Por favor, baja la música; quiero estudiar en silencio.

Baja is the informal singular command form of bajar for tú.

• bajar = to lower / to turn down
• baja = turn down

So baja la música means turn down the music when speaking to one person you address as tú.

Compare:

• Tú bajas la música. = You turn down the music.
• Baja la música. = Turn down the music.

Spanish commands often look different from normal present-tense forms.

The basic meaning of bajar is to lower or to bring down. With things like music, volume, heating, prices, etc., Spanish often uses bajar where English uses turn down or lower.

So:

• bajar la música = turn down the music
• bajar el volumen = lower the volume

Both are natural, but baja la música is very common in everyday speech.

Spanish often uses the definite article (el, la, los, las) where English might not, especially when referring to something specific or understood from context.

Here la música means the music—the music that is currently playing.

If you said just música, it would sound incomplete in this sentence. The article helps make it sound natural and specific.

Yes, por favor makes the request more polite, but the sentence is still informal because it uses the tú command baja.

So the tone is something like:

• polite, but familiar
• appropriate with a friend, sibling, classmate, flatmate, etc.

If you wanted to be formal, you would say:

• Por favor, baje la música.

In Spain, that would be used with someone you address as usted.

The sentence uses the informal singular command. Here are the main alternatives:

• tú: Baja la música.
• usted: Baje la música.
• vosotros (Spain, informal plural): Bajad la música.
• ustedes: Bajen la música.

So in Spain, if you were talking to several friends, you would normally say:

• Por favor, bajad la música; quiero estudiar en silencio.

After querer when you mean to want to do something, Spanish uses an infinitive.

So:

• quiero estudiar = I want to study
• quiero comer = I want to eat
• quiero dormir = I want to sleep

You do not use another conjugated verb after quiero in this structure.

So quiero estudio is incorrect because estudio is a conjugated form, not an infinitive.

Spanish often leaves out subject pronouns because the verb ending already shows who the subject is.

• quiero already means I want
• so yo quiero and quiero both mean I want

Including yo is possible, but it is usually only added for emphasis, contrast, or clarity.

Here, quiero estudiar en silencio sounds natural without yo.

En silencio is a very common Spanish expression meaning in silence or quietly.

Spanish often prefers this phrase instead of an adverb in situations like this.

• Quiero estudiar en silencio. = I want to study in silence.

You might think of silenciosamente, but that is much less common here and sounds more literary or unnatural in everyday speech.

So en silencio is the normal choice.

The semicolon links two closely related ideas:

• Por favor, baja la música
• quiero estudiar en silencio

It shows that the second part explains the reason for the first. In English, you might also use a period, comma, or because.

For example, these are all possible:

• Por favor, baja la música; quiero estudiar en silencio.
• Por favor, baja la música. Quiero estudiar en silencio.
• Por favor, baja la música, que quiero estudiar en silencio.
• Por favor, baja la música porque quiero estudiar en silencio.

The semicolon version is correct and quite clear in writing.

Música is pronounced roughly MOO-see-ka, with the stress on the first syllable:

• MÚ-si-ca

The written accent mark shows where the stress goes. Without the accent, Spanish stress rules would suggest a different pronunciation.

So the accent is there to show the correct stress pattern.

Yes, but the meaning changes slightly.

• en silencio = in silence / without noise
• en paz = in peace

If your main complaint is the noise, en silencio is more exact.
If you want to express that you want to be left undisturbed more generally, en paz can work too.

So in this sentence, en silencio is the better match because it directly connects to turning down the music.