You just need to be more clever ---
Use pictures of notes, musical instruments, etc.
A quick search on google images of comic music should give you ideas.
This is a great way to go about that creation of a comic visually depicting music in a visual only medium.
Can you produce the ACTUAL music in question? There's no reason why you can't upload the accompanying music online in MP3 format (that is if you own the copyrights to the music) and let the reader listen to the music while reading the text.
On the other hand, if you are planning on using copyrighted material from third parties you still won't be able to quote large sums of lyrics even into the text of your book if you plan on selling the finished product. You will still need to get legal permission from the copyright owners to do that.