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 (or slightly radiused) tops and backs. The Irish bouzouki has also become integrated into some other western European musical traditions over the past forty years. Popularly used in the music of Asturias, Galicia, Brittany, Spain, and even the Scandinavian countries (in fact, there is even now a new Nordic branch of the instrument, having been modified further to suit the unique requirements of those musics). The instrument's role is usually a combination of interwoven accompaniment (usually a mix of open-string drones, two note intervals, bass lines and countermelody) and melodic play. Instrumental arrangements by musicians such as Ale Möller from