A edição melhora a gravação.

Because both nouns are feminine singular, so they take the definite article a.

• a edição = the editing / the edition
• a gravação = the recording

In Portuguese, articles are used more often than in English. In a sentence like this, a edição melhora a gravação can sound natural even when speaking generally, not just about one specific recording.

Melhorar is the infinitive form, meaning to improve.

In the sentence, the verb is conjugated:

• melhora = improves

This is the third person singular form in the present tense, matching the subject a edição.

So:

• melhorar = to improve
• a edição melhora = the editing improves

In A edição melhora a gravação, the subject is a edição because it is the thing doing the action.

Structure:

• A edição = subject
• melhora = verb
• a gravação = direct object

So the meaning is:

• The editing improves the recording

Not:

• The recording improves the editing

Word order helps make that clear here.

It can mean both, depending on context.

Common meanings of edição:

• edition: as in a book edition or magazine issue
• editing: as in audio, video, or text editing

In this sentence, because it is affecting a gravação (the recording), edição is naturally understood as editing.

So here:

• A edição melhora a gravação = Editing improves the recording

Gravação usually means recording.

It can refer to:

• the act of recording
• the recorded result

Examples:

• A gravação foi longa. = The recording was long.
• A gravação ficou ótima. = The recording turned out great.

In your sentence, it means the recording that is improved by the editing.

Grammatical gender in Portuguese is part of the noun itself, and it does not always match biological sex or English logic.

These two nouns are feminine:

• a edição
• a gravação

A useful clue is that many nouns ending in -ção are feminine:

• a gravação
• a edição
• a informação
• a canção

So once you learn the noun’s gender, the article and other words match it.

A simple approximation:

• edição ≈ eh-jee-SOWN
• gravação ≈ gra-va-SOWN

A few pronunciation notes:

• ção is pronounced something like são with a nasal sound.
• The final -ão is nasal, not a full English ow sound.
• In Brazilian Portuguese, the d in edição often sounds like an English j before i, so edição sounds close to eh-jee-SOWN.

This is only an approximation, but it helps.

Yes.

• melhor = better
• melhorar = to improve / to make better

So melhorar literally comes from the idea of making something better.

Examples:

• Quero melhorar meu português. = I want to improve my Portuguese.
• A edição melhora a gravação. = Editing improves the recording.

Usually, in this sentence, keeping the articles sounds more natural:

• A edição melhora a gravação.

If you remove them:

• Edição melhora gravação.

that sounds more like a headline, note, label, or very compressed style, not normal everyday speech.

So for standard spoken and written Portuguese, use the articles.

Yes. Portuguese often uses the definite article where English might use no article for a general statement.

So A edição melhora a gravação can mean:

• The editing improves the recording
• or more generally, Editing improves a recording / recording quality

The exact English wording depends on context, but the Portuguese sentence is perfectly natural as a general statement.

Yes, it is natural and grammatically correct.

It sounds like a clear, neutral statement. Depending on context, Brazilians might also say things like:

• A edição melhora o áudio. = Editing improves the audio.
• A edição melhora o resultado final. = Editing improves the final result.

But your sentence itself is completely normal.

The plurals are:

• a edição → as edições
• a gravação → as gravações

Notice the changes:

• singular -ão often becomes plural -ões
• edição → edições
• gravação → gravações

So:

• As edições melhoram as gravações. = The edits / editions improve the recordings.

In Portuguese, verbs change for person and number, not for gender.

So the verb matches who/what is doing the action:

• eu melhoro
• você melhora
• ele melhora
• ela melhora
• a edição melhora

Notice that ele, ela, and a edição all use melhora because they are all third person singular.

Gender affects articles and adjectives more than verbs.