MIDI Controller Employs Lasers in a Theremin-like Design

In the world of music technology, a new instrument has emerged that harks back to the past while embracing the future. The MIDI Theremin, a unique creation, operates as a Theremin-style MIDI controller, using Time-of-Flight (TOF) sensors instead of traditional ultrasonic sensors.

At its heart, the MIDI Theremin functions as a specific Radio-Controlled (R/C) circuit with a pair of antennae acting as capacitors. This design, while different from traditional Theremins, can be considered a Theremin due to its similar operating principle. The device's brain is an Arduino Uno, a popular microcontroller board, and it sends note data to a computer or synthesizer through MIDI-out, a problem that has been solved for a long time.

The MIDI Theremin, when played, produces a sound through an external device due to its MIDI controller functionality. It's important to note that the MIDI Theremin does not produce its own sound; it relays the data to an external device for sound generation. This allows for a wide range of sounds to be created, limited only by the capabilities of the connected device.

The MIDI Theremin's unique feature is its use of VL53LOX TOF sensors, which are controlled over I2C. These sensors provide a smoother, more precise, and more stable output compared to ultrasonic sensors, contributing to the instrument's responsiveness and accuracy. An Adafruit library is used to interface with these sensors, simplifying the process of working with them.

Building the MIDI Theremin requires a significant amount of breadboard space due to its components. However, the effort is rewarded with a Theremin-style MIDI controller that offers a modern twist on a classic instrument.

The MIDI Theremin was built by the author aritrakdebnath2003 and was featured on Hackaday in a post titled "Theremin-Style MIDI Controller Does It With Lasers." The project was published and featured on the platform around or before 2022, although the exact date is not specified in the search results. A downloadable demo video of the MIDI Theremin in action is available as an MP4 file at Step 5 of the project.

This is not the first time a theremin-style instrument has been covered in the article. Previously, there have been theremin-style instruments based on other platforms, such as one based on a Commodore 64. The MIDI Theremin, with its unique design and modern technology, continues this tradition of innovation in music technology.

In conclusion, the MIDI Theremin is a fascinating example of how traditional instruments can be reinvented using modern technology. Its unique design, responsive controls, and versatility make it a valuable addition to any musician's toolkit. Whether you're a seasoned musician or a curious hobbyist, the MIDI Theremin offers a fresh take on a classic instrument.