To proceed with my little history of textless singing based on VSL-Vocal Samples, here comes Debussy's "Trois Nocturnes" (1900). The last Movement is obviously the ultimative Score for good speechless choirsamples like those made by VSL.
See here: http://klassik-resampled.de/debussy
I hope you like it. Any constructive feedback is always wellcome.
best
fahl5