Erik Satie (1866 - 1925) French composer and pianist.
I've taken a very minimalistic approach to this performance. (transcribed note for note from the piano score by artist) No registration changes, and very sparse combinations:
Pedal: 8' Flute
Choir: 8' Flute
Solo: 8' French Horn
Swell: 8' Diapason, and String (without the celeste)
Also I disabled the blower.... with this quiet registration it began to sound like "tape hiss" on the recording.