Ivan Wyschnegradsky:

24 Preludes, for two pianos in quarter-tones (excerpts)
Étude sur le carré magique sonore (solo piano)
Cosmos, for four pianos in quarter-tones

INTERMISSION

Étude sur les mouvements rotatoires, for two pianos in quarter-tones
Three Pieces, op. 38 (solo piano)
Ainsi parlait Zarathustra, for four pianos in quarter-tones