Weeks 1-2 · breath · silent inhale, 4-second hiss
Breathe in without a sound. Hiss out without lifting a shoulder.
The rule
pass: silent inhale · 4s steady hiss · no shoulder lift
Two channels. Up top, your shoulders — they should stay flat, not climb when you inhale. Below, your airflow — a silent dip in, then a steady plateau out for 4 seconds. The emerald target band is what a smooth hiss looks like; the grey wobble is the gasping kind that runs out before the time is up.
Hear it first
Two reference clips. A clean hiss is unsettlingly quiet at the front — “sss” sounds, but the air sounds louder than the consonant. If you can hear yourself breathing in, you’re using too much pressure.
What’s happening. When you sing, the diaphragm drops on the inhale and the abdominal wall paces the exhale — slow and even is what keeps a tone steady. The hiss is a diagnostic: the upper airway is partially closed, so the only way to keep airflow constant for 4 seconds is to control pressure at the source. If you wobble, your support wobbled.
Why the shoulders matter.A shoulder lift is the body cheating — pulling air in with the upper chest because the diaphragm wasn’t doing the work. It looks like a bigger breath but it isn’t, and it puts tension at the larynx exactly where tone production needs it loose. The test is whether you can take a usable breath without that compensation.
Why this is the foundation.Every sustained tone, every long phrase, every dynamic swell — all of them assume controlled, silent inhalation and steady exhalation. SOVT sustains, vibrato, and breath-grouping for phrasing: they all collapse if you can’t hold a hiss for this long. Get this steady here, build everything else on top.
How it works
- 2-second calibration: stay quiet so we can learn your room’s noise floor.
- 5 trials. Each: silent inhale (2.5 s), then a continuous /sss/ until 4 seconds register in band.
- Scored by spectral signature (works across mics) and coefficient of variation (mic-gain invariant).