Electronic musical instrument was designed to be a lower-cost alternative to a pipe organ for church music, musicians soon discovered that the Hammond was an excellent instrument for blues and jazz; indeed, an entire genre of music developed built around this instrument, known as the organ trio (typically Hammond organ, drums, and a third instrument, either saxophone or guitar). The first commercially manufactured synthesizer was the Novachord, built by the Hammond Organ Company from 1938 to 1942, which offered 72-note polyphony using 12 oscillators driving monostable-based divide-down circuits, basic envelope control and resonant low-pass filters. The instrument featured 163 vacuum tubes and weighed
Tomáš Krupa included a win over second seeds David Adams and John-Laffnie de Jager. He won a total of four titles on the Challenger circuit. As a coach he is most famous for his involvement with Tomáš Berdych, who he coached from 2009 to 2014, during which time he made the final of Wimbledon. Prior to this he worked with Radek Štěpánek. More recently he has been the coach of Jiří Veselý and Barbora Strýcová. Tomáš Krupa Tomáš Krupa (born 14 November 1972) is a former professional tennis player and now coach from the Czech Republic. Krupa was a doubles specialist, most