Bespoke Electromechanical Instrument was built by Jay Harrison as part of a dissertation undertaken on the Creative Music Technology degree course at Staffordshire University. The instrument, running on Arduino Mega 2560 is designed  to allow each note to be independently placed in a space:

The project involved the creation of an electromechanical system capable of autonomously playing a bespoke Lithophone musical instrument. The underlying idea was to create a Lithophone that allowed the audience to literally step inside it, giving a unique spatial and acoustic surround experience. Designing an autonomous electromechanical system was thought to be the most effective and reliable to solution to achieving this.

The Arduino Mega 2560 was used to interface Max/MSP with the physical circuitry. Control messages/signals would be sent out of a Max/MSP patch using Maxuino, these signals would then be interpreted by the standard firmata sketch loaded onto the board and would go on to trigger and control the 24 rotary solenoids and 24 servo motors that work to produce the notes.

In the video below the instrument is arranged in a 24-foot surround configuration and the audience is invited to experience the instrument from within offering a unique spatial dimension to the Lithophone intended to completely envelop the listener: