12 Latin Songs. Arranged by Johnny Largo himself, but lots of arrangements were also done by Mike LeDoux and Chic Parnell. These arrangements differ from typical chord organ arrangements in that they make specific use of the Optigan's light metronome by coding the music with a measuring system developed by Johnny Largo called the "Automatic Beat Counter." Johnny sez that this system is still in use today in EZ-play sheet music editions, long after the demise of Optigan. Book in fair to good condition no torn pages and no writing.