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Thread: [queued] SENSEI - A synthesizer with multidimensional sound shaping

  1. #1
    Junior Member ohoomens's Avatar
    Join Date
    Feb 2019

    [queued] SENSEI - A synthesizer with multidimensional sound shaping

    Hey there!

    As part of my bachelor thesis I developed and built this thing. The main idea is to provide an innovative usage concept and a new understanding of sound shaping. With the help of newly worded sound characteristics the user is supposed to be able to shape sound according to his imagination. Paired with intuitive peripherals the created system is supposed to shorten training periods as well as inviting users to explore worlds of sound effortlessly.


    Full size images:
    Image 1
    Image 2
    Image 3
    Image 4
    Image 5
    Tech diagram


    Core peripherals:
    • Joystick with FSR sensors | User is able to control "new" sound characteristics: Distance (y axis), Form (x axis), Sharpness (FSR sensor 1), Richness (FSR sensor 2) and Color (FSR sensor 3)
    • The parameters can be locked and freed with the capacitive ring around the joystick
    • Touch keyboard with pitch bend segments
    • Wireless bracelet with gyro ring | User is able to play vibrato
    • Additionally the user can transpose the two octaves with the + and - keys

    Production techniques:
    • 3D printing
    • CNC
    • Loads of soldering & tinkering

    Tech details:
    • Sunvox on RPi used for sound synthesis due to heavy load (FX & Filters)
    • touchRead: 4x 16 channel MUX to read capacitance of keyboard segments
    • touchRead: Reduced number of samples / decreased prescaler to reduce time for readout (8-10ms for 50 key segments and 3 buttons)
    • Neopixel used for optical feedback (transpose & parameter freeze)
    • Main unit contains: Teensy 3.6, 4x CD74HC4067, 3x FSR sensors, Generic Adafruit Joystick, RPi 3 + pHAT DAC, NRF24L01, built-in battery pack, Neopixel bar & strips, A LOT OF WIRES;
    • Bracelet contains: Arduino Pro Mini 3,3V 8MHz, MPU6050, NRF24L01+ SMD, TP4056, 150mAh LiPo Battery;

    AMA if you have any questions. I don't know when I will publish the code, probably when refactoring is done and I feel comfortable enough.

  2. #2
    Wow, it looks lovely and i love the ideas for sound shaping. Would be interesting to see/hear it in action! Nice work!

  3. #3
    Junior Member ohoomens's Avatar
    Join Date
    Feb 2019
    Here is a video

  4. #4
    Very nice! It's awesome that you can do vibrato and pitch bend with the same fingers that play the notes. Are the FSRs on the joystick? I'd love to see the code that runs touchRead side of it.

  5. #5
    Administrator Paul's Avatar
    Join Date
    Oct 2012
    The 6 image links seem to be dead.

    Are these images still available somewhere? Any chance to share them here?

  6. #6
    Junior Member ohoomens's Avatar
    Join Date
    Feb 2019
    @Paul Yes! Here they are Thanks for the feature on the front page, I really do appreciate it!

    Attachment 20903

    Full size:

  7. #7
    Senior Member
    Join Date
    Jul 2020
    What a fantastic machine. Is there more music?

  8. #8
    Deleted User
    Guest is offline. What happened?

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