Isolate the bass track from a song — or make it drumless
Upload your own copy of a song — a file you have the rights to use — and Stairway2Fast splits it into six instrument tracks, with bass and drums among the cleanest results the separation produces. Solo the bass and you can finally hear the line note-for-note; mute the drums and you've got an instant drumless play-along. This works on uploaded files only — it does not split YouTube videos.
▶ Open the app — the loop & slow core is free, no signup
For bassists: hear the line, not the mix
Every bassist knows the transcription problem: the line you're trying to learn is buried under guitars, keys, and cymbal wash, and the notes you can't quite catch are exactly the ones that make the part. Solo the bass track and the mix gets out of the way — the ghost notes, the passing tones, the spot where the bassist anticipates the chord by half a beat, all suddenly audible.
Then stack the rest of the practice tools on top: frame a two-bar loop around the fill you can't hear, drop it to 0.5× with the pitch untouched, and it's transcription-grade listening — the same phrase, isolated, slow, and in key, repeating until you've got it under your fingers. When you can play it, un-solo the bass, mute it instead, and play the line yourself against the rest of the band.
For drummers: an instant drumless track
The other direction is just as direct: mute the drum track and any song in your collection becomes a drumless play-along. No hunting for "drumless version" releases, no settling for the six songs somebody happened to publish backing tracks for — if you own a copy of the recording, you can sit in on it.
Loop the section with the fill you're working on, slow it down until the subdivisions are honest, and climb back up. The split tracks share the original recording's timeline, so loops and speed changes stay locked to the music — nothing drifts.
Why bass and drums specifically?
Because they're the strong cases, and we'd rather promise you the strong cases. Of the six tracks the split produces (vocals, drums, bass, guitar, keys, other), vocals, drums, and bass separate cleanest — reliably good enough for serious practice and transcription. Guitar and keys are newer and more variable; if those are your target, read the honest quality notes on the play-along track page before spending an upload. This page's two jobs — an isolated bass line and a drumless track — sit squarely in the mature territory.
The record, as always
The uploaded song behaves like everything else in your library: it keeps its named loops ("verse groove", "fill at 1:42"), the speed you left off at, and every minute you practised against it. Weeks later the history shows the climb — which is what turns "I looped it a few times" into a bass line you actually own. If you're building the practice habit first, the free bass and drums workflows on YouTube videos are the place to start — no signup, nothing to upload.
Free vs Pro, honestly
Looping, pitch-preserved slow-down, named loops, and all the practice tracking are free, no signup, on any YouTube video. Track isolation is a Pro feature (£4.99/$6 per month): Pro includes a monthly allowance of song splits, plus cloud sync for your own uploads (uploading itself is free). The free tier isn't a teaser — it's the full practice loop, minus the splitting.
FAQ
Can it isolate the bass (or mute the drums) in a YouTube video?
No. Splitting works only on files you upload — your own copy of a song or your own recording. YouTube videos play through YouTube's own embedded player; nothing is downloaded or extracted from them. If you only have the song as a YouTube video, you can still loop and slow it for free — but isolating a track requires owning a copy of the recording.
How clean are the bass and drum splits?
Bass and drums are among the cleanest stems modern separation produces — along with vocals, they're the mature cases. Expect practice-and-transcription quality on most studio recordings; very dense or lo-fi mixes are harder, as they are for any separation tool. We don't extend that claim to guitar or keys — those are newer and more variable.
Can I slow down the isolated track?
Yes — that's the point. The solo/mute controls live in the same player as the loop handles and speed control, and the split tracks stay in sync with the original timeline at any speed. A soloed bass line at 0.5×, looped over two bars, is about as good as ear-learning conditions get.
Do I need the rights to the song?
You must have the rights to the audio you upload — your own purchases, your own recordings. The split tracks are made from your file, for your own practice use, in your own account.
Hear the line. Or be the drummer. Upload the song, isolate the part that matters, and practise it slow, looped, and on the record.