Ventriloquism

So, then, does a dummy always says
what ventriloquist want him to say?
Does a dummy also have something to say?

Does a dummy correspond to the the ventriloquist
who seems mute, as much as ventriloquist does
to the dummy's jabbering mouth?

Why ventriloquism is so checkered
but two abreast people are not?

Who is the ventriloquist, who is the dummy,
where is the audience?