Mirinex

Singing in your key · Updated 2 October 2026

Change a song’s key for your voice
without changing its tempo.

To change a song's key without changing its pace, adjust Pitch (semitones) and leave Speed (%) at 100. Try small shifts until both the high and low phrases sit comfortably in your voice.

You do not need to know the original key to start. If you want a named reference for rehearsal notes or other musicians, check the song with the BPM and key finder first. Treat the detected key as an estimate and confirm it by listening.

Find a useful key, one semitone at a time

  1. Choose the song or backing track. Select Choose a file in the pitch changer. Use the recording you want to rehearse with, such as a WAV, MP3 or M4A.
  2. Keep the original tempo. Leave Speed (%) at 100. Pitch and speed have separate controls, so you can move the key while keeping the pace.
  3. Move Pitch (semitones). Negative values move the song lower; positive values move it higher. Start with one semitone in the direction you need.
  4. Press Play and sing the difficult phrases. Test the highest part of the chorus and the lowest part of the verse. A key that helps the chorus can make the verse too low, so check both.
  5. Compare nearby settings. Try another semitone, then return to the previous setting. Choose the smallest useful shift rather than moving far from the original automatically.
  6. Download WAV. Once the key fits, select Download WAV. Give the file a name that includes the song and pitch change, such as “rehearsal minus 2 semitones.”

What does a semitone change do?

A semitone is one step between neighbouring pitches, such as C to C-sharp. Moving up two semitones takes C to D; moving down two takes C to B-flat. The same shift is applied across the recording, so the intervals within the performance stay together.

Use the sign of the change in your rehearsal notes. “Minus 2” tells someone the backing track is two semitones below the source, while “plus 1” means one above it. If you share a named key, check that it describes this saved version.

Make a karaoke backing track in the new key

If the original singer makes it hard to hear your own voice, use Make karaoke in this key below the pitch result. That sends the adjusted audio to the karaoke maker. Select Music there for the accompaniment, or mix in a quiet guide vocal while learning.

You can also make an instrumental first with the karaoke maker, download it, and then choose that file in the pitch changer. Keep the final key and tempo consistent across the versions you rehearse with.

Change speed only when you want a different pace

To slow a difficult passage for practice, lower Speed (%) separately. Listen again before downloading, because that produces a different rehearsal tempo. Return speed to 100 when you want the shifted key at the original pace.

The tool changes the pitch of the whole recording. It does not correct individual notes sung out of tune, change only one singer, or rewrite the melody. Larger shifts can also change the character of voices and instruments, so audition the complete passage you intend to use.

What file will I get?

The pitch changer downloads the adjusted audio as WAV, including when the source is a video. If you need it with a picture, place the WAV in your video editor. A speed change also changes the audio's duration, so plan the picture edit accordingly.

Find a key that fits your voice

This one runs right in your browser. Pro adds the AI tools too: vocals, stems, captions and more.