How the Mashup Maker Lines Up Two Songs
The mashup maker splits each upload into four stems (vocals, drums, bass and other), keeps the vocal from the song you choose and the backing parts from the other, then fits them together in your browser. As an AI mashup maker, it uses a stem-separation model only for that first split. After that, the vocal is time-stretched and pitch-shifted on its own to the backing song's tempo and key, and the drum tracks set the start point. Before separation begins, the pair is checked: a tempo gap over 12%, a key gap over 5 semitones or a tempo that cannot be read rules the pair out, and nothing is charged. When the key read is uncertain you still get the mix, with a note to nudge the vocal up or down a semitone.
Try the Mashup Maker Once Free, Then Keep the Audio Tools
- New accounts get one free mashup, with songs up to 60 seconds each
- Subscribers can use songs up to 6 minutes and 20 MB
- The three tools below use no credits
Key and BPM Finder
See a song's BPM, key, its seven scale notes and three related keys before you pair it in the mashup maker. The file stays on your device.
Slowed and Reverb Generator
Slow a track to between 0.5x and 1.0x, add reverb and a low-pass filter, and download a WAV.
Nightcore Maker
Speed a track up to between 1.1x and 1.5x, with pitch rising as it goes, and download a WAV.
What the Mashup Maker Does With Your Two Songs
Three stages, and you can change the result at the last one.
Split Both Songs Into Four Stems
Each upload is separated into vocals, drums, bass and other. The vocal comes from the song you mark as the singer; the backing parts come from the other song, so two lead vocals never clash. Swap the singer with one switch.
Details
Four Stems
Vocals, drums, bass and other
Swap the Singer
Flip which song supplies the vocal
Private Files
Removed after 24 hours
Why Not Just Use a DAW?
The mashup maker does the one job you would otherwise do by hand in a DAW: putting one song's vocal over another's beat.
Four-Stem Separation
Every upload to the mashup maker is split into vocals, drums, bass and other, so the backing keeps its groove without a second singer.
Tempo Gaps Up to 12%
The vocal is stretched to the backing BPM; a wider gap is flagged before separation, so you are not charged.
Key Shifts Up to 5 Semitones
The vocal moves to the backing key on its own, and you can adjust it by a semitone if it sounds off.
Fix Timing by Ear
If the automatic start drifts, drag the vocal into place and compare; one click brings back the automatic alignment.
Free Re-exports
Change levels, timing or pitch and download again as many times as you like at no extra credit cost.
Deleted After 24 Hours
Uploads and stems stay in private storage behind expiring links and are removed automatically. Nothing is posted publicly.
Use the Mashup Maker in Three Steps
Sign in, confirm you have the rights to both songs, and keep each one at 60 seconds or shorter for the free try.
- 1Step
Add Two Songs to the Mashup Maker
Upload two MP3, WAV, M4A, OGG or WebM files, tick the rights box, and choose which song sings.
- 2Step
Let the Mashup Maker Match Them
Both songs are checked for tempo and key, split into stems, and lined up on the beat.
- 3Step
Adjust and Download
Balance the levels, nudge timing or pitch, listen back, then save the MP3.
