A scale changer moves a song to a new scale, meaning a new Sa (home note), without changing its speed. Open a song in the tool below: it finds the scale, shows it as a note and a harmonium name such as Safed 5, and moves the song to the scale you tap. Nothing is uploaded.
Change the Scale of a Song
Open a song, see its scale (Sa), then tap the scale you sing in. The tempo stays the same.
Start with Step 1: choose a song from your device.
Scale of the song
Step 2 Tap your scale
Same scale as the song Open a song first. Then tap a key: the number on it is the shift in semitones.
Top row: black keys (Kali 1–5). Bottom row: white keys (Safed 1–7). The key with the cyan bar is the song's scale.
Nearest takes the smallest shift. Higher or Lower always moves the song up or down.
Tempo: unchanged. Only the scale changes.
Open a song to listen to it here.
The waveform of your song appears here
More options (fine tuning, voice, file format)
Related tools
How to change the scale of a song online
- Open the song. Tap Choose a song or drop the file on the tool. MP3, WAV, M4A, OGG, FLAC and the sound of a video work.
- Check its scale. The tool listens for the Sa and shows it three ways, for example G · Safed 5 and the Western key G major. If you know better, choose the scale yourself from the menu.
- Tap your scale on the harmonium keys. Each key shows the shift in semitones. Nearest picks the smallest move; Higher or Lower forces the direction.
- Listen and download. Switch between Original and New scale at the same moment of the song, then download an MP3 or WAV named with the new scale, like
song_E-scale_-3st.mp3.
Your scale stays selected: open the next song and it moves to the same scale by itself. More options holds fine tuning in cents, a voice setting that keeps a solo singer natural, and the file format.
What “scale” means in Indian music
In Indian classical, devotional and film music, the scale (also called patti) is the pitch of Sa, the first note of the sargam. Everything else, Re, Ga, Ma, Pa and the rest, is sung relative to it, and the tanpura, harmonium and tabla are tuned to it. When a singer says “I sing in Kali 2”, they are naming their Sa by the key they press on the harmonium.
The Western word for the same idea is the tonic, and a Western song key adds the mode: G major and G minor share the tonic G, so in harmonium terms both are Safed 5. Changing the scale therefore means transposing the whole song so that its Sa lands on a new note, with every interval kept. Turning major into minor is a different job, done by the major to minor converter.
Scale changer or key changer? They do the same transposition; this page speaks in Sa and harmonium names, while the online key changer speaks in Western key names such as E♭ major.
Scale, key and harmonium name chart
Many harmonium teachers, tabla makers and singers name the twelve scales after the keys of the harmonium: the white keys are Safed (white) 1 to 7 and the black keys are Kali (black) 1 to 5, counted from C. This is a common convention, not a universal rule, so if a teacher uses other numbers, go by the key they actually press.
| Harmonium name | Sa (Western note) | Also written | Key colour | Semitones above Safed 1 | Sa frequency (3rd · 4th octave) |
|---|---|---|---|---|---|
| Safed 1 | C | – | white | 0 | 130.8 Hz · 261.6 Hz |
| Kali 1 | C♯ | D♭ | black | +1 | 138.6 Hz · 277.2 Hz |
| Safed 2 | D | – | white | +2 | 146.8 Hz · 293.7 Hz |
| Kali 2 | D♯ | E♭ | black | +3 | 155.6 Hz · 311.1 Hz |
| Safed 3 | E | – | white | +4 | 164.8 Hz · 329.6 Hz |
| Safed 4 | F | – | white | +5 | 174.6 Hz · 349.2 Hz |
| Kali 3 | F♯ | G♭ | black | +6 | 185.0 Hz · 370.0 Hz |
| Safed 5 | G | – | white | +7 | 196.0 Hz · 392.0 Hz |
| Kali 4 | G♯ | A♭ | black | +8 | 207.7 Hz · 415.3 Hz |
| Safed 6 | A | – | white | +9 | 220.0 Hz · 440.0 Hz |
| Kali 5 | A♯ | B♭ | black | +10 | 233.1 Hz · 466.2 Hz |
| Safed 7 | B | – | white | +11 | 246.9 Hz · 493.9 Hz |
To move between two scales, subtract their numbers in the “semitones” column: from Safed 5 (7) to Safed 3 (4) is −3, or +9 the long way up. The tool does this for you; how many semitones to change key lists every pair, and the semitone calculator counts between any two notes. New to the unit? See semitones explained.
