Chord Lens
Tools
Chord Lens tools: everything to learn a song by ear
Chords in time with the song, the shape for your instrument, the words underneath, your key, your speed and six stems to mix. Every tool works on the YouTube video you’re watching, in Chrome, and most on your own files in the Studio or the Mac app. Free to start, no ads.
01 / 02 · The toolkits
Every tool.
One song at a time.
Toolkit 01
Find the chords.
Every chord in time with the song, on the instrument you play.
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On YouTube
AI YouTube to Chords
Click Chords under a YouTube video and get the chords in time with it, the shape to play and the words underneath.
How it works -
Your files
AI chord finder
Drop an MP3, WAV or M4A into the Studio and get its chords, key, tempo and sections.
How it works -
Free
Chord shapes
Guitar, bass, ukulele, mandolin or piano, as words, a bar grid or diagrams.
How it works -
Free
Key and BPM
The key and the tempo of every song, there before you press play.
How it works
Toolkit 02
Hear every part.
Six stems from one song, so you can hear the part you’re learning.
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Free to try
AI stem splitter
Six stems from any song: vocals, drums, bass, piano, guitar and the rest, each on a fader.
How it works -
Free to try
AI vocal remover
Take the singer out for a karaoke track, or keep only the voice for an acapella.
How it works -
Free to try
AI guitar stem splitter
Solo the guitar to hear every strum and lick, or mute it and play the part over the band.
How it works -
Free to try
AI drum stem splitter
Solo the kit to learn the groove and fills, or mute it for a drumless track with a click.
How it works -
Free to try
AI bass stem splitter
Hear the bass line the mix buries, or remove the bass and play the line yourself.
How it works -
Free to try
AI piano stem splitter
Hear the piano’s voicings alone, with the piano shapes in time, or take the keys out and play.
How it works
Toolkit 03
Practise it.
Slow it down, loop the hard bar, and move it to a key you can play.
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Only on Chord Lens
Spoken cues
A voice calls the next section and counts you in, plus the dynamics you place: Build, Break, Last Time.
How it works -
Free in Chrome
Slow down and loop
A quarter speed to double in Chrome, half to double in the Studio, with the pitch held. Loop the bar you keep missing.
How it works -
Free to try
Backing track
Mute the part you play and play along with the original band, the chords in time.
How it works -
Free in Chrome
Key changer and capo
Move a song up or down, 12 semitones each way in the Studio, 6 in Chrome. Every chord is re-spelled.
How it works -
Free
Metronome
A click locked to the song’s own beat, at any speed.
How it works
Toolkit 04
Sing it.
The singers out, the words lit line by line, the song in your key.
02 / 02 · Where it runs
Three ways in.
same tools, same account
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Chrome extension
on YouTube · no account
Click Chords under any YouTube video and the chart plays along right there.
Add to Chrome -
The Studio
chordlens.app/studio · any browser
Upload an MP3, WAV or M4A. Sign in with Google.
Open the Studio -
Chord Lens for Mac
M1 and later · Windows and Ubuntu soon
The Studio as its own app, in your Dock, out of the browser tabs.
Download
Why one app
Built for
playing along.
Learning a song by ear used to take four tabs: the video, a chord site, a transposer and a slow-down app. Chord Lens puts them on one screen, all reading the same recording, so the chord you see is the chord you hear, in the key and at the speed you chose.
Each tool is free to use, with no ads. Premium and Pro lift the limits on splitting songs into stems, take longer songs, and add printing and lyrics for songs that have none. New tools join this page, and the Tools menu at the top of every page, as they ship.