By Sam Ridder — I build and run StemGrab on my own hardware, on my own. Who I am.Upload a song and pull the bass line out as its own clean track — to learn it, transcribe it or sample it — with every other instrument separated too. Free, no account. It's a way to isolate bass from song online free of any watermark, with no install needed first.
Full-quality stems. No account, no per-track fee. Same model and same 192 kbps (or lossless WAV) as the paid tier — tracks up to 15 minutes. Run the split to isolate bass from song online whenever the mood strikes — there's no booking or queue to join first.
Your upload is deleted the moment the split is finished. Want WAV, play-along mixes or longer tracks? The full tool is on the home page.
Split your track free →Bass is one of the cleanest stems our model produces, so you can finally hear exactly what the bassist is playing instead of guessing under the kick. StemGrab isolates it into its own MP3, along with the drums, vocals and everything else from the same upload.
Once you've got the bass on its own, mute it and play along to the rest, or solo it to learn every note. Our practise any instrument with stems guide walks through both. Want a different instrument? Remove or isolate the drums uses the same one-upload flow. Rather read the line than transcribe it by ear? MP3 to MIDI turns the isolated bass into a MIDI track with the actual pitches and note lengths already written out.
Vocals, drums and bass come out remarkably clean on most modern, well-mixed tracks. Guitar and piano are newer, experimental stems and can be rougher, especially in dense mixes; lo-fi, live or heavily reverbed recordings are harder for any tool. Give the tricky ones a listen before you build on them.
Working out a bass line from a full mix is mostly guesswork, because the kick drum sits on top of the bass in exactly the range you're straining to hear, and cheap speakers roll off the bottom two octaves entirely. Isolating the bass removes the guessing: you hear the actual notes, the actual slides, and the ghost notes that get buried under a snare on the record.
Start with the two numbers StemGrab shows next to the stems. The key tells you the root, which narrows the note choices from twelve to about seven before you've played anything, and it instantly explains why a line "sounds wrong" when you've been reading it in the wrong key. The tempo matters because the honest way to learn a fast line is to slow it down: any free audio editor or phone app will play a file at 70% speed without changing the pitch, and knowing the original BPM tells you what you're working back up to.
Then listen for the things a mix hides. Slides and glissandi between notes are usually inaudible in a full mix and obvious in isolation. So is note length, which is most of what makes a bass line feel like funk rather than a sequence of correct pitches. And on fingerstyle playing you can often hear where the player muted a string, which tells you the fingering as much as the notes do.
Bass is one of the cleanest stems our model produces, but there are three predictable failure modes and all three are physics rather than bugs. Kick and sub-bass overlap. On modern productions, especially hip-hop and electronic music, the kick drum and the bass note occupy nearly the same frequencies, so a low sustained 808 sometimes lands partly in the drum stem and partly in the bass stem. If a note sounds shorter than it should, mute the drums as well and you'll hear the rest of it.
Synth bass with a bright edge can be split: the fundamental goes to the bass stem while the buzzy top of the waveform gets read as a synth and lands in "other". The line is still perfectly learnable, it just sounds duller than the record. And upright bass in jazz recordings is the hardest case, because the bow and finger noise share a lot with the room and the cymbals; expect the isolated part to be usable for transcription but not for sampling.
Use the mixer to work around all of this instead of re-uploading. Solo the bass to transcribe, then un-mute the drums to check your timing against the kick, then download selected to take just the bass and drum stems as a practice loop. That two-stem version, bass plus drums with nothing else, is the most useful practice file the tool produces and it costs you nothing extra.
This page is about the bass, but the same split covers every other part too. Drop in the same file to isolate drums from song material instead. That answers how to isolate instruments from a song in general: every stem comes from the same split. And how to isolate drums from a song just means picking that file from the list. Others are really after the vocal, or a whole stem pulled free of the mix — same split, again.
More specific requests land here too: to isolate instruments in a song, isolate instruments from song material generally, or the vocal line pulled out on its own so the lyrics stand alone. If you're trying to isolate music from video, pull the soundtrack out with our video-to-audio tool first, then run the result through here. And if it's specifically the guitar, our practice guide covers pulling a guitar part free of the mix.
Wondering how to isolate bass from a song without touching a waveform editor? Drop the file in, let the split finish, and download the bass stem on its own — no manual editing needed.
StemGrab also works as a bass separator that recognises the bass as its own instrument, pulling it into its own file and leaving the rest of the mix untouched.
To remove bass from song material entirely, keep the other six stems and leave the bass one out of your mix.
How to get rid of instruments in a song is just as simple: download only the stems you actually want and skip the rest.
Prefer to isolate guitar from song material instead of the bass? The same upload returns a guitar stem too, though it's one of our newer, more experimental separations.
The guitar isolator side of the model does the same job on six strings that it does on four, pulling the part into its own file instead of filtering by frequency.
Just want to isolate guitar and nothing else? Grab that single stem from the download list and ignore the rest.
