PHOXES are a set of electronic music instruments, which are based on physical modeling sound synthesis. The instruments are modular, meaning that they can be combined with each other in various ways in order to create richer systems, challenging both the control and perception, and thereby also the sonic potential of the physical models.

The instruments are tube PHOX, particle PHOX, friction PHOX and drum PHOX.

The 4 different physical models are: tube, particles, friction and drum. Each model consists of an exciter (the part that models how the energy drives the model) and a resonator (the part that models how that energy resonates throught the model)

The excitation energy is input by the user manipulating the excitation controls (flute, crank, friction controller or drumpads). The resonator is controlled by manipulating 4 knobs for each of the models.

The PHOXES are modular, which means they can be combined in various ways. There are two ways of combining PHOXES: 1. PHOXES can be combined by using the output sound from one PHOX to drive the input energy of a second PHOX (for instance the sound from the friction PHOX can drive the tube model of the tube PHOX). 2. PHOXES can also be combined by letting the excitation controller from one PHOX drive the input energy of a second PHOX (for instance using the crank implemented on the particle PHOX to drive the drum model of the drum PHOX.
More than two PHOXES can be combined in order to explore the sonic capabilities of the models.