I do not consider Sorabji as a failed composer writing unplayable music as the short introduction above present him...
I think nothing resemble Sorabji cosmos in piano music... But Sorabji ask a lot of the listener ...We must want to be immersed in another world...
But i recommend this video above not as the last word on Sorabji but as a challenge...
Perhaps you will listening Sorabji and you will not be moved as we are moved by most classical composers...But none of the composers who moves me gave to me such challenge for my attention and anyway i found Sorabji music fascinating as really a new geometrical cosmos for piano ...My favorite instrument ...
Sorabji is one of my favorite composer in the twentieth century ...