Amish don't sing at full voice during work. They hum. Quietly, under their breath. Ausbund melodies simplified, sped up — matching work rhythm.
Why
Rhythm. Mowing — hum to the swing. Planing — to the plane strokes. Milking — to the milk streams. Music syncs body with work.
Barn Raising
At a barn raising 150 men work simultaneously. Sometimes someone starts a hymn — softly. Others join. Not everyone — whoever feels like it. No one conducts. Singing rises and fades like wind.