The objectives of this project are: 1) Create and validate two online software for the development and evaluation of intonation skills, the first for singing voice (Cantus) and the second for continuous or variable intonation instruments (Plectrum). The instruments addressed with the program are brass (trumpet, horn and trombone) and string (viola, violin and cello), taking into account the adequacy of the evaluated prototype to the gender differences identified in the research literature (genres female and male models of exercises or vocal samples, interface design, learning process model -more relational) and non-sexist language 2) Generate pedagogical knowledge regarding intonation teaching-learning processes in music education institutions, facilitating teaching work in the training and evaluation of this ability.