Final answer:
The chorale melody was heard in its fundamental form during the early Renaissance period in Europe.
Step-by-step explanation:
The chorale melody was heard in its fundamental form during the early Renaissance period in Europe. This period saw a shift towards polyphony and the use of the interval of the third in music. The voices in the chorale melody became increasingly independent, with a focus on smoothness and greater vocal range.
The melody would often be sung by one voice, while other voices provided harmonies and variations. Examples of this can be found in the motets of Cyprien de Rore, where the voices intertwine and create intricate harmonious sounds.