A Better Way to Change the Key of a Song
Changing the key of a song is one of those things people ask for constantly: a cover that sits in your own vocal range, a backing track for an instrument in a different tuning, a sample that has to match the key of a project. The usual approach is to drop the finished mix into an editor and pull the pitch down a couple of semitones.
That is where it falls apart. A pitch shifter treats a kick drum the same way it treats a sustained chord, so the attacks smear, the cymbals move out of place and the groove loses its punch. The music is in the right key, and it sounds worse than before.
The fix is to stop treating the song as one signal. Split the drums off first, and the tonal part and the percussive part can each be handled the way they need to be.
1. Open the
Drums Extractor —
https://nextgen.uvronline.app/isolate-drums/#model=mel_roformer — Mel-RoFormer is already selected. Upload your file and wait for the separation to finish. You get two stems: Drums and Other.

2. Switch to Mixer and set Pitch. One step is one semitone, the range is −6 to +6, so −2st takes the song down a whole tone. Leave Tempo at 1.00x if the key is all you want to change.
