The next Fretworks broadcast Saturday evening at 7 on Classical 101 will feature guitar, lute and mandolins. Â The Modern Mandolin Quartet will start the hour with the finale from Antonin Dvorak's American Quartet, the String Quartet No. 12 in F in an arrangement for four mandolins from their CD, "Americana." The early 19th century guitarist composer Fernando Sor must really have liked the music from Mozart's opera The Magic Flute. Â He wrote a famous set of variations on a theme by Mozart from the opera, the Op.9, then he revisited this rich mine of wonderful tunes in his Op. 19, Six Airs From Mozart's "The Magic Flute." Â We'll hear Manuel Barrueco perform them. Norbert Kraft will be the guitarist for an interesting arrangement of the Valses Poeticos of Spanish composer Enrique Granados. Â We'll hear Peter Breiner's version for guitar and orchestra. Â Music from the time of William Shakespeare will be played by lutenist Nigel North, who will perform a pavan and galliard by John Dowland. To round out the hour, I'll have music for violin and guitar from Niccolo Paganini, his Sonata Concertata in A with violinist Scott St. John and guitarist Simon Wynberg. Â Everyone knows Paganini as the great violin virtuoso, but he also loved playing the guitar and wrote a number of works for the instrument.