Answer:
I am an instrument capable of making numerous sound but cannot be touched or seen.
I have 24 keys but cannot open any locks. Sometimes loud sometimes soft
I ask no questions but receive a lot of answers
I can be sweet or sour. I do not rhyme with any other word
I am not a toy though many use me for pleasure. I have a butt but I cannot poo.
What gift should you give blind people, drunks, and nerds for Christmas?