The Celstes on the Swell of the Mt. Carmel organ set the standard for beauty in my mind. They are perfect for the WIdor Adagio.
This uses both the Swell Salicional/Voix Celeste and The Flauto Dolce/Flute Celeste. Pedal solo is both Great and Choit Concert FLutes coupled to Pedal at 4'
Recorded with a touch of reverb from my EMU 1616 sound card.