Paul Dresher & Joel Davel
dresher on quadrachord, davel on marimba lumina.
i really loved the quadrachord. in dresher's words: "The instrument has a total string length of 160 inches (though smaller versions have been built), four strings of differing gauges but of equal length and an electric-bass pickup next to each of the two bridges. It can be plucked like a guitar, bowed like cello, played like a slide guitar, prepared like a piano, and hammered on like a percussion instrument."