Mitch Friedfeld asks: >What was the first string quartet? This is not an easy question to answer. In the abstract, a string quartet is simply a piece of music for four stringed instruments, and there were pieces in this category from the Baroque era. However, when we talk in practical terms about string quartets, we refer to works possessing the "sonata allegro form" that was developed by Franz Joseph Haydn and using two violins, viola, and cello. Therefore, the string quartet is considered an invention of the Classical Era with Haydn as its daddy. So the string quartet as we know it was not known to Bach or Handel, etc. The Art of Fugue is usually played on a solo keyboard instrument but has been arranged for string quartet, chamber ensemble with woodwinds and brass, orchestra, and even a group of recorders. Bach was not exacting as to the instrumentation to be used for the work; hence, any combination of instruments can be justified by the performers. Don Satz [log in to unmask]