Viola da braccio
Viola da braccio (from Italian "arm viola", plural "viole da braccio") is a term variously applied during the baroque period to instruments of the violin family, in distinction to the viola da gamba ("leg viola") and the viol family to which the latter belongs. At first ""da braccio"" seems to encompass the entire violin family. Monteverdi's "Orfeo" (printed 1609) designates an entire six-part string section ""viole da brazzo"", apparently including bass instruments held between the knees like the cello and bass violin. His "Selva morale" (1641) contains a piece calling for ""due violini & 3 viole  da brazzo ouero 3 Tronboni"" (2 violins & 3 viole da braccio or trombones), reflecting a general shift in meaning towards the lower instruments. Eventually it came to be reserved for the alto member, the viola. A famous example is Bach's Sixth Brandenburg Concerto (1721), combining two viole da braccio with two viole da gamba. The German word for viola, "Bratsche", is a relic of this last use. Differences with viola de gamba. The families of the "viola da braccio" and the "viola da gamba" differ in size and form, the string tuning ("viola da braccio" in fifth tuning – "viola  da gamba" in fourth tuning) as well as in the posture ("viola da braccio" = arm position, exception: "bass-viola da braccio" – "viola da gamba" = knee position) as well as in the bow position ("viola da braccio" = overbow grip – "viola da gamba" = underbow grip). History and development. Over the centuries in the history of the violin and viola da gamba families, there has been a constant development to the present form of the modern instruments known to us as violin/violin, viola/viola and violoncello. The double bass, however, has developed from both the violone and the  bass-viola da gamba. The first instruments of the "viola da braccio" family were built in Italy from about 1530. After the early form with three strings, the four-stringed instrument developed into one without string frets with a tuning in fifth. In this family the instruments of different sizes and tunings are called soprano, alto, tenor and bass "viola da braccio". The alto instrument in the tuning is comparable to today's viola. The tenor viola was tuned in the 16th century first to and later lower to like the alto viola. The soprano viola with its tuning on  corresponds to today's violin. The bass instrument with the tuning on then developed in the further course more and more to today's violoncello with the string tuning </ref>