This Ableton tutorial walks through Scale Mode in Live 12's MIDI editor, showing how to enable it on a clip, fold the piano roll to display only in-scale notes, and toggle between sharp, flat, and MIDI note number views. When Scale Mode is active, the interval control switches from semitones to scale degrees, letting you stack scale-aware chords across single notes with the Add Interval function.
Scale settings in Live 12 are per-clip, not global. Switching between clips shows how each one holds its own scale state, and how the scale control bar and the clip's scale selector stay in sync with each other.
The bit closes with a practical fix: two clips are selected together, assigned to D minor, and a bass line that's drifted out of key is snapped back into shape with Fit to Scale in a single click. It's a clean demonstration of how scale awareness becomes a corrective tool, not just a compositional aid.