The instrument has the same shape and the same six strings as the traditional guitar, but it sounds very different.

VOA: special.2010.05.12

All of the sounds are produced by the strings on the instrument and how the bow is pulled across the instrument.

所有声音都是靠乐器上的弦产生的,琴弓在乐器上来回滑动发声

耶鲁公开课 - 聆听音乐课程节选

On an acoustic guitar, the strings vibrate and the hollow part of the instrument, or the sound box,also vibrates.

VOA: special.2009.09.27

So he invariably asked to have a second piano onstage, because midway through a recital Liszt's powerful playing would result in broken strings and an instrument that was hopelessly out of tune and quite unplayable.

WSJ: When Two Makes Perfect | By Byron Janis

He's added several strings to create a seven-string instrument, and has created the first all-ngoni group, featuring four different-sized instruments, including a bass ngoni, also his invention.

NPR: Bassekou Kouyate And Ngoni Ba: Griot Music

Given the varying width of real guitar strings, it's much easier to tell what frets we're pressing (and which strings we're finger-picking) on a real instrument without having to look down.

ENGADGET: Rock Band 3 Fender Mustang Pro guitar review