where did the 'o' go?

where did the 'o' go? a song by Óscar Graça on Archodia Music

...pleno (parábolas cristalinas e caminhos de golfinhos) by Óscar Graça ,
o som da intranquilidade by Óscar Graça ,
where did the 'o' go? by Óscar Graça ,
glimmery morning by Óscar Graça ,
velox pondera by Óscar Graça ,
ending story ii by Óscar Graça ,
ferreus locus by Óscar Graça ,
elipse perpétua by Óscar Graça ,
interface (ou o inferno de gropius) by Óscar Graça ,