a restaurant
• the overall feel of a space

In this sentence, it most likely means the general atmosphere or mood created by the soft music.

A few natural English versions are:

• With soft music, the atmosphere becomes calmer.
• Soft music makes the atmosphere calmer.
• Soft music creates a calmer atmosphere.
• With soft music, the mood feels more relaxed.

The Spanish sentence is straightforward, but in English we often choose the most natural wording for the context rather than translating word for word.