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
Cretan lyra plates was reported in 2006. The old model of the Cretan lyra (also called "lyraki" ~ small lyra), is tuned 5-1-4. That is, the middle string is the lowest in pitch and the others are a 4th and a 5th above it. The performer plays the melody on the 1st and 3rd string, using the 2nd string as a drone (Magrini 1997), similarly to the Byzantine lyras from ca. 1190 AD, found in the excavations of Novgorod (Anthony Baines, 1992). The contemporary lyra modelled after Stagakis' design is tuned in fifths to (d-a-e'), and like the violin, it uses no