The Triolin is an acoustic bowed metal instrument designed and built by Hal Rammel in 1991.
[citation needed] Thin metal rods sit perpendicular in a circular arrangement on the top surface of a triangular wooden resonator and the instrument is held in the other hand by an ornately carved chair leg attached to the bottom of the resonator.
Several years later, when he began to experiment with amplification inspired by the live electronics of cellist Russell Thorne and the amplified table top arrays of Hugh Davies, he attached wooden rods to a flat wooden artist's palette.
His amplified palette can be heard on the 1994 CD Elsewheres (Penumbra Music) and, more recently, on "Like Water, Tightly Wound" (a Crouton Records 10").
In 2013 the triolin and four amplified palettes by Hal Rammel were added to the permanent collection of the National Music Museum in Vermillion, South Dakota along with many other acoustic instruments he performed with in the 1990s in Chicago.