The InChorus project brings the choral heritage of the 20th and 21st centuries to life in its great diversity. On the occasion of the European Heritage Days in Grenoble, the choir proposes a programme in the form of a journey, of discoveries. A large part of the works performed will be pieces written for InChorus in 2022 following a collection made in Cameroon in the summer of 2021. The publishing of these scores responds to the desire to transcribe the Cameroonian tradition in a «universal» choral language, both to make discover it and to preserve it. Alongside these works, listening to choral frescoes written in other places (England/Finland/France, etc.) is necessarily a little singularly enlightened…