This work is part of a broader study of the work Lagrime di San Pietro by Orlando di Lasso and brings the proposal for a viable execution of the piece with mixed choir a cappella. Will be treated most relevant aspects of the work such as his compositional characteristics, vocal types that was intended and performing group, approaching the practice of that era and drawing a parallel with the existing resources in our day. After discussing these aspects, this study suggests a performance consistent with the ideal of the composer and adapted to current parameters.111121133Atlas, A.W., (1998) Renaissance Music: Music in Western Europe, 1400-1600, , New York: LondonBarbier, P., (1993) História Dos Castratti, , Rio de Janeiro: Editora Nova FronteiraBartel, D., (1997) Musica Poetica: Musical Rhetorical Figures in German Baroque Music, , EUA: University of Nebraska PressBrown, H.M., Stein, L.K., (1999) Music in the Renaissance, , 2 nd. Ed. New Jersey: Prentice HallGarretson, R.L., (1993) Choral Music: History, Style, and Performance Practice, , Upper Saddle River: Prentice HallLuoma, R., (1989) Music, Mode, and Words in Orlando di Lasso's Last Works - Studies in the History and Interpretation of Music, , Edwin Mellen PressPlank, S.E., (2004) Choral Performance: A Guide to Historical Practice, , Lanham: Scarecrow Press IncReese, G., (1954) Music in the Renaissance, 41 (3). , New York: W. W. Norton and Co. IncHaar, J., The Early Madrigals of Lassus (1985) Revue Belge de Musicologie, 39-40, pp. 17-32. , Bélgica