Vocal Warm-up & Practice

Sing. Your Key. Your Tempo.

sing·scale plays scales and vocal exercises on piano. You sing along — no scoring, no pressure.

Free · Runs everywhere — Mac, Windows, iOS & Android

sing·scale App

sing·scale plays — you sing. The app provides the piano accompaniment for scales and other vocal exercises, so you can focus entirely on your voice. Which syllables or vowels you sing is your choice — or your coach's. Whether you're warming up before a performance, training daily, working on ear training, or exploring scales and music theory: sing·scale is your piano partner.

Choose your voice type — soprano, mezzo, alto, tenor, baritone, or bass — or set your own custom range.

Features

Start Instantly

No onboarding, no mandatory account, no score to worry about. Open sing·scale, pick a scale, and sing. That's it.

Your Control

Choose your key, tempo, and direction freely. Up, down, or both — exactly like your teacher at the piano, just without the scheduling.

Always Ready

Installable as a PWA directly from your browser — no app store. After the first launch, sing·scale runs fully offline and keeps playing when your screen turns off.

Your Own Patterns

When standard scales aren't enough, build your own. Exotic modes, riffs from your favourite artist, interval sequences from your last lesson — you define the notes, sing·scale plays them.

Three steps. No setup.

Open the app in your browser — no download, no login.

Pick a key and a scale. Or just start.

The piano plays. You sing along.

What is sing·scale for?

When to use it

  • Warming up before rehearsal or performance
  • Daily vocal training — 10 to 20 minutes, consistently
  • Working through exercises your vocal coach assigned
  • Ear training and music theory practice
  • Independent practice anywhere, anytime — offline included

What you practice

  • Major scales
  • Minor scales
  • Pentatonic scales
  • Arpeggios
  • Modal scales
  • Interval studies
  • Chromatics

With the Custom Builder, you go further: your own patterns, riffs, or the interval sequence your coach wrote down last week — just enter it and start singing.

Who uses sing·scale?

Singers

Independent singers need reliable accompaniment — not an app that judges, but one that simply plays.

Students

No piano at home? No problem. sing·scale gives vocal students the accompaniment they need for daily practice.

Coaches

Vocal coaches can use sing·scale in lessons or hand it to students as a home practice tool — including custom exercise sequences with the Custom Builder.

sing·scale doesn't judge.

No score. No "wrong note" alerts. No AI telling you whether you're good enough. The tool plays. You sing. What happens in between is yours.

Built by

Jan Napitupulu

Musician · Singer-Songwriter · Vocal Coach · Developer

There's a moment Jan knows well from his lessons: a student sings an exercise, gets it right — and then goes home, no piano, and the exercise is gone.

Sometimes it's a riff. They build it together in the lesson, note by note. The student takes it home to work through at their own pace. Jan wanted something for exactly that moment — something that just works.

A simple, accessible tool for this didn't exist. Jan is a musician — and a developer. So he built one.

Ready? sing·scale is already at the piano.

Open App
Vocal Knowledge

Voice Types

sing·scale adapts to your voice — choose your voice type to get exercises suited to your comfortable range.

Soprano

The soprano is the highest female voice type, typically ranging from middle C to high C. What defines the soprano is not simply the range, but the quality of the voice within that range: bright, carrying, with a characteristic resonance in the head voice. For practice, the passaggio transitions — the points where the voice shifts between registers — must be consciously trained so the move from middle to upper range sounds seamless, not broken.

Mezzo-Soprano

The mezzo-soprano sits between soprano and alto and is, in reality, the most common female voice type. The range typically runs from A to A², with a characteristic warmth in the middle voice and a darker color than the soprano. For mezzos, training the bridge between the middle and upper register is particularly important: the voice carries natural power in the lower range, and it takes deliberate work to bring that fullness upward without pushing.

Alto

The alto is the lowest female voice type, with a range that often begins at F or even E below middle C. The alto voice draws its character from chest resonance: an earthy, full sound that carries in the lower range. For altos, strengthening the chest voice deliberately while preserving flexibility in the middle and upper range is essential — a common mistake is practicing almost exclusively in the low register.

Tenor

The tenor is the highest male voice and one of the most studied voice types in classical music. The typical range runs from C to C², with the tenor voice developing its characteristic brilliance in the upper middle register. For tenors, training the mixed head register is critical: the transitions between chest and head voice must hold under the pressure of live performance.

Baritone

The baritone is the middle male voice type — and the most versatile. The range sits between G and G¹, with a characteristic fullness in the middle register. Baritone roles dominate the operatic and musical theatre repertoire because this register has a natural speech-like quality that works for both heroes and antagonists. For practice, the connection between spoken and sung resonance is a central focus.

Bass

The bass is the lowest male voice type, with a range typically spanning from E to E¹. What needs particular training for basses is, paradoxically, not the depth but the upper middle register: basses tend to push in higher passages because the instrument's natural resonance sits low. A bass who develops flexibility upward opens up a significantly broader repertoire.

Vocal Exercises Explained

What you're actually training when you sing scales — a short guide to the exercises in sing·scale.

