The character created by Edgard Allan Poe is interpreted by the doublebassist and vocalist Massimo Ceccarelli. The William Wilson's double is represented by the instrument. The soloist is forced to a musical fight against his own double (bass) and its voluminous presence.
The play is especially focusing the vocal effect of the whispered voice of the alter ego, as depicted by Poe: "my rival had a weakness in the faucial or guttural organs, which precluded him from raising his voice at any time above a very low whisper. […]
In spite of his constitutional defect, even my voice did not escape him. My louder tones were, of course, unattempted, but then the key, - it was identical; and his singular whisper, it grew the very echo of my own"