LET'S PLAY: discover the hidden message

I have used PUZZLEMAKER to hide a message inside a puzzle. If you can find inside the puzzle the words you will see below the puzzle, you will discover the message.

You can find the solution, here:

https://www.dropbox.com/s/x6w15304unb0w3s/puzzlemaker_rock%20band%20instruments%20SOLUTION.pdf?dl=0