InSpectro

A mirror for your voice

An app that shows your voice turning into color on screen, with interactive games that help you free your voice, see your progress, and cultivate your sonic richness.

No downloads. Opens in your phone or computer browser. Simple.

Watch it move

InSpectro in action

If the video doesn't load, watch it on YouTube.

What InSpectro does

A companion for your musical development

🌈

Your voice becomes color

Your voice turns into color in real time. Lows at the bottom, highs at the top, and the stronger the harmonic, the warmer the color.

  • Live spectrogram
  • Adjustable color palettes and frequency range
  • Noise gate for any environment
🎯

The overtone score

A precision engine measures how many overtones you reveal and gives you the number instantly. It's the Challenge, the score only InSpectro has.

  • Polyphonic Challenge with precise feedback
  • Three visualization styles
  • History and your best results
🎼

Vocal training that feels like play

Pitch and warm-up exercises with instant feedback, in game form. You improve without feeling judged.

  • Note, scale, arpeggio and interval exercises
  • Voice warm-up and breathing
  • A 0 to 100 score, just for you to track
🎹

A continuous base to sing along

A sound field to lean on and tune over, with the keyboard always at hand.

  • Synthesizer with continuous drone
  • Choose note and octave, piano ruler
  • Hear your own voice with reverb and delay
💾

Record your voice with effects

Record sound and image together, with Reverb and Delay on your voice and the spectrum in motion, to track your progress.

  • Audio and video recording with the spectrum
  • Reverb and Delay on your voice
  • Camera capture and sharing
🌍

Right in the browser

Opens in your phone or computer browser, instantly, with nothing to install.

  • Available in several languages
  • Works with your device's own microphone
  • Installs as an app if you want

More than a spectrogram

A voice studio in your pocket

The only one to unite the spectrogram with vocal training exercises and challenges, synthesizers to create backing drones, recording with effects, and a precision engine that gives feedback instantly.

Exercises, games and challenges

Pitch training and vocal warm-up with instant feedback, in game form. The joy of experimenting and playing with your own voice, with no pressure.

Synthesizer and continuous backing

Interactive keyboard and continuous drones to create a backing and tune over it, on any note you want.

Vocal effects

Reverb and Delay to give body and space to your voice. With headphones, you hear yourself live while you practice or record with quality.

Synced recording

With one click, create interactive videos with or without camera, capturing your ideas and sharing them with friends.

Plans and access

Choose your path

You start for free and choose access whenever you want. Two tracks: use the app on your own, or learn the method in the live lessons.

Just the app, at your own pace
7 days
The full PRO app for one week.
U$4.90
€4.50
Get access
⭐ most popular
Monthly
Subscription, cancel anytime.
U$5.40/mo
€4.90
Subscribe
Annual
A full year, at a discount.
U$50.90
€44.90
Buy
Lifetime
Buy once. Yours forever, with every new training included.
U$99.90
€88.90
Buy
🎓 App + lessons with Gui: learn the Polyphonic method
1 LAB session
Live 2h via Zoom + 5 days of PRO app.
U$18.90
€16.90
Join
2 LAB sessions
Two live sessions + 30 days of app.
U$30.90
€26.90
Join
⭐ recorded
Polyphonic Tutorial
The complete recorded course, 6 lessons, at your own pace + 30 days of PRO app.
U$28.90
€25.90
I want the Tutorial
⭐ full journey
Semester
Six months of live sessions + PRO app for the whole semester.
U$88.90
€77.90
Join

Comparison

What each access includes

Without an account you already practice. Creating an account is free and removes the time limits. PRO unlocks everything.

Visitorno account Freefree account PROcomplete
Usage time5 min per dayunlimitedunlimited
Pitch test 0 to 100limited
Overtone Challenge1 per daylimitedunlimited
Pitch Challenge3 per daylimitedunlimited
Challenge panels1 (Spectrum)1 (Spectrum)3 + colors
Camera and face in the video
Video with audiowatermarkedwatermarkedno watermark
Synth and reverb
History and progress
Scale, arpeggio and intervals

✓ included · – not included

Live sessions

Polyphonic Lab

More than technique, cultivation. A live online practice group that meets every second Sunday of the month, 10am (Brasília time). It's where we breathe, listen and grow together, with Gui guiding the practice closely.

Upcoming sessions. Dates follow the second Sunday of each month.

2026 Jul 19 Aug 9 Sep 13 Oct 11 Nov 8 Dec 13
2027 Jan 10 Feb 14 Mar 14 Apr 11 May 9 Jun 13
Discover the Polyphonic Lab
📄

Support material

Download the InSpectro guide

A PDF guide to get to know InSpectro in detail. Download it, read it, and come back whenever you like.

Download the guide (PDF)

Common questions

Before you start

Does it work with any voice?

Yes. Every voice has overtones, and InSpectro shows yours. You don't need any singing experience to start seeing and measuring.

Do I need headphones or a special microphone?

No. It works with your phone or computer's own microphone. Headphones are only recommended when you want to hear your voice live with the effects, to avoid echo.

How does billing work?

You can start for free, choose a short pass, subscribe monthly, or buy the lifetime plan once. You can cancel the monthly subscription anytime, directly on Hotmart.

What is the Challenge and the overtone score?

It's how you measure how many layers your voice reveals at the same time. You hold a note, shape the sound, and the score goes up. It's the core feature of InSpectro.

What's the difference between the app and the lessons?

The app is the tool to see, measure and train on your own. The lessons (recorded Tutorial and live sessions) teach the method step by step. The two tracks complement each other.

About the Polyphonic Lab

Who's behind it

InSpectro was born from the Polyphonic Lab, Gui Alves' work with music therapy and polyphonic singing. It brings together vocal practice, breathing, Yoga, deep listening and the physics behind sound in a single experience.

Gui Alves is a multi-instrumentalist from Rio de Janeiro, an integrative music therapist and educator. A scientific researcher in the fields of neuroscience and Ayahuasca (UFRJ), a practitioner and teacher of Ayurveda and Yoga, he has traveled through more than 15 countries offering concerts, music workshops and retreats, using music as a platform for human connection.

He offers integrative multidisciplinary programs of self-knowledge, health and well-being, in Brazil and around the world, individually and in groups.

www.pazciencia.com.br

@guimusic.br

See your voice for the first time

It takes less than a minute and costs nothing to start.

Try the app for free