This music compendium, itself a part of Oxford music online, includes the New Grove dictionary of music and musicians, the New Grove dictionary of opera, and the New Grove dictionary of jazz.
Containing over 2,500 operatic characters, this guide gives plot synopses for over 250 operas and operettas, and details full information on each operatic role, including its creator and notable performers.
"Met Opera on Demand delivers instant access to more than 60 past performances from the Met’s award-winning Live in HD series, as well as more than 350 classic full-length video and audio performances."