AdaOgg is a complete interface layer that brings the Ogg, Vorbis, and Theora libraries to the Ada 2012 programming language.
It is a very lightweight, thin interface that provides useful Ada-style naming and overloads for the complete Ogg suite.
AdaOgg is under continuous development and is being used for real projects here at Phaser Cat Games. It is licensed under the LGPL 3 and is available as a free download.
Note that the VorbisFile API is not included, and there are currently no plans to support it.