Hitofushi: from hummed melody to score

Field notes

The workflow includes practical recording guidance: use a click track through headphones, avoid chords and sustained open strings, and place a phone roughly 20–30 cm from a guitar near the 12th fret. The editor calls out octave errors from string-instrument harmonics and provides one-octave correction controls. The site says processing happens on the device; it also cautions that browser or device noise reduction can interfere with instrument recordings.