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  • A music instrument developed by Lorenzo Cercelletta, Laura Bordin and Valentina Venza at IUAV Interaction Design Lab. Supervision by professors Gillian Crampton Smith and Philip Tabor.
    0. Abstract
    Steli is a collaborative musical instrument designed to make people, located in different spaces, cooperate. The system suggests users how to harmonically play the twin installations by reproducing real time the whole composition in both places.

    1. Space
    Stelis features make it perfect for a pair of places that are in front of each other, not too distant nor too close. In our case, we chose the two sides of Canale della Giudecca in Venice.
    2. Time
    The instrument would work all day long, but its perfect moment is at night-time, when the LED suggestions for which notes to play would be easily visible and users would catch a glimpse of their collaborators on the opposite side.
    3. Users
    Steli could be played by everyone: amateurs, children, musicians, even the wind.
    4. Mood
    Stelis mood could change depending on who is playing it. If moved by the wind, it could be subtle and poetic, whereas a human interaction would be more delightful and involving.
    5. Final prototype
    The final prototypes work thanks to two Arduino boards each controlling serveral sensors: a microphone, five flex sensors, and five LEDs stripes. The Arduinos are connected to two computers which exchange data via wireless to perform a collaborative melody.
    6. The Stelo
    This video shows how we built our Steli. A Stelo has an internal structure made of a handmade plexiglass stick. On the most flexible part of it a flex sensor was fixed together with a LEDs stripe at its very top. The stick has a square section and on two sides presents two grooves, where the LEDs and all the wires have been placed. Once all the technological parts were fixed, the stick was inserted inside a green plastic tube and the top of the tube covered with a plastic cap.
    7. The Box
    Every single component of the prototype has been hidden inside the boxes. Each box has two planes: the upper one contains the blocks for the steli blades, the speakers, the LEDs power pack and a power strip. In the lower one there are the computer, the Arduino board and the breadboard with all the circuits. The whole structure is realised in cheap wood with walnut-like special finishing.
  • Who did what
    Concept: Lorenzo Cercelletta
    Brainstorming: Lorenzo Cercelletta, Laura Bordin, Valentina Venza
    Design: Lorenzo Cercelletta (sounds), Laura Bordin (logo), Valentina Venza (schematics)
    Prototype: Lorenzo Cercelletta (boxes, steli, solenoid structure), Laura Bordin, Valentina Venza (steli)
    Coding: Laura Bordin (Processing, Arduino), Valentina Venza (Processing, Arduino)
    Physical Computing: Laura Bordin, Lorenzo Cercelletta