Bouzouki manner of a Neapolitan mandolins so as to increase the strength of the body to withstand thicker steel strings. The type of the instrument used in Rembetika music was a three-stringed instrument, but in the 1950s a four-string variety by Manolis Chiotis was introduced. From a construction point of view, the bouzouki can have differences not only in the number of strings but also in other features, e.g. neck length, width, height, depth of the bowl or main body, the width of the staves (the wooden gores or slices of the bowl) etc. These differences are determined by the manufacturer,
Irish bouzouki is closer to the D3A3D4 tuning of the Greek trichordo bouzouki than is the guitar-like tuning C3F3A3D4 used on the modern Greek tetrachordo, and is particularly well suited to a modal harmonic approach to accompaniment as used in Irish traditional music. Alec Finn, playing a Greek trichordo bouzouki, uses the traditional D3A3D4 tuning with the octave pair on the low D course changed to unison. Amongst many luthiers and musicians the Irish bouzouki is considered to be part of the mandolin family, but for others this new family of instruments is a separate development. In actuality, the mandolin and lute