| 摘要 |
A visual interface or guide device of variable thickness for a fretted, stringed musical instrument. The device comprises 1-5 interconnected fret bands which can be temporarily attached between the neck and the strings of the instrument. Adjacent guide strips have a variable width opening between them that receives a fret. The device is made of silicone rubber and is movable along the guitar neck due to its ability to expand and contract and thereby accommodate logarithmic positioning of frets along the fret board. Each fret band carries a number of colour indicators that direct the user to the correct fretting position.
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