The dynamics and progression of F-B. Mâche's Synergies, based on instrumental fragments with clearly defined timbres, give the work a remarkable continuity of composition. The atmosphere is troubling in its density of sound spiced up with seductive aggregations of orchestral colours.

               Pierrette Mari, Diapason n°129, September-October 1968

In Mâche's Synergies, the continuity of the variations retains a very abstract aspect.
                   Martine Cadieu, Les Lettres Françaises n°1137, 23-29.6.1966

...the violence of the Mâche sequence with certain highly original rhythmic fragments

                                Jacques Longchampt, Le Monde, 25.6.1966