"Recycled Sounds." Imagine passing through the parking garage under Austin City Hall and finding a curious tangle of plastic tubes, metal pipes, drumsticks, plastic buckets — all playable music instruments, free for anyone to explore.

As part of the Fusebox Festival, Austin composer Steve Parker stages "Recycled Sounds," a project that creates novel, recycled instruments and installs them in unexpected public places. Parker worked with students and faculty from Austin SoundWaves music program — and artist/instrument-makers Travis Weller and Jebney Lewis — to create the instrument cum sculptures.

After a celebratory concert on Monday, the large-scale instruments will stay at City Hall for a month for any passersby to play. Then, they’ll move to locations around downtown for more surprise encounters.

Concert 6:30 p.m. Monday. Austin City Hall, 301 W. Second St. Free.