Complete Piano Music, Volume 2: Music for Piano 1-85 / Electronic Music for Piano John Cage
The most used Key signatures in this album are E, C, with major being the most reccurent mode.
Harmonic Profile Complete Piano Music, Volume 2: Music for Piano 1-85 / Electronic Music for Piano
Album has 8 different key signatures, divided as follows:
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9 songs are major (out of 13).