Among variant forms of the guitar are the 12-stringed, or double-course, guitar, and the Mexican jarana and the South American charango, both small five-course guitars. Lyre-shaped guitars were fashionable in 19th-century drawing rooms. Other forms of the guitar include the metal-strung guitar played with a plectrum in folk and popular music; the cello guitar, with a violin-type bridge and tailpiece; the Hawaiian, or steel, guitar, in which the strings are stopped by the pressure of a metal bar, producing a sweet, gliding tone; and the electric guitar, in which the instrument’s sound and tone depend almost entirely on the electronic detection and amplification of its vibrating strings.