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A Multidimensional Sound Controller

UX Timeline: 2 Months

Teammate: Andrew Piepenbrink

SQUISHBOI is the result of nearly a year of ideating, researching, prototyping, and eventually user testing at the 2019 CalArts Expo. This instrument is my brainchild and the most ambitious design project I've taken on. The goal was to create something totally new—an instrument unlike any other that could be bought off of the shelf at Guitar Center. Once a functional prototype was achieved, focus shifted to the presentation and aesthetics of the instrument, thus beginning a 2 month sprint that took us deep into the minds of the controller's intended users.

- Design Artifacts



Interface Designer

Interaction Designer

User Testing

Designed and prototyped a functional user interface. for the SQUISHBOI

Organized our team and lead ideation exercises. Ensured that deadlines were met.

Conducted hands on user testing at the 2019

CalArts Expo 

Analyzed user interaction in regards to the SQUISHBOI's Interface.

Researched everything from sensor technologies to Latex specifications. 


User Journey Diagram

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ML Software


Iron Pipe



UV Light

Wood + Hardware

Snare Drum

+ latex



For Prototype

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Circuit Parts

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PCB Software

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The prototyping of the SQUISHBOI controller took place in many stages and is still a work in progress, as I continue to explore design modifications and alternatives to its sensors and materials as I move the project toward its final design. I was fortunate to have done a considerable amount of design work on the SQUISHBOI's sensor circuit network prior to engaging in any form of formal user testing or design thinking processes. This allowed me to apply user-centric thinking to what was already a functional prototype rather than having to use any sort of Wizard of Oz fakery in the testing phase.

The first functional prototype was born on a breadboard using an Arduino Mega, and several breakout boards from Adafruit. I soon moved this prototype over to a cardboard structure containing a series of smaller breadboards which allowed me to test different sensor layouts and check for interferences in the Time of Flight (TOF) array. I also swapped the Arduino for a Teensy microcontroller which gave me MIDI functionality over the USB port and allowed for preliminary testing of sonic interactions prior to any costly fabrication.  


The enclosure for the final prototype was adapted from a drum shell. The drum's existing hardware allowed our team to easily attach and modify the rubberized latex membrane that would form the instruments playing surface. We were a bit worried that this would bias users interaction with the instrument, and noted this as a possible area of concern to pay close attention to during testing. The structure used to hold the SQUISHBOI's was assembled with wood and iron pipe making it easy to take apart and transport. 

Once the circuit was optimized, I began designing a PCB in Autodesk's Eagle software. Placing the circuit on a single board allowed for consistency in sensor placement across multiple prototypes, shortened the assembly time, and greatly improved durability. There was a tradeoff in terms of cost per square inch, but in this case we believed that the benefits of this design made it worthwhile.


SQUISHBOI was premiered at the 2019 CalArts Expo, a showcase of cutting edge student work from all departments that is put on annually and curated by student and distinguished alumni. SQUISHBOI was selected to make its debut in CalArts' MOD [modular] theatre alongside other projects from some of the top students in the Institute. SQUISHBOI was installed the week leading up to the event so that it could be presented, along with the rest of the MOD theatre team's projects, to CalArts' board of trustees. Although this presentation was more of an informal walkthrough, I still gathered some valuable insight from their interactions with the controller. Some participants (whom I inferred to be affiliated with Disney) remarked about how great something like this could be at their theme parks–an application for these technologies that hadn't yet crossed my mind. This was also a valuable experience because it gave me a dry run for the actual event, and helped me to realize that I needed more UV light to make the installation pop the way I was hoping for. Fortunately all it took to fix that issue was a quick run the hardware store and a bit more paint.


What We Learned

On the day of the event, everything was set and ready to go. I quickly reviewed the user journey diagram and took note of some of the key areas of concern within the interaction so that I could be sure to pay close attention to those aspects amidst the chaotic environment. The scene was set, and it was time to see if all of our work had paid off, or if it was time to get back to the drawing board.

Create better


Visual aesthetic

was successful

Key Findings

Test Alternative


Although SQUISHBOI's maiden voyage was by and large a success, there were some key insights gained. First, the drumshell gave many the impression that the instrument was meant to be struck rather than squished. Our team took this as a sign that perhaps a more unique enclosure might be necessary to consistently achieve the intended interaction. On the other hand, we did observe several users that were pleasantly surprised by the unexpected sonic results and expressed to us that they enjoyed the fact that most of the tech was obscured. We also learned that the sonic mappings were perhaps not intuitive enough for users to understand how the instrument's machine learning capabilities affected it's output. This lead us to the realization that in order to showcase SQUISHBOI's full sonic potential, much more signage and descriptions of the mappings might be necessary. It was our assumption that users wouldn't take the time to read that sort of information given the environment of Expo, but we were pleasantly surprised by the depth to which people engaged with the installation and the thoughtful questions that they asked. Another big discovery from the expo was that the fluorescent paint really worked! Upon entering the theatre, many walked straight to our sound sculpture like moths to a lamp. We knew we had to go big and bright to get users to engage with something that involved this much technology know how. We didn't want it to seem like we were selling something at a trade show. Our efforts to create a technical presentation that also served as an art piece made it an installation that engaged a wider audience than just music tech enthusiasts. At the end of the night, SQUISHBOI was presented with the CalArts Expo Ableton award. 

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