Cinq formes d’appel (alluding among others to a famous piece by Jean-Philippe Rameau) renews the genre of ‘character pieces’. Here is one that evokes practices – still in use today – where circumstances of danger, needing to regroup people scattered in a territory, requires to sound a call for them to act in unison.

The cries are those of questions and of songs resounding in the mountains. The sound signals are those emitted at sea to guide the captains of ships or, in foggy weather, to war...