An Audio Course in the Eight Tones of the Russian Orthodox Church. Presented by the St. Alexander Nevsky Church Ensemble, and based on the instruction system used at Holy Trinity Seminary, Jordanville, NY, these CDs “walk you through” the melody line of the tones, one musical phrase at a time. Entirely audio-based with quizzes and a 30-minute refresher course of four-part choral examples. On 10 CDs, approx. 9.5 hours.