She worked with
Bernard Baschet and his Structures Sonores in 1970, and served residencies in electronic music with
Dartmouth College in 1976 and in 1998. In 2015 Ferreyra toured and released an album with Christine Groult,
Nahash, on trAce label. The work was commissioned by former of INA-GRM artistic director Christian Zanesi in 2011. The live recording features Ferreyra using "four Revox tape recorders, augmented with an analog matrix and a synchronizer box with self-designed variable speed drives." == Live performance and recordings in the 21st century ==