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Although research in Speech Sciences has greatly developed in recent years, the applications of this research has had difficulties in reaching the language classroom. Limited training of the teachers in Phonetics as well as a restricted dialogue between speech researchers and language teachers explain in part a lack of innovation in technological tools and pedagogic practices. The result of the collaboration between a phonetician/computer engineer/researcher and a phonetician/teaching methodologies theorist/teacher, WinPitch LTL is a real time speech analyzer, visualizer and synthesizer. Building on the research in speech visualization and the importance of feedback in the acquisition of phonological and prosodic systems in a second language, this authoring software aims to facilitate and accelerate the process of auditory discrimination essential at the beginning of all language learning. But, of more significance than a simple visualizer, this software develops in the learner an awareness of the process of his/her learning; the multiple functions of observation, visual/auditory comparison, segmentation, signal editing, and the ability to redesign the intonation curve or the duration of a segment using synthesis, favour the development of a reflective, progressive and autonomous learning style. Furthermore, and in contrast to automatic speech recognition programs, the originality of WinPitch LTL lies in the precision and quality of the teacher's feedback to the learner's oral productions, allowing the latter to critically examine his/her oral production at any time. Finally, an individualized approach is reinforced by the software's numerous possibilities of (self) evaluative dialogue between the learner and the teacher, either in a synchronous relationship in the classroom or asynchronously in a distance learning setting.