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The Progression Panel

MIDI MakerDOCS06/07/26

The MIDI Maker timeline arranger — key segments, chord segments, instrument clips, and how to arrange your track.

Overview

The Progression panel is the timeline arranger at the bottom of the studio. It shows the full arrangement as a horizontal, scrollable grid: bar numbers across the top, then one row per lane — key segments, chord segments, and one clip row per instrument.

Zoom in or out using Ctrl + scroll wheel (Cmd on Mac), or the ± buttons at the left edge of the panel. The grid always snaps to 1-beat resolution.

Seeking from the Ruler

Click anywhere on the bar/beat ruler at the very top of the grid to jump the playhead to that position. This works whether the track is playing or paused.

Key Segments

The key lane is the top row of the arranger. Each segment defines the root note and scale for a section of the track — E minor, D major, and so on. All instruments in that section play within the same harmonic context.

Click a segment to open its popover, where you can change the root note, scale type, and segment length. Drag the right edge of a segment to resize it — the adjacent segment extends or contracts to keep the lanes contiguous. Lengthening or shortening a key segment ripples into the chord and clip lanes below.

Chord Segments

The chord lane sits directly below the key lane. Each segment selects a chord pattern — the harmonic sequence the instruments play within that portion of the track.

Click a segment to open its popover and choose a different chord pattern, or adjust the segment length. Chord segments are independent of key segments and can be any length.

Instrument Clips

Below the chord lane, each instrument has its own clip row. A clip defines the window of time in which that instrument plays — gaps between clips are silence.

  • Create — double-click an empty space in a clip row to create a new clip at that position.
  • Move — drag a clip to reposition it. Movement snaps to 1-beat increments.
  • Resize — drag either edge of a clip to change its length. A clip cannot overlap another in the same row; the editor clamps automatically.
  • Edit — click a clip to open its popover and adjust internal controls (rhythm chance, tone group selection, and similar settings).
  • Delete — select a clip and press the Delete key to remove it.
  • Commit to notes — in the clip popover, freeze the clip's generative output into real, editable notes (Pro).

Rhythms stay phase-locked to the global bar grid — a clip is a gate that lets an instrument play, not a phase shift. Moving a clip changes when the instrument plays, not how its rhythm lines up to the bars.

Committing a Clip to Notes

Generative clips roll fresh variations every playthrough. When you hear a take you want to keep, click the clip and choose Commit to notes: the exact notes you last heard in that clip are frozen onto it and open in a piano-roll editor. If the clip hasn't played yet this session, a fresh take is generated for you.

  • Edit — drag to draw notes, drag a note to move it, drag its edges to resize, double-click (or press Delete) to remove. Drum clips use the same grid with one row per drum.
  • Exact playback — a committed clip plays precisely what you see. It ignores rhythm and tone variations, evolution and section energy, and exports to MIDI note-for-note.
  • Revert — the clip keeps its original rhythm and tone settings, so Revert to generative restores the slot-machine behaviour losslessly.

The note editor is the same piano roll used by the motif creator — committed clips simply edit absolute notes instead of a reusable motif.