GuitarAMI and GuiaRT: two independent yet complementary projects on augmented nylon guitars

This paper describes two augmented nylon-string guitar projects developed in different institutions. GuitarAMI uses sensors to modify the classical guitars constraints while GuiaRT uses digital signal processing to create virtual guitarists that interact with the performer in real-time. After a bibliographic review of Augmented Musical Instruments (AMIs) based on guitars, we present the details of the two projects and compare them using an adapted dimensional space representation. Highlighting the complementarity and cross-influences between the projects, we propose avenues for future collaborative work.