Every note has a number
Once a scale is built, every note in it gets a number: 1 through 7, counted from the bottom. Degree 1, do, the tonic, is home base. Numbers matter more than letters here, because they survive a key change: mi is the third rung whether home is C or G♭.
The ladder, numbered
C major, rung by rung, octave included. Pick any home note and the ladder rebuilds around it. Shapes mark three rungs: 1 wears the star, 3 the triangle, 5 the pentagon.
Every rung has a name tag
VocabularyLetters are absolute: C4 is always the same pitch, in any key. Numbers, solfège, and titles are relative: the 1 has a different pitch in different keys. Below are the names for the notes in C major based on the key chosen above. Tap a row to hear the 1, then that degree.
Do is home
Climb the ladder and stop on 7, and your ear leans hard toward the top. Land on do and the sentence ends. That pull toward home is what the numbers measure. Both runs climb C major, the key you picked above.
Quiz
1 / 5Degree 1 of a scale is called…