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Transposer
Move a piece to another key — written correctly, not just shifted — then hear it there.
Hot Cross Buns
In C major, as written.
76 BPM
Tap a note to start from there
4 bars
Pick a different key to save a copy in.
About this tool
Transposing is more than adding a fixed number of semitones. Shift C to E flat by counting alone and you can end up with D sharp, which sounds right and reads wrong, and the further a piece travels the more of these accumulate.
This transposes by interval and respells as the destination key requires, so the result is what a copyist would have written. You can hear it in the new key before committing, which usually settles whether the change is the right one for a singer's range.
How to use it
- Enter or choose the music you want to move.
- Pick the destination key, or shift by an interval.
- Read the respelled result and play it back.
Questions
- Why not just move everything up by semitones?
- Because the spelling would be wrong. The distance is right but the note names are not, and a player reading D sharp where the key calls for E flat is reading against their own key signature.
- Can I transpose for a B flat instrument?
- Yes. Transposing up a major second gives the written part a clarinet or trumpet player needs to sound in concert pitch.
- Will it change the key signature too?
- Yes, that is the point. The result carries the destination key's signature, with accidentals adjusted to match.