The soprano intones the high C in a pure soft voice, allowing it to vibrate for a time, and slowly gliding down, while the alto holds the C steadily, so that at first I was under the delusion that the high C was still held by the soprano; the skill, too, with which the harmony is gradually developed is truly admirable. The other _embellimenti_ are adapted in the same way to the consecutive chords: but the first one is by far the most beautiful. I can give no opinion as to the particular mode of executing the music; but what I once read, that some particular acoustic contrivance caused the continued vibration of the sounds, is an entire fable, quite as much so as the assertion that they sing from tradition, and without any fixed time, one voice simply following the other; for I saw plainly enough the shadow of Baini's long arm moving up and down; indeed, he sometimes struck his music-desk quite audibly. There is no lack of mystery too, on the part of the singers and others: for example, they never say beforehand what particular Miserere they intend to sing, but that it will be decided at the moment, etc., etc. The key in which they sing, depends on the purity of the voices. The first day it was in B minor, the second and third in E minor, but each time they finished almost in B flat minor.
The chief soprano, Mariano, came from the mountains to Rome expressly to sing on this occasion, and it is to him I owe hearing the _embellimenti_ with their highest notes. However careful and attentive the singers may be, still the negligence and bad habits of the whole previous year have their revenge, consequently the most fearful dissonance sometimes occurs.
I must not forget to tell you that on the Thursday, when the Miserere was about to begin, I clambered up a ladder leaning against the wall, and was thus placed close to the roof of the chapel, so that I had the music, the priests, and the people far beneath me in gloom and shadow. Seated thus alone without the vicinity of any obtrusive stranger, the impression made on me was very profound. But to proceed: you must have had more than enough of Misereres in these pages, and I intend to bring you more particular details, both verbal and written.