AI Auto Mixer Online
Sit the vocal right on top of the beat.
Smart frequency unmasking carves space for your vocal in the mix — professional mixing in seconds.
Your song on every platform · Pro for $1
Make it today, release it on Spotify, Apple Music, YouTube and TikTok. Commercial license included.
This tool is free. Your own songs are $1.
Pro writes 5 brand-new songs from your words, music and vocals, in your first month for $1. Release them on Spotify, YouTube, TikTok and more, and your earnings stay yours. Cancel anytime.
No track to work on? Make one from scratch.
Type an idea or your own lyrics and SongUp AI composes the whole song — music and vocals. Your first one is free.
Highlights
Frequency Unmasking
Dips the beat up to 6 dB around 2.5 kHz, the range where words are understood, so the vocal cuts through.
Sidechain Ducking
Automatically lowers the beat volume when the vocal is active, just like professional producers do.
Zero Knowledge Needed
No EQ or mixing skills required: levels, EQ, compression, reverb and a limiter are set for you, and every slider can be changed.
Create music with SongUp AI. Publish it everywhere. Earn from your streams.
How it works
Upload vocal
Drop your vocal or acapella. Use the Acapella Extractor to isolate vocals from any song.
Upload beat
Drop the instrumental to mix under the vocal. Both tracks are levelled to the same starting point.
Download mix
Preview the mix live, adjust the sliders, then download it as a WAV file.
About the AI Auto Mixer Online
By Ismail Farooq, founder of SongUp AI · Updated 27 October 2026
Completely free: free account, no card needed, no credits, no limit. It runs in your browser, so your audio stays on your device.
SongUp AI’s Auto Mixer mixes a vocal over a beat automatically, free online with a free account. Drop in a vocal and an instrumental: it levels both, dips the beat where the voice sits, ducks the beat while you sing, compresses the vocal and adds reverb. Preview it live, then download a WAV. Nothing is uploaded.
What it does to your two tracks: it brings the vocal’s loud parts to −18 dBFS and the beat’s to −16 dBFS, so the starting balance works for a phone recording and a mastered beat alike. EQ Unmasking cuts up to 6 dB from the beat around 2.5 kHz, the range where words are understood. Sidechain Ducking lowers the beat by up to 9 dB while the vocal is loud and ignores breaths. The vocal gets a 90 Hz low cut, 4:1 compression and a plate-style reverb, and a limiter keeps the peaks at −1 dBFS, so the download never clips.
It is a two-track vocal-and-beat mixer, not a multitrack mixing desk: there is no panning and no per-instrument EQ. If you only have a finished song, split it first with the Stem Separator or the Acapella Extractor. For the final loudness of a release, run the mix through AI Mastering.
What you can use it for
- ✓Mix a rap or singing vocal over a purchased or AI-generated beat
- ✓Get a clean rough mix of a demo before sending it to collaborators
- ✓Fix a vocal that sounds buried under the instrumental
- ✓Put an acapella over a new instrumental for a cover or remix
Common questions, answered
Frequently asked questions
Is there a free AI auto mixer online?
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Yes. The SongUp AI Auto Mixer is free with a free account: no credits, no watermark and no limit on mixes. It runs in your browser, so your vocal and beat are never uploaded, and you download the mix as a WAV file.
How do I mix vocals with a beat automatically?
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Upload your vocal, upload the instrumental, and press play to hear the automatic mix. Adjust Vocal Gain, Beat Volume, EQ Unmasking, Sidechain Ducking and Reverb if you want, then choose Render & Download to save the mixed WAV.
What files do I need?
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A separate vocal track and a separate instrumental. If you only have a finished song, split it first with the Stem Separator or take the vocal with the Acapella Extractor.
Can it mix more than two tracks?
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No. It mixes one vocal over one beat. To balance stems from two different songs, use AI Blend; to put the vocals of one song over another song automatically, use the Mashup Maker.
Does it replace mastering?
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No. Auto Mix balances the vocal and beat; use AI Mastering afterwards to set the final loudness and tone.
Which formats are supported?
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You can upload MP3, WAV, M4A, FLAC or OGG. The mix downloads as a WAV file.
Are my files uploaded to a server?
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No. The mix is built and rendered inside your browser, so the audio never leaves your device.