MUSIC PRODUCTION

I not only need a music studio, but I also need someone to maniuplate a music editing program so that I can speed up, slow down, insert rubato, make corrections, and change keys.  I have MIDI files and use Music Creator which is a Sonar product.  My piano track needs editing before I sing on top of it.  And then, afterwards, my voice needs editing for pitch and breath, and congruency with the piano.  I'm not a professional singer but a serious student of song.