*12* is a work in twelve movements by composer Eun Young Lee, commissioned and performed by Radius Ensemble in March 2016. The piece is written for all nine members of Radius Ensemble, and has an additional musical component that is performed by certain audience members using their cell phones.
The audience interaction goal in *12* is to make the audience participants truly feel like like performers; that is, their intentions should matter and their musical output should be heard by themselves, the musicians on stage, and the rest of the audience.
To accomplish this goal, we pre-selected 12 audience volunteers and assigned a group of three to each of four interactive movements. With a maximum of three audience members contributing per piece, it becomes possible to create customized phone-based instruments that compliment the sound of the stage musicians while maintaining musical coherence.
In addition, a large projected visual display showed animated computer graphics that highlighted the musical intent of the audience phone-based instruments.
