Free AI Stem Splitter
Split a song into separate vocals, drums, bass, and other stems using AI source separation. Upload MP3, WAV, FLAC, AAC, M4A, or OGG and download each stem individually — no sign-up, no software install.
4 stems
Vocals, drums, bass, and other — not just a 2-way split.
No download
Runs entirely in your browser — upload, process, download.
Free
No sign-up, no watermark, free for everyone.
What is a stem splitter?
A stem splitter takes a fully mixed-down song — a single audio file with everything blended together — and separates it back into individual parts, called stems. Normally, separate stems only exist if a producer kept the original multitrack recording. AI source separation gets around that: a model trained on learned characteristics of what a voice, a drum kit, a bass line, and other instrumentation each sound like reconstructs an approximation of those separate parts from the finished mix alone. That's the same underlying idea as audio source separation more broadly — it's why producers, remixers, and DJs use it to get usable stems from a track they only have as a finished MP3 or WAV.
4-Stem Separation: Vocals, Drums, Bass & Other
Every upload is split into these four stems in a single pass:
Vocals
Lead and backing vocals, isolated from the instrumentation around them.
Drums
The full kit — kick, snare, hi-hats, cymbals, and other percussion — separated as one combined drum stem.
Bass
Bass guitar or synth bass, covering the low end of the arrangement.
Other
Everything that isn't vocals, drums, or bass — guitars, keys, synths, pads, strings, and any remaining instrumentation, kept together as a single stem rather than split further into individual instruments.
Who is this for?
Producers pulling isolated drum or bass stems to sample and rebuild around, remixers who need more than just an instrumental, mashup artists layering elements from multiple tracks, and anyone studying an arrangement instrument-by-instrument all use this tool for the same underlying job — splitting a full mix into its four core components.
Stem Splitter vs. Vocal Remover
| Stem Splitter | Vocal Remover | |
|---|---|---|
| Vocals | ||
| Drums | Combined into instrumental | |
| Bass | Combined into instrumental | |
| Output | 4 separate stems | 2 stems (vocal + instrumental) |
| Best for | Sampling, remixing individual elements | Karaoke, simple instrumentals |
Just need vocals out of the way? The Vocal Remover does the same separation and hands back one clean instrumental instead of four stems to sort through.
How to Split a Song Into Stems
- Upload an MP3, WAV, FLAC, AAC, M4A, or OGG file.
- AI source separation splits the track into vocals, drums, bass, and other — usually a few minutes, depending on length and server load.
- Preview and download each stem individually, directly in your browser.
Need a track from YouTube first? Use the YouTube Stem Splitter to skip the manual download step entirely.
How 4-stem separation works
This tool uses the same AI source-separation model as our Vocal Remover, but keeps all four of the internally separated components instead of combining three of them back into one instrumental track. The model analyzes learned characteristics of what a voice, a drum kit, a bass line, and everything else each sound like, and separates all four simultaneously in a single pass, outputting full stereo audio for each stem.
Because this runs on CPU rather than expensive GPU infrastructure, a single track takes a few minutes and usage is rate-limited per person so it stays free and available for everyone. No download, install, or account is needed — everything happens in your browser.
Want the fuller technical breakdown — why bass and drums are the hardest pair to separate, and what Studio Quality actually buys you? Read How AI Stem Separation Actually Works.
Standard vs. Studio Quality
| Standard | Studio Quality | |
|---|---|---|
| Processing time | A few minutes | 10–20 minutes |
| Separation quality | Good for most tracks | Noticeably cleaner across all four stems |
| Best for | Quick previews, casual use | Sampling, remixing, anything going into a final mix |
Studio Quality uses a larger, ensembled model rather than a single pass, which is why it takes considerably longer — the trade-off is worth it when the stems are headed into an actual production, not just a quick check.
Supported Audio Formats
Upload any of the formats above, up to 50MB per file. Output stems are delivered as individually downloadable audio files.
Stem Splitter isn't perfect
Separation quality depends heavily on how densely the source track is mixed. Bass and low guitar can bleed into each other since they occupy similar frequency ranges. Programmed drums with heavy processing sometimes separate less cleanly than an acoustic kit. Live recordings with crowd noise or stage bleed give the model a messier signal than a controlled studio mix. None of this makes separation fail outright — it just tends to leave more audible traces behind on a dense or heavily processed mix than on a sparser, cleaner one.
Common uses
Sampling & production: pull an isolated drum loop or bassline to build a new track around.
Remixing: replace or rework individual elements instead of starting from a full instrumental.
Practice & study: isolate a bass or drum part to learn it note-for-note without the rest of the mix in the way.
Mashups: combine stems from different tracks — a vocal from one, drums and bass from another.
More free tools
Vocal Remover
Split a track into vocal and instrumental stems.
Key & BPM Finder
Detect musical key, tempo, and Camelot notation.
YouTube Stem Splitter
Paste a YouTube link and get vocals, drums, bass, and other stems directly.
YouTube to WAV
Convert YouTube videos to WAV or MP3 audio.
YouTube Key & BPM Finder
Paste a YouTube link and get its key, BPM, and Camelot code directly.
Copyright & fair use
You are responsible for ensuring you have the right to process any track you upload — for personal practice, content you own, or material you have permission to use. AudioForges does not host or distribute the tracks processed through this tool.
See our About, Privacy, and Terms pages for more on how AudioForges handles uploaded files.