Tire o ruído de fundo da trilha sonora.

Tire is the imperative form of the verb tirar (to remove, to take out, to take away).

In this sentence, it is giving a command or instruction:

• tirar → infinitive
• tire → remove!

In Brazilian Portuguese, tire is the command form normally used with você, which is very common in Brazil.

Because tire matches the você command style.

In Brazilian Portuguese:

• Tire = command for você
• Tira = command for tu in many varieties

Since você is extremely common in Brazil, tire is a very normal way to give an instruction.

So this sentence sounds like a standard instruction, such as something you might see in editing software, a manual, or a polite spoken command.

It sounds standard and slightly more neutral or polite than some very casual alternatives, but not overly formal.

For example:

• Tire o ruído de fundo... → neutral, standard
• Tira o ruído de fundo... → more informal in places where tu is used, or casual/instructional in some contexts

In Brazil, using você-style commands like tire is very common, even in everyday situations.

Ruído de fundo is the normal expression for background noise.

Breakdown:

• ruído = noise
• de fundo = background

So de fundo does not mean from the bottom here. It is a fixed expression meaning background.

You will also see de fundo in other expressions, such as:

• música de fundo = background music
• imagem de fundo = background image

Here, de links the noun ruído to the idea of fundo.

Portuguese often uses noun + de + noun where English might use an adjective:

• ruído de fundo = background noise
• som de guitarra = guitar sound
• copo de vidro = glass cup / cup made of glass

So de fundo works like a descriptive phrase attached to ruído.

Da is a contraction of:

• de + a = da

So:

• da trilha sonora = from the soundtrack

This happens very often in Portuguese:

• de + o = do
• de + a = da
• de + os = dos
• de + as = das

Since trilha sonora is feminine singular, it takes a, and de + a becomes da.

Because tirar often follows the pattern:

• tirar algo de algo = to remove something from something

So:

• Tire o ruído de fundo da trilha sonora = remove the background noise from the soundtrack

Other examples:

• Tire o livro da mesa = Take the book off the table
• Tire a mancha da camisa = Remove the stain from the shirt

This is a very common structure in Portuguese.

Trilha sonora literally means soundtrack.

Depending on context, it can mean:

• the soundtrack of a movie or video
• the audio track in media
• the musical/audio layer connected to some visual content

In a technical or editing context, it can refer to the audio that belongs to the video or project.

Sometimes other expressions may be used in specific technical contexts, such as:

• faixa de áudio = audio track
• áudio = audio

But trilha sonora is perfectly natural and understandable.

Because o is the definite article the.

• o ruído = the noise
• o ruído de fundo = the background noise

Ruído is a masculine singular noun, so it takes o.

Compare:

• o som = the sound
• a música = the music

Yes. Ruído is a masculine noun.

That is why the sentence uses:

• o ruído

and not a ruído.

Gender affects articles and other words that agree with the noun.

Yes, but the result may sound more written or more grammatical-textbook-like than what many Brazilians say in casual speech.

A more formal/written option would be:

• Tire-o da trilha sonora. = Remove it from the soundtrack.

Here, -o replaces o ruído de fundo.

In everyday Brazilian Portuguese, people often prefer to repeat the noun or use a different phrasing instead of clitic pronouns like this, especially in speech.

So for a learner, Tire o ruído de fundo da trilha sonora is a very safe and natural sentence to use.

Ruído has the stress on the í:

• ru-Í-do

The accent mark shows that the stressed vowel is í and helps indicate that the vowels are pronounced in separate syllables.

So it is pronounced roughly like:

• roo-EE-doo (very approximate)

Without getting too technical, the accent helps show the correct stress and pronunciation.

Yes, very much.

This sentence sounds natural in contexts like:

• audio editing
• video editing
• software instructions
• technical support
• production notes

It has the tone of a direct instruction: clear, concise, and practical.