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“Oo” siren (octave)

Smooth glissando up and down on “oo”. Connects the bottom and top of the voice.

One repetition of the pattern. In the app it is transposed to your vocal range and scored note by note.

An octave siren on a pure 'oo': a smooth slide from the root up twelve semitones, then back down, two beats each way. Unlike a scale, there are no individual notes to hit, only a continuous curve, which is why the pitch tolerance is a forgiving 120 cents. The rounded 'oo' vowel keeps the sound narrow and light, so the voice can travel through its middle without grabbing. Four passes, rising a whole step each time.

How to do it

  1. Hear the piano sweep up and down; it's one motion, not two notes.
  2. Round your lips for 'oo' and start on the root at a comfortable, quiet volume.
  3. Slide up steadily, stay a moment at the top, and slide back without any bump.
  4. Watch the piano roll for a clean arch; gaps mean you stopped or went silent.

Coach's tip: Don't stop on any note. Even if the voice “cracks” at the break, keep going.

What to watch out for

The main problem is a jump or crack around the middle of the range instead of a slide. Sing softer through that spot, not louder. Rushing the top is common too, so let the full two beats pass. If the 'oo' spreads into 'ah' you'll lose the light quality; keep the lips rounded. Stop immediately if the throat pinches; take the range down a few semitones and return.

Who it's for

For beginners it's an early lesson in connecting low and high notes; for stronger singers it's a daily check of how smooth the voice is. Use it as the second or third exercise of a warm-up, after Lip trill – siren. Later, “Ng” siren (fifth) narrows the focus. It's listed in 5-minute warm-up and Path: Powerful pop (mix & belt).

Part of programs: 5-minute warm-up · Path: Powerful pop (mix & belt)

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