This paper presents the Tibetan Singing Prayer Wheel, a handheld, wireless, sensor-based musical instrument with a humancomputer interface that simultaneously processes vocals and synthesizes sound based on the performer's hand gestures with a one-to-many mapping strategy. A physical model simulates the singing bowl, while a modal reverberator and a delay-andwindow effect process the performer's vocals. This system is designed for an electroacoustic vocalist interested in using a solo instrument to achieve performance goals that would normally require multiple instruments and activities.

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