He published a counterpoint treatise in 1836, around the same time as the first of his experimental compositions for multiple choruses and orchestras; from this year forward he devoted most of his energies to such creations.
This work was a set of three independent oratorios designed to be performed first consecutively, and then simultaneously, one of the few such experiments before the music of Charles Ives in the twentieth century.
According to the contemporary account, Raimondi was so overcome with the colossal sound of the three oratorios together at the end that he fainted, and the concert caused the sensation he had desired for so long.
As a result of this success he was honored by the Pope, receiving from him the position of maestro di cappella at St. Peter's, a level of acknowledgement he had never achieved in the operatic realm.
In his actual musical language, Raimondi was conservative, and his simultaneities work by following traditional rules of counterpoint, as well as by staying in a limited tonal universe.