"The source made me think of German metro-tunnels, so I wanted to include footsteps, which THEN put me in mind of the poem The Panther by Rainer Maria Rilke. The poem is (amongst other things) about the impotent power of the caged big cat, forlorn, empty-hearted, broken, pacing but going nowhere. I'm reading the poem in my faltering German! 

"For the second half of the piece, I wanted to highlight the energy and momentum of such a magnificent beast, so I cut two, 4-bar sections of didgeridoo from the field recording, tuned them and got them into the right tempo, and set those to a pulse to echo the heartbeat of the cat."

Didgeridoo busker in Hannover reimagined by Kevin O'Connor.