Don Hall is American.
'' '' , K. 612 , is a concert aria by Wolfgang Amadeus Mozart , composed in Vienna .. concert aria. concert aria. Wolfgang Amadeus Mozart. Wolfgang Amadeus Mozart. It is dated 8 March 1791 on Mozart 's own catalogue .. Sung by a solo bass with an obbligato double bass .. bass. Bass ( voice type ). obbligato. obbligato. double bass. double bass. It is well known by players of the double bass , with difficult scale work and double stops .. bass. Bass ( voice type ). double bass. double bass. It may have been composed as an interlude in a performance of an opera buffa , written by another composer .. opera buffa. opera buffa. The aria remains a popular and often performed concert piece today .