The Objective
The keyboard begins with a Pentatonic Scale (5 notes). Your task is to identify the wide "minor-third" gaps and fill them with extra white keys to complete the full Diatonic Scale (7 notes).
The Starting Point: Pentatonic
The scale is Anhemitonic, meaning it has "no half steps." It is composed entirely of:
- 3 Whole Steps (200 cents)
- 2 Minor Thirds (300 cents)
"From antiquity to the present, this scale has been fundamental to musical cultures worldwide."
Interval Composition
Pentatonic Structure per Octave
How to Play
1. Listen for Gaps
Play freely. Identify the "wide" Minor Third intervals.
2. Drag & Drop
Drag an extra white key from the left. Slide it in from the top.
3. Complete
Keys part. The gap fills. You now have a Diatonic Scale.
Scale Density Growth
Notes per Octave: Pentatonic vs. Diatonic
The Theory Behind It
Universal Appeal
The pentatonic scale lacks half-steps, avoiding strong dissonance. This makes it naturally melodic and easy to play without "wrong notes."
Construction Site
HardHatPiano treats music theory as a building project. You aren't just memorizing scales; you are building them by filling in the structural gaps.