Level 3 · Registration and bellows shaping

the treble/bass register switches, dynamics and accents through the bellows, minor and seventh chords

Two expressive systems now combine: the bellows colour the dynamics while the registers colour the timbre — the accordion’s version of organ registration.

What you learn

• Treble register switches (the chin and palette ‘couplers’) change which reed banks sound — clarinet (single 8’), bassoon (low 8’), and the full ‘master’ — much like organ stops.
• Dynamics come from the bellows, not the keys: shape a crescendo and diminuendo by speeding and easing the bellows on a held chord.
• Accent a note with a small, sharp bellows impulse (the first step toward the bellows shake).
• Add the minor and dominant-7th chord rows to the left hand; play a I–vi–IV–V turnaround.
• Keep the treble legato while the left hand articulates the bass–chord pattern underneath.

Grounded in: established piano-accordion method tradition (Deiro, Galla-Rini, Magnante schools, 1930s–40s) — for the graded right-hand keyboard → Stradella bass → bellows-artistry progression.

Note: a method-grounded technique curriculum (no score corpus for this instrument); levels are graded skills, not pieces.