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Unit 3 · The four parts

The bass

Sing the bass, the floor of the chord, in roots and fifths, easy and full with your chin level, never pushed down for depth, under the other three. Free.

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More in The four parts

What it teaches

The hole: the quartet without your part, then with it. The bass is the floor: roots and fifths. Don't push down for depth; keep your chin level.

Roots. Do, then up three half steps, then so

Easy and full. Never pushed down

Chin level. No tucking for a low note

What you sing

  1. Your part with the guide, at your own pace: "Down by the old mill stream".
  2. Now your part with the other three. Headphones on.

Singing safely

Sing straight, not squeezed, at a medium-soft volume. Wear headphones: ringing needs them. Stop if anything tightens or hurts, and rest when hoarse.

Free tools by Stackapella

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Stackapella teaches you to sing harmony one part at a time, right in your browser.

Stackapella recording the alto part of Amazing Grace: each note is a bar with its name, and the one being sung says A little low, go up. Stackapella recording the alto part of Amazing Grace: each note is a bar with its name, and the one being sung says A little low, go up. Stackapella recording the alto part of Amazing Grace: each note is a bar with its name, and the one being sung says A little low, go up. Stackapella recording the alto part of Amazing Grace: each note is a bar with its name, and the one being sung says A little low, go up.
  • A guide sings your partHear your line over the others, slow it down, then take your turn.
  • Your notes light upEach note shows where you landed, and a hint when to go up or down.
  • Record every part yourselfStack your takes in time until you're the whole choir.
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