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.