Hear your part, or take its place
Solo the bass to catch every note the bassist plays, or mute it and cover that role yourself while the rest of the band keeps going.
Slow down, loop and change the key of any song
Learn a song from the recording itself. AudioStem.ai separates the track into stems so you can solo the part you are learning, or mute it and play along, then repeat the hard bar on an A/B loop for as long as it takes.
Studio turns the same player into a full practice desk: slow the song to half speed without the pitch dropping, move it into another key, read the chords as they go by and keep time with Auto Metronome.
Start free, no card required
What you can do
Repeat the bar you keep missing
Drag the A and B markers on the waveform or type the start and end, with decimals as fine as hundredths of a second. Every plan has the loop.
Slower, at the same pitch
On Studio, playback speed runs from 50% to 120% and the notes stay where they were, so a fast run slows down without sliding into a different key.
Put the song in your key
Studio’s key control transposes the whole track across 12 semitones, for a singer’s range or the key your band plays a cover in.
Live chords that follow the key
Studio shows the chord under the playhead and the ones coming next, can add changes that land between beats, and renames them when you transpose.
BPM, key and a metronome
Studio detects the tempo and the musical key of the track, and Auto Metronome can tick at half, normal or double speed.
How it works
- 1
Separate the song
Upload a file or paste a YouTube link and the default model splits it into vocals, drums, bass and other. On Studio, the six stem model adds guitar and piano.
- 2
Solo or mute your part
Solo it to study the part closely, then mute it to play it yourself. A fader keeps a quiet guide in the mix if you still need one.
- 3
Loop the hard section
Click the waveform to move the playhead, drag along it to mark A and B, or type exact times. The 10 and 30 second jumps move you around the song.
- 4
Slow it down and set the key
On Studio, drop the speed while you learn, bring it back toward 100% as the part settles, and choose the key you will perform in.
Slow down a song without changing its pitch
Slowing a recording the old way drags the pitch down with the tempo, which makes it useless for learning. On Studio the Speed control goes as low as 50% and as high as 120%, and every note stays at its original pitch at each setting.
A routine that works for most players: loop a phrase at 60 or 70 percent until it is clean, then raise the speed in small steps until you are playing with the record at full tempo, or slightly above it to leave yourself some headroom. Speed changes only what you hear; downloads keep the song’s real tempo.
Change the key of a song
Key control on Studio shifts the track across 12 semitones. Singers use it to bring a song into their range before a performance; instrumentalists use it to rehearse in the key a band has chosen, or to run one passage in several keys.
What depends on the key moves with it. The chord lane renames every chord for the new key, so the symbols on screen are the ones you actually play. A Studio custom mix keeps the key you set, and HD Master follows it too, so the transposed version is ready to take to rehearsal.
Find the chords, the BPM and the key
On Studio the player shows the detected BPM and musical key of the track. While it plays, the current chord is shown large and the next changes line up along the timeline, so you can see a change coming before you hear it. Tick Advanced to show the changes that fall between beats, which helps with quick passing chords.
For closer study, Studio can turn one stem or the whole mix into MIDI and hand you the notes of a bass line or piano part to open in other music software. Auto Metronome adds a click: set its tick to half speed to count a slow ballad, or to double to subdivide a fast groove.
Who practices this way
The mixer runs in a desktop browser and on touch screens, so the same session can move from the computer to a tablet on your music stand.
- Guitarists, bassists, drummers and keyboard players: solo the part to work it out by ear, then mute it and play along at a speed you can manage.
- Teachers: solo a single instrument so a student can hear exactly how the part goes, loop the passage the lesson is about and slow it down together.
- Singers: mute the lead vocal, set the key and run the difficult lines on a loop.
- Bands learning covers: agree on a key, loop the transitions and count them in with the metronome.
Which plan you need
Every plan includes the synchronized player, Solo and Mute on each stem, the A/B loop with typed markers and the 10 and 30 second jumps. Free covers 20 full-length songs a day in the browser, and Starter, $4.99 a month, gives 200 audio minutes a month with MP3 downloads.
Studio, $9.99 a month, adds speed from 50% to 120%, key control, automatic BPM and key, live chords, Auto Metronome, MIDI and the six stem model, with 500 audio minutes a month.
Questions
Can I slow down a song without changing the pitch?
Yes, on Studio. The Speed control runs from 50% to 120% and keeps the pitch where it was. It changes playback only, so anything you download stays at the original tempo.
How do I loop part of a song?
Set A and B by dragging across the waveform or by typing the times, which can be typed to the hundredth of a second. The player then repeats that section until you change it. The loop is on every plan, Free included.
Can AudioStem.ai find the chords of a song?
Yes, on Studio. A live chord lane shows the current chord and the ones ahead, can include the changes between beats, and renames the chords when you change the key.
Does it detect the BPM and key?
Studio detects the tempo and the musical key of each track and shows them in the player. Auto Metronome can then tick at half, normal or double speed.
Can I practice with just my instrument removed?
Yes. Separate the song and mute your instrument’s stem. The default model, on every plan, splits out vocals, drums and bass. Guitar and piano get their own stems on Studio, with the six stem model or the Guitar only and Piano/Keys only models, which leave everything else as one backing track.
Does it work on a tablet?
Yes. The mixer runs in the browser on desktop and on touch screens, with nothing to install.
Keep going
Vocal remover
Remove vocals from a song for karaoke, or keep only the vocals for an acapella. Shift the key, loop a section and export your backing track.
AI stem splitter
Split any song into vocals, drums, bass, guitar, piano and more with AI models, then play, mix and export the stems in your browser. Free plan included.
Online audio mixer
Mix stems in your browser on one synchronized timeline: volume, mute and solo, silence or fade a section of one stem, arrange the parts and export the exact mix you hear.
EQ and audio effects
A 10 band EQ and live effects racks for every stem and the master: vocal reverbs and delays, guitar amp and wah, bass octaver, drum punch, width and limiting.