I'm still getting thrown errors, such as "variable or field 'play' declared void"
Post the EXACT error message.There is likely still something wring with where you installed the libraries. A link to where you got them from would be helpful, too.
I have older versions of the libraries involved. I pasted your (improperly posted) code in the IDE, and got several errors related to using older versions of the libraries (pre 1.0 versions).
Once I modified all the libraries to play with 1.0.3, the code you posted compiled.