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It generates chord progressions. Pick a key and mode and it writes musically sound, functional progressions — proper tonic / subdominant / dominant motion and real cadences — that you can audition, edit, and export to your DAW.

Choose a key, mode, and length, then tap Generate. Mediant offers several progressions ranked best first; tap Regenerate to cycle through them and keep the one you like.

Brightness shifts the palette from darker and modal toward brighter and major. Tension controls harmonic color: at the low end you get plain diatonic triads; as you raise it Mediant adds 7th chords, then secondary dominants, borrowed chords, mode mixture and tritone substitutions.

Yes. Tap any chord in the timeline to select it, then swap it for another from the palette, or move, duplicate, or delete it. You can generate a starting point and tweak it, or build the whole thing chord by chord.

Switch to the Harmonize melody tab, then draw a melody on the grid or import a MIDI or MusicXML file. Mediant writes a chord progression underneath it, which you can then edit like any other.

Above the melody grid, Draw mode lets you tap to add notes and drag to change a note’s pitch or length; tap a note to delete it. Switch to Scroll to pan across a longer melody without editing. Use −／＋／Fit to zoom.

Spread (producer-friendly pads) by default, plus Close, Open, and Drop-2 — each with smooth voice-leading between chords. Change the voicing at any time from the Voicing menu.

No. Mediant is fully offline and requires no sign-in. It collects no data.

Tap Export — MIDI for a DAW, MusicXML for notation software (it exports as a .xml file with chord symbols) — and choose a destination from the share sheet.

Make sure you’re opening the exported file with an app that reads standard MIDI or MusicXML. If a specific app rejects a file, email us the details at support@songdeed.com and we’ll take a look.