You must first secure their written permission, or the heirs of the composer if h/she is dead.
Libretto
Christopher
Christoph Williblad Gluck
The 'libretto' which is the story especially prepared for the composer to set to music.
christoph willibald gluck
christoph willibald gluck
When the composer of an opera about a swashbuckling, wenching highwayman meets his hero's real life counterpart he's disappointed with his lack of dash(Heroic, Charming, Exciting) Laurence Olivier..Captain MacHeath
Composer - Randy Newman .
Like most things in music and opera it evolved rather than being able to be tied down to a specific. What you speak about is known as 'Opera Semiseria' and has a serious story but with a happy ending - so is defined as a combination of the elements of both comic and serious opera. An example of this is 'The Thieving Magpie' by Gioachino Rossini
an opera ballet is an opera that incorporates ballet dancing in part to tell the story of the opera
an Opera Ballet is an opera that incorporates ballet dancing in part to tell the story of the opera
The 'libretto' is the words or story of the opera.