(Vocal Collection). This all-in-one package includes the original Arias for Mezzo-Soprano book from the G. Schirmer Opera Anthology along with two accompaniment CDs AND the corresponding Diction Coach book/two CD set. Diction Coach includes recorded diction lessons, IPA, and word for word translations. In addition to piano accompaniments playable on both your CD player and computer, the enhanced accompaniment CDs also include tempo adjustment software for CD-ROM computer use.