IDUN audio is a fast-growing startup developing virtual- and augmented reality audio software. Our unique spatial audio engine makes it possible to create many moving sound sources around a listener wearing headphones. The listener is free to move to explore the sound, due to tracking sensors in the headphones, and the sources can be placed in any acoustical space, from a small sound studio to a large concert hall. Since the advanced embedded software uses very low processing power, it can be built into wireless headphones. This makes it possible to solve many real-life problems, like communicating in difficult environments, navigation and mapping, interactive teamwork, traffic control, and so on.