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
Baroque violin and is also well-suited for the orchestra. It can be fitted with a viola E string and tuned to GDAE and played in the same way as a violin. There were other German violin makers of the same period as Johann Heinl who continued to produce old German baroque instruments for the musician who especially wanted a traditional German violin. One interesting type of old German pattern made by Grunwald has the body similar in size to the modern violin but with the fingerboard an inch and a half longer than today's standard. This change in fingerboard length allowing for