About this exercise
Siren Slides
A siren is a slow slide from the bottom of the voice to the top and back, on an "ng" or an "oo", with no steps and no stopping. It is the gentlest way to work the passaggio, the place where the voice shifts from chest to head, because a slide gives the muscles time to hand over instead of forcing a jump. Singers who siren daily lose the crack; singers who avoid the break keep it. The exercise is also diagnostic: the pitch where the slide wobbles or thins is your transition, and knowing it makes every song easier to plan. This exercise demonstrates a gentle slide, then guides four short turns. You report how each turn felt; an optional local recording lets you listen back. It does not measure glide smoothness or locate a register transition. Keep it quiet, keep it connected, and let it be ugly at first.
How to do it
- Pick an easy "oo" or a lip trill. Start low.
- Slide up high and back down in one smooth arc.
- Let the top get lighter and quieter. Don't hold the high note.
- Do 4 to 6 sirens. Go wider only while it stays easy.
- Stop if your throat grabs or the top needs more volume.
Sirens join your low, middle and high voice without aiming at exact notes. You also find out where your voice feels easy today.
What the app listens for
a recording, if you make one, for you to play back.
What comes next
Keep slides within an easy range. Later register lessons can help you explore changes in your voice; this preview does not measure those changes or set your range.
If singing hurts, stop. Pain, hoarseness, extra effort, lost range or constant throat clearing for more than a day? See an ENT or laryngologist, or a speech therapist who works with singers. Don’t practice harder.
What is the passaggio?
The "bridge" or "break" between registers: the pitch zone where the voice shifts from one mechanism to another. Every voice has TWO. The first sits around B3 to Eb4 for men and, contrary to how it is usually taught, in a narrow band around D4 to F4 for women rather than up at A4. The second is roughly a fourth above the first for men, and much higher for women, around D5 to F#5. Your own are what matter; the passaggio locator drill measures them.
What are registration events (passaggio)?
Transition points where the vocal mechanism shifts between registers. Most singers have two. For men the first sits around B3 to Eb4 depending on voice type, and the second a perfect fourth above it, around D4 to Ab4: NOT up at A4 to B4, which is above where most male voices have already committed to head. For women the first clusters around D4 to F4 and the second is much higher, around D5 to F#5. Smooth navigation of both is one of the most important vocal skills.
What is head voice?
The upper register where vocal folds thin and stretch, vibrating mostly at the edges. Produces lighter, floaty tone. Named for the sensation of vibration in the head. Used for higher, softer singing.