I'm just wondering how one would use solfège for chords/harmony. For example, to sing C major, does one say "do mi so"? If so, wouldn't that in practice mean that one would have to say a lot of words when harmonizing with another person? It's like arpeggiating the chord.
Instead of arpeggiating, is there a block chord version where the entire chord is contained in one syllable? Or when we harmonize with solfège, do all notes of the chord need to be individually pronounced?