"Telemann more or less invented the quartet, with two lead instruments, accompaniment, and a bass line. Here it is flute, violin, keyboard, and cello. Haydn adapted it to the string quartet, and it's used in folk, jazz, and rock."
"The cantatas are the heart of Bach's music. The recordings by The American Bach Soloists, Joshua Rifkin, and John Eliot Gardiner with one voice per part or small choir let you hear all of the music. The American Bach Soloists recordings are available on their own web site."