Canto Ostinato for two pianos, 3 CD
Canto Ostinato XXL, one version >4 hours!
Canto Ostinato XL, 9 different versions
Canto Ostinato on four pianos > 20.000 sold!
Canto Ostinato on two pianos
Canto Ostinato on two synthesizers
Canto Ostinato, Solodevildance I, II, III, IV, Aedem Sed Aliter, Aforisme II, one piano 
Canto Ostinato on three pianos and organ