To fully appreciate the Hear and Singharmony(tm) recording technique, you must open the volume controls on your computer and shift the balance back and forth between the right and left hand channels. With the balance shifted entirely over to the right, you will hear just (or mainly) the one harmony part that the particular track you are listening to has been designed to teach.
Copyright obligations prevent us from providing complete choruses, but these samples will give you an indication of the quality of the product being offered for sale.
Samples from Vivaldi's Gloria (mp3 format):