Memorizzo il repertorio prima di questa audizione.

In Italian, the subject pronoun is often omitted because the verb ending already shows who the subject is.

• memorizzo = I memorize / I am memorizing

The -o ending tells you the subject is io (I), so Io memorizzo is possible, but usually unnecessary unless you want emphasis or contrast.

For example:

• Io memorizzo il repertorio, non tu. = I’m memorizing the repertoire, not you.

In a neutral sentence, Memorizzo il repertorio... is completely natural.

Both are possible, but they are used a little differently.

• Memorizzo il repertorio = I memorize / I’m memorizing the repertoire
• Sto memorizzando il repertorio = I am in the process of memorizing the repertoire right now

Italian often uses the simple present where English might prefer the present continuous. So memorizzo can sound perfectly natural even if English would say I’m memorizing.

Use sto memorizzando when you want to stress that the action is happening right now or is actively in progress.

Memorizzo comes from memorizzare, which means to memorize, to commit to memory, or to learn by heart.

It is very close in meaning to:

• imparare a memoria = to learn by heart
• mandare a memoria = to commit to memory (a bit more formal/literary)

So:

• Memorizzo il repertorio = I memorize the repertoire
• Imparo a memoria il repertorio = also possible, with a very similar meaning

Memorizzare is a straightforward and common verb, especially in modern Italian.

In Italian, definite articles are used more often than in English. Here, il repertorio refers to a specific body of material, so the article sounds natural.

• il repertorio = the repertoire

Saying just repertorio here would sound incomplete or unnatural in standard Italian.

Italian commonly uses the article with direct objects when talking about something specific or understood from context:

• Studio il brano. = I study the piece.
• Ripasso la parte. = I review the part.
• Memorizzo il repertorio. = I memorize the repertoire.

Repertorio usually means repertoire: the set of pieces, songs, roles, material, or works that someone performs or knows.

In a performance context, it could mean things like:

• songs
• musical pieces
• scenes
• monologues
• roles

So in this sentence, il repertorio means the material the speaker needs for the audition.

Prima di means before when followed by a noun.

• prima di questa audizione = before this audition

This is a very common pattern:

• prima di cena = before dinner
• prima della lezione = before the lesson
• prima di questa prova = before this rehearsal/test

Be careful not to confuse this with prima di + infinitive, which means before doing something:

• prima di uscire = before going out
• prima di cantare = before singing

So:

• prima di questa audizione → before + noun phrase
• prima di fare l’audizione → before doing the audition

Because audizione is a feminine singular noun, the demonstrative must agree with it.

• masculine singular: questo
• feminine singular: questa
• masculine plural: questi
• feminine plural: queste

So:

• questa audizione = correct
• questo audizione = incorrect

Other examples:

• questo provino = this audition / this tryout
• questa prova = this rehearsal/test

Yes, audizione can mean audition, especially in artistic or musical contexts. However, depending on the situation, Italians may also use:

• provino = very common for audition, screen test, or tryout
• casting = borrowed from English, very common in entertainment contexts

So all of these may appear, but they are not always identical in tone:

• audizione = often a bit more formal or neutral
• provino = very common, everyday entertainment/performance word
• casting = common for selections in film, TV, theater, etc.

In many contexts, questa audizione is perfectly natural.

Yes. Italian word order is flexible, and the meaning stays basically the same.

For example:

• Memorizzo il repertorio prima di questa audizione.
• Prima di questa audizione, memorizzo il repertorio.

The first version is neutral and straightforward.
The second version puts more focus on the time expression before this audition.

Italian often moves time expressions for emphasis or style.

Yes. The Italian present tense is quite flexible.

Memorizzo il repertorio prima di questa audizione could be understood as:

• a current action: I’m memorizing the repertoire before this audition
• a planned/near-future action: I’ll memorize the repertoire before this audition
• in some contexts, even a habitual pattern: I memorize the repertoire before this kind of audition

Usually, context tells you which meaning is intended. This is one reason the Italian present tense can feel broader than the English present.

Yes, but the nuance changes slightly.

• prima di questa audizione = before this audition
• prima dell’audizione = before the audition

questa audizione points to a specific audition, almost as if you are indicating it directly: this one.

dell’audizione is also specific, but it sounds a little less pointed and more like the audition already known from context.

So both are possible, but questa audizione is more explicitly demonstrative.

It is grammatical and understandable. A native speaker might say it exactly this way, but depending on context, some alternatives may sound more idiomatic:

• Memorizzo il repertorio prima dell’audizione.
• Sto memorizzando il repertorio per questa audizione.
• Imparo il repertorio a memoria prima del provino.

The best choice depends on what you want to emphasize:

• prima di questa audizione = emphasis on the time before this specific audition
• per questa audizione = emphasis on purpose, for this audition
• sto memorizzando = emphasis on the ongoing process

So the original sentence is fine, but there are several natural variations.