Gladi resik dimulai setelah audisi.

Gladi resik is a fixed expression meaning a dress rehearsal or final full rehearsal before a performance, ceremony, or event.

It is more specific than just practice. It usually suggests a complete run-through under conditions that are as close as possible to the real event.

Learners should usually treat gladi resik as one set phrase, not as two separate everyday words.

Latihan means practice or training in a general sense.

Gladi resik is much more specific:

• latihan = any practice session
• gladi resik = the final rehearsal before the real event

So if someone is just practicing lines, music, or movements, latihan is more natural. If it is the last full rehearsal before the actual performance, gladi resik is the better choice.

Dimulai is built from di- + mulai and is the passive form, literally something like is started.

In this sentence, Indonesian uses dimulai to say that the dress rehearsal begins / is started after the audition. This is very natural in Indonesian, especially in formal or written style.

You may also hear mulai in everyday speech:

• Gladi resik mulai setelah audisi

That sounds more conversational.
Dimulai sounds a bit more standard, formal, or official.

Yes. Dimulai is the passive form of memulai.

Here is the basic pattern:

• mulai = to begin, to start
• memulai = to start something
• dimulai = to be started

Compare:

• Panitia memulai gladi resik setelah audisi.
  The committee starts the dress rehearsal after the audition.
• Gladi resik dimulai setelah audisi.
  The dress rehearsal is started / begins after the audition.

In the sentence you gave, the doer is not mentioned. The focus is on the event itself.

Setelah means after.

In this sentence, it introduces a time expression:

• setelah audisi = after the audition

It can be followed by:

• a noun: setelah audisi
• a longer clause: setelah audisi selesai = after the audition is finished

So the sentence is telling you when the dress rehearsal begins.

Indonesian does not use articles like the, a, or an the way English does.

So:

• gladi resik can mean the dress rehearsal or a dress rehearsal
• audisi can mean the audition or an audition

Context tells you which meaning is intended. In many real situations, speakers do not need to mark this explicitly.

If needed, Indonesian can add words for clarity, such as:

• sebuah audisi = an audition
• gladi resik itu = that/the dress rehearsal

But in your sentence, leaving them out is completely normal.

Indonesian verbs do not change form for tense the way English verbs do.

So dimulai by itself does not specifically mean starts, started, or will start. The time is usually understood from context.

If you want to be more explicit, Indonesian can add time or aspect words:

• akan dimulai = will begin
• sudah dimulai = has already begun / already started
• sedang dimulai = is being started

In your sentence, the timing is understood generally from context, with setelah audisi giving the sequence.

Yes. You can also say:

Setelah audisi, gladi resik dimulai.

This means the same thing. The difference is mainly emphasis:

• Gladi resik dimulai setelah audisi. → starts with the event
• Setelah audisi, gladi resik dimulai. → starts with the time sequence

Both are natural. The second version highlights when it happens a bit more.

Yes. Audisi is a loanword and means audition.

It is commonly used for tryouts in music, acting, dance, and similar contexts.

One useful pronunciation note for learners: in Indonesian, it is pronounced more like au-di-si, with clear syllables, not exactly like the English pronunciation of audition.

Not necessarily. Gladi resik dimulai setelah audisi is already natural.

If you say gladi resik itu, you are specifically pointing to a particular dress rehearsal that both speaker and listener already know about:

• Gladi resik itu dimulai setelah audisi.

Adding itu makes it more explicitly definite, similar to that dress rehearsal or sometimes the dress rehearsal in context. But without itu, the original sentence is still perfectly normal.