The bass will play an integral part in the world premiere of Risa Jaroslow + Dancers’ “Touch Bass” this weekend at ODC. The full-length dance features choreography by Jaroslow and music by local bassist Lisa Mezzacappa. The evening includes trained and non-trained dancers in performance, “but it marks the first time I’ve choreographed musicians and their instruments,” said Jaroslow in a statement. Because of the sheer size of a double bass, this is not a minor choice.