Vocal Range
Vocal range is the full span of pitches a singer can produce — from the lowest note to the highest. It is distinct from tessiture, which describes the narrower zone where the voice sits most comfortably and sounds its best. Knowing your range helps you choose exercises that challenge without straining. Range expands gradually through consistent practice: not by pushing the extremes, but by strengthening the middle and developing flexibility at the edges.
Arpeggios
An arpeggio is a broken chord — instead of sounding the notes simultaneously, you sing them one after another: root, third, fifth, octave. For singers, arpeggios train your sense of intervals within a key and develop your ability to move between registers without breaking. A singer who can perform arpeggios cleanly has control over their voice precisely in the moments where melodies make leaps.
Major Scale
The major scale is the foundation of Western singing. Its pattern — whole, whole, half, whole, whole, whole, half — sounds bright, stable, and emotionally positive to our cultural ear. Singers practice it not because it's easy, but because it provides the reference system for everything else: intonation, intervals, tonal awareness. Someone who can sing the major scale cleanly in every register has a reliable internal tuning fork.
Minor Scale
The minor scale — in its natural form — has a flattened third and sixth, giving it a characteristically darker, more emotionally complex sound. There are three variants (natural, harmonic, melodic minor), each making different demands on the singer. The harmonic minor contains a distinctive augmented second that requires particularly precise vocal control. Mastering minor scales opens up the emotional depth of an enormous repertoire.
Pentatonic Scale
The pentatonic is a five-note scale — it removes the friction of semitones and creates an openness that appears in virtually every musical culture in the world: blues, gospel, folk, world music. For singers, it's an ideal training tool because it develops large interval jumps without creating dissonant tension. Many improvisers use the pentatonic as safe ground from which they venture into more complex harmony.
Chromatic Exercise
The chromatic scale moves in semitone steps through all twelve pitches of an octave — no note is skipped. For singers, this is precision work: each semitone must be clearly distinguished from its neighbors, sharpening the ear and training intonation control. Chromatic exercises are especially valuable for singers working in jazz, contemporary classical, or Middle Eastern music, where microtonal precision is essential.
Interval Study
An interval is the distance between two pitches — and the ability to recognize and sing intervals is one of the most fundamental skills in musical training. A singer who has internalized intervals can sight-sing a melody because they hear the distances before they produce them. That is solfège in practice: not memorization, but understanding.
Modes
Modes are scales built from the same notes as a major scale — but starting from a different degree. The Dorian mode starts on the second degree, Phrygian on the third, and so on. Each mode has its own character: Dorian sounds jazzy and introspective, Lydian dreamy and floating, Mixolydian earthy and rock-adjacent. Singers who know their modes understand why a melody feels the way it does — and can deploy that feeling consciously.

Why Daily Vocal Practice Makes the Difference

The voice is a muscle — more precisely, a system of muscles, tissues, and resonating spaces that responds to training like no other instrument. A piano stays in tune whether you play it or not. The voice doesn't. It responds to sleep, to stress, to hydration, to the length of the last break you took. Singers who practice regularly build a kind of muscular memory — the body knows what to do, and producing good sound requires less effort. Take a week off and you'll notice.

This doesn't mean practicing for hours each day. Research from speech science and music pedagogy consistently shows that shorter, regular sessions are more effective than infrequent, longer ones. Ten to twenty minutes daily — focused, with attention on one or two techniques — build capabilities that a single hour per week cannot achieve. The reason lies in neuromuscular adaptation: the brain encodes new movement patterns through repetition, not through duration.

There is a flip side. Singers who go without practice for extended periods — due to illness, stress, or simply lack of time — don't lose the ability, but they lose availability. The voice becomes less flexible, register transitions rougher, control less reliable. This is not cause for alarm, but it is cause for consistency. Building vocal condition is a process that happens in small, daily investments — and one that erodes when that habit breaks.

The psychological dimension matters too. Daily practice sharpens your awareness of your own voice: you hear problems sooner. You learn to protect the voice on difficult days rather than overloading it. And you develop a more honest relationship with your own strengths and limitations — which, in the long run, is a more powerful driver of improvement than any external motivation.

Frequently Asked Questions

Is sing·scale free?

Yes. sing·scale is free and supported by ads — no subscription, no hidden costs, no account required.

Does sing·scale work offline?

Yes. After your first visit, sing·scale can be installed as a PWA and runs fully offline — piano samples included.

What vocal scales and exercises are included?

sing·scale includes major scales, minor scales, pentatonic scales, arpeggios, modes, chromatic exercises, and interval studies — plus a custom scale builder for your own patterns.

Does sing·scale work on iPhone and iPad?

Yes. sing·scale works in Safari on iPhone and iPad and can be saved to your Home Screen as a native-feeling app.

Do I need to create an account?

No. sing·scale requires no login, no email, no account. Open the app and start practicing immediately.

Is sing·scale only for vocal warm-up?

No — sing·scale is a daily practice companion for any vocal exercise. Whether you're warming up, running your full workout routine, or drilling specific exercises your vocal coach assigned, sing·scale plays along. It's built for independent singers of all levels and for coaches who want to send their students home with a reliable practice tool: the coach defines which exercises to do, on which syllables, in which order — sing·scale provides the piano accompaniment.

Does sing·scale support different voice types?

Yes. Set your voice type (soprano, mezzo, alto, tenor, baritone, bass) and sing·scale suggests exercises within your comfortable range.

How does sing·scale make money?

sing·scale is free and supported by ads. No subscription, no hidden costs.

Questions or feedback?contact@singscale.com