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How It Works
Drop in any recording. Stemulator separates every instrument, transcribes the chords, generates the tabs, and locks the tempo — so you can play along.
Upload The Song
WAV, AIFF, MP3, FLAC, M4A, OGG — drag and drop or pick a file.
Stemulate
Every instrument is isolated. Every chord is mapped. Tabs scroll along with the song.
Play Along
Solo any instrument, slow it down, change the key, loop a bar, follow the tabs.
Take The Guitar Out. Play It Yourself.
Pull out the piano, pull out the guitar, or pull out the ensemble (everything else) — then play your part along to the chord map in real time.
Mute the part you're replacing. The rest of the band keeps playing. The chord strip and tabs scroll along with the song so you always know what's next.
Real-Time Instrument Tabs Of Any Song.
Real-time tabs for guitar, bass, and piano — scrolling along with the song as it plays, pulled directly from the recording.
Watch the tab scroll under a moving playhead. Switch between Chords, Guitar, Bass, and Piano views. Toggle 4-String or 5-String bass. Hit Export Mix to download a printable PDF with the full chord shapes and fingerings.
Every Chord. Every Bar. Every Beat.
Tap Chord Map and Stemulator lays the entire song's harmony out as a scrolling chord grid that plays back in real time.
See exactly what's being played, when. Export the whole arrangement as a MIDI file and drop it on any instrument in your DAW — or download a printable PDF chord chart of the song.
Change The Key Or Tempo With Studio Quality.
Move any song up or down a semitone, slow it to half speed, or both at once — using the same studio-grade pitch and time engines as professional DAWs.
Drop a fast solo to half-speed to learn it. Transpose a track into your vocal range. Match a guitar to your capo position. Pitch and tempo move independently — change one without affecting the other — and the tabs and chord map shift with you in real time.
Loop 4, 8, 16, 32, or 64 Beats.
Tap a loop length and Stemulator snaps to the song's actual bar lines — no clicks, no drift, no manual region trimming.
Drill a chorus until you've got it. Loop a 4-bar verse intro at half speed, then turn looping off and play through to the end. Pair with the metronome and the chord map and you've got a focused practice rig built around the song you're learning.
Lock Wandering Tempos To A Solid Grid.
Live recordings, old soul records, anything cut without a click — they all drift. Toggle Warp To Fixed BPM on and Stemulator detects every beat and rounds the whole song to the nearest whole BPM, locked to a steady grid.
Off by default — leave it off to keep the original feel. Turn it on and loops stop wandering, the metronome stays in time, and the chord strip lines up bar-for-bar with the audio. Original pitch is preserved either way.
Choose Your Metronome.
Stemulator's metronome rides on top of every bar — accenting the 1, holding the time. Pick the metronome sound that doesn't drive you crazy.
Volume slider, on/off toggle, six sounds to pick from. Stays in time even when you slow the tempo, change the key, or punch in a loop.
Learn Any Song. Chord For Chord.
Stemulator turns any recording into a fully transcribed, fully isolated practice rig.
Are You A Producer?
Stemulator splits any song into up to 18 DAW-ready stems with drum splits (kick, snare, hi-hat, toms, cymbals), lead/backing vocal isolation, and MIDI chord map export.
Stemulator For Producers →