Résonnance is an international foundation recognized for pure public utility, currently bringing together 8 subsidiaries created in 7 countries, on the initiative of pianist Elizabeth Sombart and the directors of the subsidiaries, in Belgium, Spain, France (Brittany and Paris), Italy, Lebanon, Romania and Switzerland. They work in the field of classical music and improvisation.

The Foundation offers several hundred solidarity concerts each year.

Each subsidiary develops its own specific features: piano schools, recitals in places of solidarity such as retirement homes, hospitals, specialized institutions and prisons, master classes for training in Resonance Pedagogy: Phenomenology of sound and sound. gesture, conferences.