CAGE began as a loose collective of musicians surrounding Cornell University in 2009, including faculty, students, and community members interested in improvisation and experimentation with sound. Feeney and other founding members Kevin Ernste, Chris Miller, and Annie Lewandowski have collaborated with improvisers and experimental musicians from around the world, including Peni Candrarini, Ellen Fullman, Jessika Kenney, Eyvind Kang, and Theresa Wong.
The group's most recent collaboration is a recording documenting the sound sculptures of Harry Bertoia, released on Weighter Records as WR07 in January 2019.