Guitar phím lõm

The đàn lục huyền cầm (chữ Hán: 彈六絃琴) (literally "lute with six strings"), or colloquially đàn ghi-ta phím lõm (literally ghi-ta "guitar", + phím "fret", + lõm "sunken"), is a scalloped Vietnamese adaptation of the French guitar.

However, in order to adapt a western guitar to the deep pressing on the strings necessary for Vietnamese music the fingerboard - the wood of the neck between the frets - was scooped out to ease the pressing.

This carving out of the fingerboard is what gives the distinctive scalloped appearance to the six-string đàn lục huyền cầm.

[1][2] This form of guitar is commonly used in cải lương or "Southern Reformed Theater.

Some guitarists will use artificial harmonics in order to imitate the sound of the Đàn bầu.