if i want to describe a man 's voice is beautiful ,which word is suitable?and describe a song?

Question

Answer

i have a sweet, amazing, powerful voice.  thanks! :P

Answer

A man's voice cannot be sweet and beautiful. It's used for female.
He has a powerful voice. His voice is warm and comforting.

Answer

You would not describe a man's voice as sweet, as this is used for female singers. You can say:

“ He has an absolutely amazing voice”

“ He has a rich, awesome or  powerful voice "

A song can be described as:  a ballad, folk song, romantic, charming, exciting, calm, powerful, pumped, rocking, quiet, loud, etc.

Answer

you can say
you have a sweet voice.
you sing beautifully.
you sing in a beautiful way
nice song
sometimes i say a beautiful/ wonderful song