Australian Brandenburg Orchestra east coast cities of Brisbane and Melbourne. The Orchestra’s name pays tribute to the Brandenburg Concertos of J.S. Bach, whose musical genius was central to the Baroque era, as Paul Dyer is today. The concerts include both the music of well-known composers such as Mozart, Vivaldi and Handel, as well as lesser-known composers, rare works and unusual replica instruments. The musicians always play from original edition scores on replica instruments of the 18th century. The group has performed with guest artists such as Andreas Scholl, Emma Kirkby, Derek Lee Ragin, Andrew Manze, Philippe Jaroussky, Avi Avital, Dmitry Sinkovsky, , Christina
Organ concertos, Op. 4 (Handel) however, has favoured the original intimate scoring for chamber organ and small baroque orchestra. In the 1940s the blind organist Helmut Walcha prepared a version for organ and second keyboard giving one possible ornamentation and extemporisitation of the organ part in the slow movements. Modern performing editions of Walsh's 1738 solo keyboard version and the original scoring for organ and orchestra have been prepared by the musicologists William Gudger and Terence Best. Organ concertos, Op. 4 (Handel) The Handel organ concertos Op 4, HWV 289–294, are six organ concertos for chamber organ and orchestra composed by George Frideric Handel in