What does pipes and whistles in his sound mean to shakespeare?

Answer 1

I presume you are alluding to this passage from Jaques' famous Seven Ages of Man speech:

His big manly voice,

Turning again toward childish treble, pipes

And whistles in his sound.

What he's saying is that this old man's voice is becoming high-pitched and reedy, like a child's voice (hence "childish treble"). Whistles and pipes (this means instruments like penny whistles) have this kind of high-pitched tone.

Answer 2

Oh, dude, pipes and whistles in Shakespeare's works are basically just fancy ways of saying music and sounds. It's like when you hear a sweet tune or some cool noises in the background of a play, that's what he's talking about. So, like, next time you hear pipes and whistles in a Shakespeare play, just think of it as his way of setting the mood with some sick beats.