Which scale suits your voice?
There is no correct scale, only the one that fits your range. As a rough guide, men often sing with Sa between Safed 1 and Safed 3 (C to E), and women often between Safed 5 and Kali 5 (G to A♯). Plenty of good singers fall outside these ranges.
- Find your lowest and highest comfortable notes with the vocal range test, or check your voice type with the voice type test.
- A practical starting point: put Sa about five semitones above your lowest comfortable note, so the low Pa (mandra Pa) is still easy.
- Check the top: the high Sa (taar Sa), twelve semitones above your Sa, should be reachable without strain. If it is not, go one scale lower.
- Try the song in two or three nearby scales with the tool and keep the one that feels easiest after a full verse.
For songs that feel wrong in any scale, see song too high, song too low and what key should I sing in.
Scale changer harmonium, tabla and this tool
A scale changer harmonium has a keyboard that slides over the reeds, so the player keeps the same fingering while the harmonium sounds in another scale. A tabla is tuned to Sa too, but each drum only reaches a few neighbouring scales. This tool solves the same problem from the other side: it moves the recording to the scale of your voice, your harmonium or your tabla. It does not retune an instrument, and it cannot make a fixed harmonium play in a new scale.
What the tool cannot do
- Separate the voice from the music. The whole recording moves, so a backing track with a singer on it still has the singer.
- Change the raga or the mode. Every note moves by the same amount; the melody stays the same.
- Stay perfect at big shifts. Up to about 4 or 5 semitones a song sounds natural. Beyond that, tabla and voices start to sound thinner or heavier.
- Always name the scale. Songs with only a drone, only percussion or much speech can give no clear Sa; choose it yourself then.
- Change the speed. The tempo stays the same on purpose; for slower practice use the pitch and tempo changer.
Files up to 10 minutes and 200 MB. The audio is processed in your browser and never uploaded. If you already edit in Audacity, see changing pitch in Audacity.
Which tool should you use?
| Tool | Use it when |
|---|---|
| This page | You think in Sa and harmonium names and want the song in your scale |
| Online key changer | You think in Western key names such as F major |
| Karaoke pitch changer | A karaoke track, step by step with ♭ / ♯ |
| YouTube pitch changer | The song is on YouTube and you have no file |
| Transpose music online | You need the chords or notes written in the new scale, not audio |
Questions about changing the scale of a song
What is a scale changer?
A tool that moves a song to a new Sa. Every note rises or falls by the same number of semitones, so the song keeps its melody and speed but sits higher or lower for your voice.
Is changing the scale the same as changing the key?
Yes, in practice. “Scale” is the Indian way to name the Sa; “key” is the Western way and adds major or minor. Moving the song from G to E is the same −3 semitone shift either way.
What is Safed 1 or Kali 1?
Harmonium names for scales. In a common convention Safed 1 is C, the first white key, and Kali 1 is C♯, the black key next to it. The chart above lists all twelve.
Does the song get faster or slower?
No. The tempo and the length stay exactly the same; only the pitch changes.
Is there a scale changer app?
You do not need one. This tool runs in the browser on phones, tablets and computers, with no install, sign-up or watermark.
Is my song uploaded?
No. The file is opened and changed on your device. Nothing leaves your browser.
Tested: what we measured
- 8 exported files from −12 to +12 semitones were measured again: pitch within 0.1 cents of the target, length unchanged to the sample.
- The scale was found correctly in 24 of 24 test songs (12 major, 12 minor, all 12 scales).
- The harmonium names on all 12 keys match the chart above.
- The preview you hear equals the downloaded file sample for sample.
Last updated 28 September 2026 by Mayer. See all pitch tools, the online pitch changer home page, or how it works.