[[Listen]]
Voices of women join in the acclaim.
[[Listen]]
The trumpets of the Egyptian troops execute a most brilliant modulation from A-flat to B-natural.
The reference here is to the long, straight trumpets with three valves (only one of which, however, is used). These trumpets, in groups of three, precede the divisions of the Egyptian troops. The trumpets of the first group are tuned in A-flat.
When the second group enters and intones the same stirring march theme in B-natural, the enharmonic modulation to a tone higher gives an immediate and vastly effective "lift" to the music and the scene.