Product price $125.00
Ship from Wiesbaden, Germany
Supply ability 3 pieces / day
Avg. production time 1 day
Product packaging Paperboard boxes
Shipping packaging Corrugated box
Incoterms DAP
    Operating voltage
    5V (3,5 - 5,5)
    Input connections
    3,5mm audio jack for sensing electrodes
    Output conections
    DIN-5 MIDI OUT, optional CV (Control Voltage)


    MIDI Biodata Sonification Device

    Listen to your plants and create your own music together with them and your MIDI Biodata Sonification System.

    By attaching electrodes to the leaves of a plant or skin, fluctuations in galvanic conductance will produce MIDI notes, which are transmitted on a configurable MIDI channel. With a maximum of 5 note polyphony (matching the LEDs).

    Through sampling pulse widths and identifying fluctuations, MIDI note and control messages are generated.Features include Threshold, Scaling, Control Number, and Control Voltage using PWM through an RC Low Pass filter.

    Note that you do need a software or hardware MIDI synthesizer to use this device.

    It uses the same galvanic conductance sensing circuitry known from Sam Cusumano’s MIDI Biodata Sonification System but runs a modified firmware and has some nice addons:

    • 3D printed enclosure
    • settings menu (and button) to set the threshold, MIDI channel, note scale and LED brightness
    • updated PCB design for more safety
    • preinstalled, but optional CV (Control Voltage) output

    A control message is transmitted on CC 80, which is also presented as a 'Control Voltage' output via an unpopulated pin header - to modular synthesizers and equipment.

    For more information about the device, usage examples and to share experiences, join the MIDI Biodata Sonification forum hosted by Sam Cusumano, who originally designed this technology.

    Delivery Contents

    • MIDI Biodata Sonification Device (Assembled or Kit)
    • 2 pairs of pad electrodes
    • electrode cable with 3,5mm connector
    • battery connector (without batteries - you need 3x 1,5V AA batteries)


    A basic set of accessories is selected by default. A ready-to-use configuration with almost everything to get started. (except 3x1,5V AA batteries!)

    Currently the electrodes and cables are not available separately, but I will add them in the near future. You can contact me for replacement parts in the meantime.


    The enclosure is available standalone: todo: insert link here


    If you choose the "custom color" options, let me know the color of your like me via Treatstock message.
    You can also add a note during checkout.

    Also feel free to ask for colors that are not listed yet.

    Settings menu

    The settings menu works with an extra button and the knob to set the threshold, MIDI channel, note scale and LED brightness. 

    1. Press the button once to enter the menu.
    2. Move the knob until you've selected the setting you want to change (10 seconds timeout when knob is not moved)
    3. Press the button to enter the selected settings
    4. Change value of setting by moving the knob.
    5. Store value by pressing button again.

    In the first menu level, you can select the setting to be changed by the following color coding. 

    SettingLED colorDescription
    ThresholdredSelectivity of the electrodes. Moving it further away from the OFF-position decreases sensitivity.
    Note ScaleyellowChromatic, Major, Indian and Minor scale are available. The corresponding LED flashes after entering this setting and the scale can be selected using the knob. Press button to apply and leave the menu.
    MIDI ChannelgreenSelect MIDI-Channel 1-16 by turning the knob. You’ll need MIDI equipment connected to see changes. No LED effects.
    LED BrightnessblueSelect LED effects brightness. From zero to full by using the knob. Blue LED is flashing to indicate the selected brightness. Can be used to save some power.

    To restore default settings, press the button during power-on. It will acknowledge the reset by blinking white.

    DIY Kit

    The device is also available as DIY Kit with only the surface-mount components pre-soldered for 15$ discount.

    These parts have to be soldered in the DIY Kit:

    • LMC555/NOPB (DIP-8)
    • 10K Potentiometer with switch
    • 100µF capacitor
    • DIN-5 MIDI connector
    • right-angled tactile button
    • 3,5mm (1/8in) Mono input jack
    • pin headers

    Visual 3D models

    Main enclosure
    Bottom Lid
    Light diffuser

    See also