YOUR OFFLINE PRACTICE SPACE
Build a voice you can use every day.
Pick up where you left off, warm up with a short phrase, or measure a fresh recording. Everything stays on this device.
COURSE PROGRESS
Three stages, one steady routine
TODAY'S PROMPT
Start with a comfortable note
Use Voice Tools to watch your pitch settle before you move into a lesson.
RECENT CHECK-INS
Your latest measurements
No saved analyses yet. Your first check-in will appear here.
COURSE LIBRARY
Lessons
Work through guided exercises, listen to the reference phrases, then record a quick check when you are ready.
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CURRENT EXERCISE
L'S VOICE TRAINING GUIDE
Learn the sound, then practice the skill.
A native reader for the four-level guide, with the original demonstrations kept offline and a contents rail that stays with you as you study.
Personal offline reference
Audio and video stay on this device
Audio and video stay on this device
VOICE CHECK-IN
Analyse
Compare a short reading with spontaneous speech across pitch, resonance, brightness, voice quality, and recording evidence.
Voice analysis stays on this device. Use localhost when your browser blocks microphone access from a local file.
COMPARE
Guided comparison
Reading and speaking, with a side-by-side acoustic profile.
RECORD
Quick recording
Record one passage for a complete four-dimension profile.
IMPORT
Quick file check
Import WAV, MP3, or M4A audio up to 30 seconds.
Analysis settings
The detector supplies F0. The same recording is also measured for F1/F2, brightness, harmonicity, level, and clipping.
Practice feedback only. Results depend on the microphone and room; they do not identify gender or provide a clinical assessment.
SAVED CHECK-INS
History
Review measurements and recordings stored in this browser.
ACOUSTIC WORKSPACE
Voice Tools
Inspect one synchronized time window while you practise live or examine an audio clip.
Visible acoustic layers
Awaiting a signalEnable the microphone or inspect an audio file.
Use Left and Right arrows to move the cursor. Hold Shift to extend a selection. Home and End move to the visible boundaries.
LIVE READOUT
Fundamental frequency
LEVEL-- dBFS
waitingF0--Resonance / size--F1--F2--Confidence--Register--Brightness--Quality--
REAL-TIME GUIDANCE
Voice quality coach
Waiting for signal
Start with an easy “ee” or “ah”
Use a comfortable pitch and volume for about one second. The first goal is ease, not a particular sound.
- 1Easy sound
- 2Explore one quality
- 3Repeat with ease
- 4Use it in speech
Resonance / sizeHow to explore resonanceTracksA direction from F2 and spectral brightness: higher often means a smaller, brighter vowel shape. It does not measure larynx position.TryAt one easy pitch, alternate “la-ah” and “la-ee” slowly. Keep volume steady and hold each vowel for a second so the lane can respond.Listen forA clearer, smaller-sounding contrast that still leaves the jaw, tongue, and neck easy.AvoidDo not lift or hold the larynx. More brightness is not automatically better; stop if the sound feels tight.--
Building evidenceVocal lightnessHow to explore vocal lightnessTracksA spectral-tilt proxy for vocal weight. It cannot directly measure vocal-fold thickness or closure.TryStart a soft “la” on a slightly higher easy note, then glide to your current pitch while keeping the sound connected.Listen forA lighter sound that stays clear and continuous instead of airy, disconnected, or pinched.AvoidDo not create lightness by whispering, forcing falsetto, squeezing, or increasing volume.--
Building evidenceClarityHow to improve clarityTracksRecent harmonic organization plus a cepstral prominence proxy. Breathiness and roughness can lower it, but microphone distance, noise, and the room also matter.TryUse a soft “wa” or “mum” onset at conversational volume. Reduce escaping air while keeping the jaw and throat easy.Listen forA clean, connected onset without a hard click, hiss, or rough edge. Fix the recording signal first if it is noisy.AvoidClarity should not feel pressed. Stop and reset if the sound becomes tight, scratchy, or uncomfortable.--
Building evidenceStabilityHow to improve vowel stabilityTracksShort-term F0 steadiness during a held vowel. It is not a goal for natural speech.TryHold one comfortable vowel for one or two seconds. Let pitch settle before making one small resonance change.Listen forA smooth, easy sound without jumps, tremor from effort, or a rigid jaw.AvoidDo not lock the throat to flatten the trace. Once it is repeatable, move into phrase mode.--
Building evidenceDirectional coaching uses recent, device-relative acoustics. It does not infer identity or diagnose voice health.
--ROLLING 10-SECOND PROFILE
Enable the microphone and speak naturally to build the four-dimension score.Alignment and evidence update independently as usable frames accumulate.