These CDs contain all Bach’s extant concertos that feature a solo keyboard. Most were written in the 1730s and are thought to be arrangements of earlier concertos, many of which are now lost (though two will be recognized as Bach’s E major and A minor violin concertos and the sixth is an arrangement of the fourth Brandenburg). The fifth Brandenburg Concerto, with harpsichord, flute and violin soloists, dates from 1721 and is generally regarded as the first concerto for a solo keyboard instrument ever written. Bach made the keyboard part particularly brilliant and included a huge cadenza; he certainly knew how to establish a genre with a bang!