The COST 258 Action with the title “The Naturalness of Synthetic Speech” is concerned with the coordination of basic research of 34 laboratories dealing with text-to-speech synthesis in 17 European countries.COST Action 258 proposes a range of studies that address the core issues of naturalness in synthetic speech in concrete applications. Our contribution addresses prosodic models for the German language, SRELP based demisyllable synthesis using VieCToS, and nonlinear oscillator models for signal generation. not assigned GG: not assigned KP: 34 European laboratories (see COST258 homepage)