In the medieval tradition of ballads, a recurring theme is that of transformation. In a staged concert for chamber orchestra, singers and dancers called Varelser och Ballader (Beings and Ballads), we explored this theme using ballads coupled with contemporary poetry and new music. The performance made use of custom-made digital musical instruments, using video analysis and large-scale physical interfaces for transformative purposes. In this article, we describe the piece itself as well as how uncanny qualities of the digital were used to emphasize eerie themes of transformation and deception by the supernatural beings found in the medieval ballads.