The San Antonio Symphony launched its 2016-17 season Friday night with a spectacle – employing massive extra musical forces and combining ancient poetry with universal harmonic ideas in a package simply called Carmina Burana. The Carl Orff piece, premiered in 1937, required an enlarged San Antonio Symphony, the San Antonio Mastersingers, the Children’s Chorus of San Antonio and three first-rate solo singers. Together they numbered 268. A near-capacity audience of more than 1,600 people took it all in at the Tobin Center for the Performing Arts. The person pulling together all the numerous forces was Music Director Lang-Lessing, who used pauses and exaggerations to shape his vision for an inspired performance. The Mastersingers, as usual, were powerful and perfect, their diction crisp and clear. The Children’s Chorus sounded angelic, as if they were singing in a cathedral. All three soloists were flawless in their roles.