(Music Pro Guides). Most choirs spend their rehearsal time focusing on notes, rhythms, and precision. They rarely, if ever, discuss a song's meaning and feeling, even though those elements are precisely what draws people to the music in the first place. Thousands of books have been written about choral technique, teaching people how to sing technically well. What sets The Heart of Vocal Harmony apart is its focus on honest unified expression and the process of delivering an emotionally compelling performance. It delves into an underdeveloped vocal topic the heart of the music and the process involved with expressing it. The Heart of Vocal Harmony is not just for a cappella groups it is also for vocal harmony groups, ensembles, and choirs at all levels, with or without instruments. In addition to the process, the book features discussions with some of the biggest luminaries in vocal harmony: composers, arrangers, directors, singers, and groups including Eric Whitacre, Pentatonix, the Manhattan Transfer, and more!