As it's mentioned in the main page of this web, the sounds and audio pieces conforming the whole walk are site specific designed.

Here, you can hear excerpts of the whole piece. To be able to listen the full 40 minutes composition listeners must get on location and walk with the appropriate devices (as it’s specified in the technology page).

All sound sources have been recorded and designed in the Hermitage of Braid. A big percentage of the sound samples where edited and morphed digitally using Logic Pro and Ableton Live and then played back with Max MSP software. The majority of the composition has been designed on location and because of that it has to be preserved in this very place, where it belongs.