Possible Clues:

• Fall in the pitch, by the sound of it
• A bit of music for mad dance in church
• 'Sound off - one, two ...,' e.g.
• Fall of pitch
• The rotter starts it, by the sound of it
• Rhythmical series
• Intonation of start of chant excellent; in middle, end, awful
• One can cede that it's sound
• Rhythm of the voice
• Dance cavorting in this French rhythm