A Major — Cello

A Major is 7 notes to the octave (common family), drawn here along the Cello's CGDA strings with every A named, so home is findable from any finger.

Bright, resolved, and stable. The foundation of Western tonal music and the most common mode in pop, classical, folk, and jazz.

Heard in: Pop, classical, country, folk, gospel — the default major tonality of Western music.

Because the strings climb in fifths, one hand position covers a wide span of the fingerboard — four fingers, a fifth of range per string, and the same finger pattern repeating across every neighbouring pair. Learning a scale here is mostly learning WHICH position it wants and where the shifts fall.

Open-string drones: 2 of the Cello's 4 open strings belong to A Major — the D string (the fourth) and the A string (the tonic) — so they can ring beneath the line as a fixed reference.

The A string is a chord tone of the A tonic triad, so it stays consonant against every degree of the scale.

The C string and the G string sit outside A Major: stop them rather than let them sound through the phrase.

Play it slowly with a long bow, one note to a stroke, and listen for the notes that pull sharp or flat against the open C and A. Intonation on this instrument is a conversation with the open strings — nothing on the fingerboard decides it for you.