On Thursday evening at the Rialto Center for the Arts, Georgia State University’s neoPhonia New Music Ensemble presented tête–à–tête (literally “head-to-head” but more meaningfully “private conversation”) as one of the cultural offerings of France-Atlanta 2017. The program was a mixed bag of 20th- and 21st-century solo and chamber works that included a pair of commissioned world premieres, one by French composer Philippe Hurel and one by American Atlanta-based composer Nickitas Demos, who is also neoPhonia’s artistic director.