Mandolin are used. Usually, courses of 2 adjacent strings are tuned in unison. By far the most common tuning is the same as violin tuning, in scientific pitch notation G–D–A–E, or in Helmholtz pitch notation: g–d′–a′–e″. Note that the numbers of Hz shown above assume a 440 Hz A, standard in most parts of the western world. Some players use an A up to 10 Hz above or below a 440, mainly outside the United States. Other tunings exist, including "cross-tunings", in which the usually doubled string runs are tuned to different pitches. Additionally, guitarists may sometimes tune a mandolin to
String Quartets (Ligeti) work, like the first string quartet, but was also considered to be in six or three movements, with the three lasting about 12' + 3' + 6' minutes in total. The piece would be dedicated to the Arditti Quartet, entirely microtonal, inspired by the hyperchromaticism of Gesualdo, and inspired by melodic ideas from Burma, Uganda, Zimbabwe, Java, Bali, and Cameroon. It's also suggested that the entire quartet would be tuned in scordaturas based on harmonic partials, akin to the violin and viola in Ligeti's Violin Concerto. The fourth quartet would be dedicated to the Kronos Quartet, and be inspired by