https://www.mdu.se/

The Robo-Cajon is a robotic musical performer capable of real-time improvisation and live performance with a human performer. It is a wooden cajon, or box-shaped percussion instrument played with the hands, mounted with two push/pull solenoids that receives input from a separate cajon mounted with piezo contact microphones performed by a human. Rhythmic data from the human performer is first classified using a Multi-Layer Perceptron (MLP) and a Hidden Markov Model (HMM) is used for prediction and generating rhythmic patterns based on this prior classification. The Robo-Cajon demonstrates a novel and lightweight approach to human-computer interaction and real-time applications for various machine learning algorithms. The Robo-Cajon was realized using Max and Arduino.