Isolate the bass line of any song

To hear the bass line of a song on its own, split the song into stems and solo the bass. zann does this free in the browser: upload a file or paste a link, wait about a minute, then press S on the bass row and the line plays with nothing on top of it.

Bass is the part most often buried in a mix and the part that benefits most from separation. On the full song you hear the kick, the low end of the guitars and the bass as one blur. On the stem, the notes are clear enough to learn.

Split a song now

How it works

Upload an MP3, WAV, FLAC, OGG, AAC, MP4 or MKV file up to 50 MB, or paste a link from YouTube, SoundCloud, Bandcamp, Suno and a few other sites. zann uses the htdemucs model to separate the song into drums, bass, vocals and other (guitars, keys, synths and the rest). Expect one to three minutes.

Each stem gets a waveform, with solo, mute, volume and pan. The four stay in sync, so you can solo the bass, then unmute the drums to hear how the two lock together, then bring the whole band back in. Click a waveform to jump to a spot; spacebar plays and pauses.

Learning a line by ear

Work from the stem, not the full mix. Pick a two- or four-bar riff, click to its start, and listen to it repeatedly before touching your instrument; most bass lines are built from a few short figures that repeat with small changes, and hearing the figure twenty times in a row makes those changes stand out. Then play along with the stem soloed, and finally with everything unmuted. Compare by ear each time. The listening checklist goes through this habit step by step.

The "Find the groove" panel under the player helps you orient: a tempo estimate, a 16-step map of where the drums and bass hit in the bar, a rough key, and the four pitch classes the bass plays most often. Treat these as hints. The key guess comes from the other instruments and can disagree with the bass; when it does, the bass notes usually settle it. Nothing here replaces listening.

Drummers do the mirror exercise with drumless tracks; soloing bass and drums together shows the groove as a pair, including the gaps the bass leaves for the kick.

What to expect from the separation

htdemucs puts the bass guitar or bass synth into the bass stem reliably on most recordings. Where the line sits in the same register as a low synth pad or a baritone guitar, some of that can bleed in, and the kick drum's low end occasionally shows up as a faint thump. Very distorted bass tones separate less cleanly. You may hear a slight warble on sustained notes. None of this normally stops you reading the notes; when a passage is unclear, check it against the full mix and trust your ear.

Singers use the same split to make backing tracks, and producers to extract a vocal. Formats and limits are on the stem splitter page.

Use audio you own or are allowed to use, for your own practice. Separating a song into stems does not transfer its copyright. Files are processed on zann's servers.

FAQ

How can I hear just the bass in a song?

Split the song into stems and solo the bass stem. In zann, upload the song or paste a link, wait about a minute, then press S on the bass row. Everything else goes silent and the bass line plays on its own.

Does zann show me the bass notes?

Partly. The Find the groove panel lists the pitch classes the bass plays most often and a rough key, as estimates. It is not a transcription or tab; the stem itself is what you learn from.

Can I slow the bass stem down?

Not in the browser player yet. Download the stems as MP3 and open the bass file in any player or DAW that can slow audio without changing pitch.

Why does the isolated bass sound a bit odd in places?

Separation is an estimate. Low synths, kick drums and the low end of guitars can bleed into the bass stem, and some notes may warble slightly. It is usually clear enough to learn from; if a passage is ambiguous, check it against the full mix.

Is this free?

Yes. No account, no payment. Files up to 50 MB, or paste a link.