The developed tool provides utilities for prosody analysis and labeling of voice signals. It works under Windows 95 and Windows NT environments and uses the Microsoft Win32 application programming interface (API) for audio playing and recording. The application detects the prosody of speech signal and then the original intonation can be stylized in order to observe the pitch contour. Besides, the original intonation can be easily modified and it is possible to resynthesize the voice signal according to the new intonation. Listening to the resynthesized signal, the user can evaluate the results of the prosodic modification. 1 Introduction This application aspires to be a helpful tool for prosody analysis and database labeling in the context of the development of the Text-to-Speech (TTS) system that is being developed at the Universitat Politcnica de Catalunya (UPC) [1][2]. The UPC-TTS system is a bilingual system able to read text in Spanish and Catalan that works using concate...