In "ol time" country (I do not beleive this threads winds through the Alpine regions)
A missing elemental piece of this thread's pi.
Obviously, take the last open vowel sylabol of the chorus and repeat with rear-undulation of the tongue against the upper rear molars....moving into falsetto and back.
A - E - I - O - U
Like the circle of fifths/fourths...wherever you begin.... you roll around back to the start.