Stem-aware DJ mix builder · Windows & macOS

Mixes that fix their
own clashes

Mixdis is a desktop mix builder for DJs. Drop in your tracks and it splits each one into drums, bass, melody and vocals, beat-matches them without changing their key, and blends the stems so the vocals, bass and melodies of two tracks never fight. Everything runs on your own machine.

Runs on Windows macOS (Apple silicon) · no account, no cloud
Mixdis — set, mix timeline and stem waveform
The Mixdis window: the set list and transition controls at the top, a mix timeline with overlapping tracks and their stem waveforms in the middle, and a zoomed waveform with the beat grid below.
The idea

A blend is only as good as what overlaps

Two tracks can be perfectly beat-matched and still sound wrong, because the wrong parts are playing together.

A normal crossfade mixes two whole tracks. If both have a lead vocal, or both have a heavy bassline, or the keys don't agree, the overlap turns to mud — and you can't fix it without touching the whole track.

Mixdis separates every track into four stems — drums, bass, melody and vocals — then automates each stem across the transition. It finds where the tracks clash, ducks only the stems that clash, and shows you every fade on the timeline so you can drag any of it. Tracks are matched in tempo with pitch-preserving time-stretch, so each one keeps its own key.

Try it: one transition, four stems

track A in fulltrack B in full
track A (going out) track B (coming in) An illustration of the idea — not a recording.