Yes, the project won't compile.

I have my directory like this:

C:\Qt\Qt5.0.2\5.0.2\msvc2010\include\QtMultimedia

In there I have all the header files that I need, QAudioInput, QAudioFormat, etc..

And in :
C:\Qt\Qt5.0.2\5.0.2\msvc2010\lib

I have the installed libraries of the whole framework.