OBJECTIVE: Sort musical notes from lowest to highest pitch.

HOW TO PLAY:

1. Click bars to hear their frequency (Chromatic Scale, Octaves 3-6)

2. Drag bars into the sort zone

3. Arrange from lowest pitch (left) to highest (right)

4. Click "Check Order" when ready

DIFFICULTY: More notes and closer intervals as you level up!

• Levels 1-3: 5 notes, wide gaps (EASY)

• Levels 4-6: 6 notes, medium gaps (MEDIUM)

• Levels 7-9: 7 notes, close gaps (HARD)

• Levels 10+: 8 notes, very close (EXPERT)

Every 3 levels, you'll see a brief ad break.