I have begun creating an application that will later require intricate audio processing.

The sort of functions I am looking for are as follows:

- To be able to load WAV files.
- To be able to start a sound and stop a sound before the end of the sample.
- To be able to change the pitch of a sound.
- To be able to apply EQ effects to a sound.

I am working within QT and would like to keep it within the QT libraries. So which libraries would I be able to use?