This article deals with the analysis of a work by François Bayle, L'oiseau moqueur (1963). The author worked at the INA-GRM (Paris) in order to realise a graphic record of the piece using their proprietary acousmograph software. To work from this graphic record, He used three methods of analysis: identification and classification of sound objects using a Schaefferian typology, comparison of objects with one another following a paradigmatic approach, and presentation of the results obtained through enumeration of a certain number of values (duration, density of objects, etc.).