oboe

A soprano and melody wind instrument in the modern orchestra and wind ensemble. It is a smaller instrument and generally made of grenadilla wood. It is a member of the double reed family.

Whistles, mirlitons, flutes, trumpets or horns, clarinets, and oboes are all played in one or more parts of the continent.

This does become monstrously antimusical in one scene: when Tchaikovsky’s music, softly depicting the sleeping palace (my favorite passage of this composer’s entire oeuvre, with its beautifully muffled oboe melody suggesting how beauty ripens in sleep like a chrysalis), is turned into an epic battle for the poor passive Prince, conducted between the wicked Carabosse, with her ghoulish minions, and the Lilac Fairy, with her elves.

radiotelephony clear-code word for the letter O.

Initialism of off-by-one error.