Six pieces for piano tuned in a 13-limit just intonation. Contents: 6Primes 13-7-6-4; 6Primes 11-7-6-4; 6Primes 13-6-5-4; 6Primes 7-6-5-4; 6Primes 13-11-8-6 and 6Primes 11-5-4-3. With program notes, tuning system, and charts. The first six prime numbers are used to govern both the tuning and temporal structure of the music. Spiral bound, score, 64 p.