Split a song into stems
This is a stem splitter for practice. Drop in a song you already have and the page separates it into vocals, drums, bass, and other. That last stem is the rest of the arrangement: guitars, keys, pads, and anything the model does not file under the first three. People also call the same job stem separation, a stem separator, split stems, a song splitter, or a track splitter. It is one tool, not five products.
The vocal remover is the same split with the vocal stem muted, so the backing stays. Use it when you want to sing or to play over the record. The other pages set a different mute: drums for a drumless track, bass for a bassless track, and Other when you want the guitar and the keys out of the way.
What you can practice here
Once a file is open you can loop a phrase, slow it down without shifting the pitch, or move the pitch in semitones without changing the speed. Tempo and key are estimated on the original mix, in the browser, and shown on the player. A metronome and a count-in sit with the practice tools if you want a click after the drums are gone.
The first split on a new device downloads about 92 MB of model data and then keeps it in this browser. Later songs reuse that file. A larger high-quality download is optional in Help & settings. The sound of the two is nearly the same. The smaller one is the default because the wait is the download, not a different algorithm.
Nothing on this page phones a server with your audio. Decoding, the split, the pitch shift, and the export all happen locally. If you want the longer account of what is stored and what is fetched, it is on the privacy page. How the four stems are produced is on how it works.
How to use it
- Drop a song you already have, or pick one with the button. mp3, wav, m4a, flac, and mp4 with a soundtrack all open. The title is the file name.
- If this browser has never separated a song, let the model finish arriving. Later visits reuse that copy.
- Start with a few seconds of the song when you only want to judge the split, or separate the whole file when you are ready to practice.
- Mute or solo a part, loop a phrase, and move speed or pitch. Saving a mix writes a download on this computer.
The player above stays the tool. Everything under this heading is only an explanation of that same page. You do not create an account, and you do not send the recording anywhere to hear the parts.
What each stem contains
Vocals is the lead voice and whatever else the model treated as singing. A tight double often travels with the lead. A wide choir may not. Drums is the kit: kick, snare, and toms, plus whatever share of the cymbals the model filed there. Bass is the bass instrument, and many long low synth notes land there too. Other is the remainder. Guitar, piano, pads, strings, and most horns live in that one stem together. There is no extra fader that peels a guitar away from a piano.
Hearing a stem by itself is the solo button, after a song has been separated. Hearing the song without that stem is the mute. The original mix stays available until you delete the song from the library on this device.
Limits to expect
Guitar and piano never get stems of their own. Pushing them down means muting Other, and they leave as a pair. A dry studio mix with parts recorded apart comes out cleaner than a live room, a printed wash of reverb, or a master that has been limited until the voice and the kit occupy the same space. The page cannot repair the mix you started with.
A graphics chip finishes the job much sooner. On the processor alone, a full song can take longer than the song lasts, so listening to a few seconds first is the sensible check. The work never moves to a server, which also means a very long file has to fit in memory on this machine. A short clip of the same mix can succeed when the full concert recording does not. Closing other tabs is the useful next step. Nothing here will queue the song on another computer for you.