Six-System Finger-Frame Rotation Jianpu (Numbered) Notation

Tune both strings before the first stroke — everything in Six-System Finger-Frame Rotation sits in first position on the inner D and outer A string, so the two open pitches carry the whole piece. The numbers are jianpu: 1 is the home note, dots mark the octave, and a line under a digit halves it. Play one full bow per note at first, slow and even, and let the app's pitch feedback tell you where a finger sits sharp or flat — with no fingerboard and no frets, the sound is the only witness.

Keep the metronome well under around 64 BPM, keep bow changes quiet, and loop the phrase that grades worst until the left hand stops guessing — with no frets, repetition is how the hand learns distance. By the numbers, this setting runs 16 notes across 4 bars, from D4 up to D5 in 4/4 time.