Audio Key Changer & Detector
Detect the musical key of any audio file, then shift it up or down by any number of semitones — tempo preserved. Free, no account needed.
Drag & drop your file here
or click to browse
Max file size: 200 MB
Your file is processed securely and deleted automatically after conversion.
After upload, expand the Key & Pitch panel to detect the key and set your semitone shift.
How it works
- 1.Upload your audio — MP3, WAV, FLAC, M4A, OGG, and more are all supported.
- 2.The musical key is detected automatically and shown with a confidence score — e.g. "A minor (high confidence)".
- 3.Expand the Key & Pitch panel, choose your semitone shift using the slider or quick-shift buttons, and convert. The output is shifted while the tempo stays identical.
What changes, what stays the same
- Changes:Pitch — every frequency in the recording shifts up or down by the same ratio. A song in C major shifted +2 semitones becomes D major.
- Preserved:Tempo and duration — the song plays at exactly the same speed. No chipmunk effect, no slow-motion.
When to change the key
Singers finding their range
If a song sits just outside your comfortable singing range, shift it down 1–3 semitones. The backing track matches your voice, not the original recording's key.
DJ mixing & key matching
Harmonically mix tracks by bringing two songs into the same key before blending them. Prevents dissonant clashes when transitioning between tracks in a set.
Capo equivalent for digital audio
Guitarists use a capo to shift key without retuning. Apply the same concept digitally — shift a backing track to match your instrument's open tuning.
Music practice & ear training
Transpose a practice track to any key to work on scales and intervals across different tonal centres, or to match the key your teacher is demonstrating in.
Semitone reference
Each semitone is one step on the chromatic scale — the smallest interval in Western music. There are 12 semitones in an octave. The range is −12 to +12.
| Shift | Interval | Example (from C) |
|---|---|---|
| +1 | Minor second | C → C#/Db |
| +2 | Major second | C → D |
| +3 | Minor third | C → Eb |
| +4 | Major third | C → E |
| +5 | Perfect fourth | C → F |
| +7 | Perfect fifth | C → G |
| +12 | Octave up | C → C |
| -1 | Minor second down | C → B |
| -5 | Perfect fourth down | C → G |
| -12 | Octave down | C → C |
Quality note
Large pitch shifts — beyond 5–6 semitones — may introduce audible artifacts, particularly on vocals. The rubberband algorithm used here is high quality, but no pitch shifting algorithm is completely transparent at extreme values. Start from a lossless source (WAV or FLAC) when possible, and export at 192 kbps or higher for the cleanest result. If you also need to change the tempo, use the BPM Changer — both BPM and key shifts can be applied together in one conversion.
Frequently Asked Questions
Common questions about QuickAudioConvert.