The New Grove Dictionary of Music and Musicians, second edition, edited by Stanley Sadie and John Tyrell, was published simultaneously in print and online as Grove Music Online in January 2001. Grove Music Online began to develop independently immediately; regular revisions and additions to the content began in Spring of 2001 and continue today through an ambitious editorial programme. In addition to the regular programme of revisions and new articles, Grove Music Online has grown to include The New Grove Dictionary of Opera (published in print in 1992 and online in 1999) and The New Grove Dictionary of Jazz, second edition (2001). Through a partnership with Sibelius notation software, over 500 of Grove's musical examples are now available in sound as well as notated examples.   More detail...