Stems that never drift apart
All rows share a single playhead and waveform timeline. Play, seek, jump 10 or 30 seconds and set the master volume once; every part follows.
Mix stems online in a synchronized browser mixer
AudioStem.ai is a multitrack mixer that runs in your browser. Every stem of a track, whether AI separated it from a song or you added it yourself, plays from one shared transport, so the parts stay locked together while you balance, mute, solo, trim and shape them.
When the balance is right, you keep it: on Studio the custom mix you export carries your faders, mutes, edits, fades, EQ, key and effects, so the file you download is the version you were listening to.
Start free, no card required
What the mixer does
Volume, Mute and Solo on every row
Pull the drums down, mute the vocal, or solo the bass to check what it is doing, all while the song keeps playing.
Mute, fade and restore one part
Pick a range with A and B, then silence it on a single stem or fade that stem in or out across it. The source file is left untouched, so any range can be brought back.
Your order, your rows
Reorder the stems so the list reads the way you think about the song, and permanently remove a stem you will never use once you have seen how much storage it frees.
Your own audio as extra stems
Studio adds an mp3, a wav or the sound from a video as another row, lets you nudge it earlier or later to line it up, and can start from an empty track built only from your own stems.
Download the mix you hear
Every paid plan downloads individual MP3 stems. Studio adds lossless WAV, the full custom mix and a download of just the A/B region.
How it works
- 1
Open a track
Separate a song, open one already in your library, or on Studio create an empty track and add your own recordings as stems.
- 2
Find the section
Click a waveform to move the playhead, or drag across it to set A and B. Type the markers instead when you need them exact, to a hundredth of a second.
- 3
Balance and edit
Set volume, Mute and Solo per row, then mute or fade the selected range on any stem that needs it. Undo All clears every edit on that one stem.
- 4
Shape and export
Add EQ and, on Studio, the effects racks, then download stems or the exact custom mix.
Why mix in the same place you separate
The usual route after splitting a song is to download a folder of stems, import them into a desktop audio workstation, line them up and start again. That is a lot of setup for a quick backing track, a practice mix or a quick check of how one part was played.
Here the stems arrive already aligned on one timeline, with the controls attached. You can make mixing decisions while you listen, and long jobs such as separation, analysis, cleanup or mastering run in the background while you carry on working. The Working on list keeps them visible if you refresh or close the tab, and finished results come back to the same song.
Editing a stem without touching the others
Stem editing in AudioStem.ai is deliberately focused on the jobs people need most from separated audio. Set an A/B range, then choose what happens to that range on one stem:
- Mute A–B: the stem goes silent between A and B, for example to drop a vocal ad lib or a guitar fill.
- Fade in or fade out: the stem ramps up or down across the range, so a part can enter or leave smoothly.
- Restore: bring back the original audio for the selected range after a mute or fade.
- Undo All: clear every edit you made on that stem in one step.
What your edits carry into
Edits are kept as instructions on top of the original stem rather than written into it, which is why restore always works. Those instructions follow the stem everywhere it is heard: playback, custom mixes, share links, loudness normalization and HD mastering all use the edited version.
Practice speed is the one exception by design. Slowing a song down changes playback only, so an export always plays at the original tempo.
Building a track from your own stems on Studio
Studio turns the mixer into a place to assemble music, not only to take it apart. Add a recording to an existing track as an extra stem, for example a guitar take to play against the separated band, or start an empty track and fill it entirely with files you bring, up to 10 per track.
Each custom stem can be moved by an exact number of seconds, down to hundredths, or reset to where it started. The chord lane and the metronome are rebuilt to fit the new arrangement. Custom stems use storage only and never spend separation minutes. A finished Studio cleanup or mastering result can join the mixer the same way, as another row.
From mix to finished file
On Studio, a custom mix export includes your volume, mute, stem edits, fades, EQ, key and effects choices, and HD Master can rebuild the same audible mix. Individual stems download as MP3 on every paid plan and as lossless WAV on Studio. The mixer works on a desktop or on a touch screen, so you can check a balance on a tablet without moving to another app.
Which plan you need
Free plays and mixes stems in the browser, with the player, mixer, A/B loop and EQ, for 20 full-length songs a day. Free tracks are cleared after 24 hours, and downloads need a paid plan.
Starter, at $4.99 per month, adds MP3 stem downloads and 10 GB of storage, with stems kept for as long as you subscribe.
Studio, at $9.99 per month, adds custom stems and empty tracks, effects racks for every stem and the master, lossless WAV and custom mix exports, and 50 GB of storage with stems kept for as long as you subscribe.
Questions
Is the online audio mixer free?
Yes. Free includes the synchronized player, the mixer, the A/B loop and EQ for every stem in the browser. Downloading stems or a mix is part of the paid plans.
Do the stems stay in sync while I seek and loop?
Yes. Every stem shares one transport and one waveform timeline, so seeking, jumping, looping and muting never shift one part against another.
Does muting part of a stem delete the audio?
No. The original stem file is not rewritten. Mutes and fades are stored as edits, so you can restore a range or clear every edit on a stem with Undo All.
Can I mix my own recordings with separated stems?
On Studio. Add an mp3, a wav or a video’s sound as an extra stem, then shift it earlier or later until it lines up. You can also start an empty track built only from your own stems, using storage and no separation minutes.
What does the exported custom mix include?
On Studio it includes your volume, mute, stem edits, fades, EQ, key and effects. Practice speed is not included, so the export plays at the original tempo.
Can I export only one section?
On Studio, yes. Set A and B and download only the selected region.
Does the mixer work on a phone or tablet?
Yes. The same mixer runs on desktop and on touch screens in the browser, with nothing to install.
Keep going
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.
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 mastering
Master a mix or a single stem online: four HD mastering styles, AI denoise and reverb removal, LUFS loudness targets and 48 kHz audio super resolution.
Music practice tools
Practice with any song: slow it down without changing pitch, change the key, loop a hard section, follow live chords and BPM, and solo the part you play.