1. Eluvium - Dusk Tempi
2. Mary Lattimore - Silver Secrets
3. Jefre Cantu-Ledesma - Night Swimming
4. Machinefabriek - Kelelawar
5. Kelly Moran - Sodalis
6. Taylor Deupree - Echo Affinity
7. Noveller - A Place Both Wonderful and Strange
8. Christina Vantzou - Music for a room with vaulted ceiling
9. Sarah Davachi - Marion
10. Felicia Atkinson - Night vision, it touched my neck
11. JAB - Indiana Blindfold
12. Chihei Hatakeyama - The Circle
13. Ben Lukas Boysen - Torpor
14. Stuart Hyatt, Player Piano, Julien Marchal - Between the Hawthorn and Extinction

lp/2cd/dl on Temporary Residence, May 2020

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Stuart Hyatt returns with another sonic wonder in the Field Works series, bringing the listener into truly uncharted acoustic territory. Ultrasonic is perhaps the first-ever album to use the echolocations of bats as compositional source material. For this special album, Hyatt has assembled an extraordinary group of contributors: Eluvium, Christina Vantzou, Sarah Davachi, Ben Lukas Boysen, Machinefabriek, Mary Lattimore, Felicia Atkinson, Noveller, Chihei Hatakeyama, John Also Bennett, Kelly Moran, Taylor Deupree, Jefre Cantu-Ledesma, Julien Marchal, and Player Piano. Ultrasonic is part of a broader storytelling project about the federally endangered Indiana bat. Generously funded by the IUPUI Arts & Humanities Institute and the National Geographic Society, each album contains an official printed booklet of The Endangered Species Act of 1973.