"You ask me to explain the difference between the coloratura and the
dramatic organ. I should say it is a difference of timbre. The
coloratura voice is bright and brilliant in its higher portion, but
becomes weaker and thinner as it descends; whereas the dramatic voice
has a thicker, richer quality all through, especially in its lower
register. The coloratura voice will sing upper C, and it will sound very
high indeed. I might sing the same tone, but it would sound like A flat,
because the tone would be of such totally different timbre.