El actor con el papel secundario proyecta la voz.

They are doing two different jobs:

• El actor = the actor
• el papel secundario = the supporting role

Spanish uses the definite article very often, including before many nouns where English might also use the. Here, the second el belongs to papel and means the role.

So the structure is:

• El actor = the actor
• con el papel secundario = with the supporting role / with the secondary role

Yes, papel can mean paper, but it also means role in a play, film, or performance.

So in this sentence:

• papel secundario = supporting role

This is a very common meaning of papel when talking about actors and acting.

Because con here means something like with or having. It describes which actor we are talking about: the one who has the supporting role.

So:

• el actor con el papel secundario = the actor with the supporting role

This is a natural way in Spanish to identify someone by something associated with them.

A learner might also expect actor secundario, but that would mean supporting actor rather than actor with the supporting role. The sentence specifically uses papel.

Yes, it is a normal and correct expression.

• papel secundario = supporting role / secondary role

You may also hear related expressions such as:

• actor secundario = supporting actor
• actriz secundaria = supporting actress
• papel principal = main role / leading role

So secundario here means secondary or supporting, depending on the context.

Because the verb is proyectar.

Its stem is proyect-, so the he/she/it form in the present tense is:

• yo proyecto
• tú proyectas
• él/ella proyecta

So proyecta means he/she projects.

The spelling projecta is not correct in standard Spanish.

It means projects his voice / her voice, or more naturally in English, projects their voice.

In theatre or public speaking, proyectar la voz means speaking in a way that carries well so people can hear you clearly, without necessarily shouting.

It is a fixed and very common expression in performance contexts.

Spanish often uses the definite article (el, la, los, las) where English uses a possessive such as his, her, my, especially with body parts and things closely associated with a person.

Here, proyecta la voz is understood as he/she projects his/her voice.

Using su voz is possible, but la voz is very natural because the owner is obvious from the subject el actor.

Because there is no direct object that is a specific person.

The personal a is used before a specific human direct object, for example:

• Veo al actor = I see the actor

But in your sentence:

• El actor is the subject
• la voz is the direct object
• con el papel secundario is a descriptive phrase

So no personal a is needed.

Because of meaning and sentence structure.

The phrase comes right after El actor, so it naturally attaches to actor:

• El actor con el papel secundario = the actor with the supporting role

Then the verb comes:

• proyecta

And finally the object:

• la voz

It would make very little sense for con el papel secundario to describe voz. A voice does not have a supporting role, but an actor does.

Yes, that is possible, but it is slightly different in nuance.

• El actor con el papel secundario = the actor with the supporting role
• El actor del papel secundario = the actor of the supporting role / the actor playing the supporting role

Both can work, but del papel secundario more directly links the actor to that role as the one performing it. Con is a bit more descriptive; de sounds a bit more tightly connected to the role itself.

Because in Spanish, most adjectives normally come after the noun.

So:

• papel secundario = supporting role
• actor famoso = famous actor
• voz clara = clear voice

Putting secundario before the noun would sound unusual here and is not the normal order.

For a woman, you would normally say:

• La actriz con el papel secundario proyecta la voz.

So:

• actor = male actor, or sometimes actor in a general sense
• actriz = actress

In modern usage, some speakers may use actor more broadly in certain contexts, but actriz is still very standard in Spain for a female actor.

Yes. Proyecta is the third person singular present indicative of proyectar.

So it means:

• he projects
• she projects

Depending on context, Spanish present tense can also sometimes translate naturally into English as:

• is projecting
• does project

But the basic form here is simple present.