For more than an hour, around 30 singers followed teacher Anna Maria Gutschi through Graz's Kaiser-Franz-Josef-Kai underground car park, gradually making their way to its deepest section in search of the richest sound. There, the acoustics proved particularly strong. Gutschi said the broad corridors and reflective walls generated echoes similar to those found high in the mountains.
The underground venue provides an unusual answer to Graz's geography. The city is not perched high in the Alps but sits in a broad, relatively flat basin surrounded by hills and low mountain ranges on their eastern edge.