To separate guitar from song recordings with a dense mix, expect a bit more bleed than on the cleaner bass and vocal stems.
Piano works the same way: isolate piano from the same upload, and treat it as experimental on tracks where it competes with a similar-sounding guitar part.
This page is a song splitter first, built around the bass because that's the part people usually come looking for.
As an ai song splitter it runs the same trained model on every upload, whether the download is just the bass file or all seven stems.
Think of it as a song stem splitter that happens to have a bass-focused page here, not a separate bass-only tool.
Under the hood it's the same song splitter ai doing the separation for every stem, bass included.
As an instrument isolator it treats bass, guitar, piano, vocals and drums as five different jobs done in one pass.
This bass file comes out of the same song instrument splitter as the other six stems, all from one upload.
Every stem here comes from the same stem isolator running once per upload, so the bass file and the drum file are made the same way.
This page is built to split song material into every part, not just the bass, all from one upload.
A quick song split gives you all seven files at once, so there's no need to run the upload twice for a different instrument.
The same model that isolates the bass can separate instruments from song material generally — guitar, piano, drums and vocals all come out as their own files.
People also use this page to separate songs into every part at once, not just to pull the bass out.
One upload is enough to extract stems from song files of almost any genre, bass included.
The same process can split instruments from song recordings across the board — the bass page just happens to be the one you found first.
Need to extract instruments from song material beyond the bass? All six other stems come from the same upload, free.
As an ai song separator it doesn't stop at the bass — every instrument in the mix gets its own file.
This ai song stem splitter produces all seven files together, so the bass and the vocal always come from the same run.
Use it to isolate tracks beyond the bass too — drums, guitar, piano and vocals all separate out the same way.
The fastest way to isolate stems from a full mix is still one upload here, with the bass as just one result among seven.
How to separate instruments in a song comes down to one upload — the model does the separating, not you.
How to isolate instruments in a song works the same way whether the instrument you want is the bass or the guitar.
How to isolate tracks from a song is the same one-upload process described above, just applied to whichever stem you need next.
Every upload can separate tracks in a song down to seven individual files, with the bass being the cleanest of the bunch on most mixes.
When you split my song here, the free tier covers files up to 15 minutes and ten uploads a day.
This song splitter free tier has no watermark and no account requirement, on the bass file or any other stem.
As a free song splitter it costs nothing to run the split and download every stem, the bass included.
Being a song splitter online means no install and no download of any app — everything happens on our server, in your browser tab.
This splitter song page isolates the bass along with six other stems, all from one upload.
Used as a song track splitter the free tier processes files up to 15 minutes long, same limit on every stem.
The bass file comes from the same song stem separator as the rest — one model, seven outputs, one upload.
This page lets an ai isolate instruments across the whole mix, not only the bass line.
The plural song stems splitter name returns exactly the same seven files as the rest of this page, bass included.
Yes — the bass comes out as its own MP3, separated from the drums and the rest of the mix. It's one of the cleaner stems on most tracks.
StemGrab gives you the isolated bass file; slow it down or loop sections in any audio player or DAW that supports tempo change.
Seven per song: vocals, drums, bass, guitar, piano, other, and a mixed instrumental (everything except the vocals), all as 192 kbps MP3 plus a zip of the lot.
No. Your upload is deleted the moment it's processed and the stems are wiped from the server within 45 minutes (24 hours if you bought a month pass — that longer window is part of what the pass is for). Nothing is stored, shared or used to train anything — see privacy.
Yes — every upload here returns all seven stems, so you isolate vocals from song material, drums, guitar and piano in the same pass as the bass, no separate step needed.
Yes — StemGrab's bass isolator runs free in the browser: upload the song, it splits out the bass automatically, and you download it as an MP3. No account, no install.
Upload the track to StemGrab and it separates the bass from the rest of the mix automatically — download the version without bass, or the bass on its own, whichever you need.
Yes. StemGrab extracts the bass as its own 192 kbps MP3, free, with no watermark or account.
Drop the song into StemGrab and it isolates the bass line into its own file within seconds — useful for learning a part by ear or sampling it separately.
StemGrab's model splits the mix into seven stems including bass, so the bass comes out as a clean, separate track without you needing any audio editing skill.
Yes — it's model-based separation, not a frequency filter, so it recognises the bass guitar as an instrument and pulls it out cleanly rather than just cutting low end.
Yes — StemGrab works as a bass remover online: upload the song and download the version with the bass pulled out, or the isolated bass on its own, free and with no account.
The model recognises the bass guitar as an instrument, so it pulls that out specifically rather than just cutting everything below a certain frequency.
Yes — whichever instrument is carrying the low end, the model isolates it into the same bass stem, whether it's picked, fingered or synthesised.
Yes — upload the track and download the bass stem free, along with the other six stems, no paid app or plugin required.
Yes, but expect more bleed — crowd noise and room ambience are harder for any separation tool than a clean studio take.
By Sam Ridder — I build and run StemGrab on my own hardware, on my own. Who I am.