Imagine how much more productive and efficient your rehearsals will be when you or all of your choir members have had time to rehearse on their own with a CD targeted to their specific vocal part. When you all get together there will be more time to devote to nuances and performance skills, instead of the basic learning of notes.Rehearsal CD has the featured vocal of your choice: Soprano, Alto, Tenor or Bass on the right side (or right speaker/headphone), and the rest of the chorus voices in the left speaker/headphone. That's right, you aren't alone, the rest of the chorus is there with you but your vocal part is highlighted and isolated for your convenience! The large-type, easy-to-read music book that accompanies each rehearsal CD, gives added reinforcement. For each carol you will hear the name of the carol, a set of tones, with the loudest tone being your starting tone, and a metronome click to start off the tempo and count you down to the beginning. The count will always be a full 2 measures before the start of the carol, and if the carol starts in mid-measure there will be 2 full measures plus the partial measure before the carol begins. It's as easy as that! If you listen on headphones and don't have a BALANCE control, you can simply move the left or right headphone to isolate the left/right playback sound.