He explains his process as follows: "Starting from medium brightness in the first sections, the timbre progresses towards a reverberating light marked by a very tight interval in the upper range (6th colour), to arrive at a dusk that, at the very end, sounds like a knell. " With his series of paintings of the same subject at different times of the day (haystacks, poplars, cathedrals), Claude Monet attempted to measure the degrees of light and tints.
Je pense cependant qu'on peut facilement entendre la succession des "treize couleurs", même sans compter sur ses doigts, car chacune d'entre elles est bien caractérisée.