A method and an apparatus for roasting a food product including: loading a batch of a predetermined food product type in a roasting device; setting operating parameters of the roasting device according to initial reference values for the predetermined food product type; performing feedback control during the heating of the product by obtaining, instant by instant, a value for a sound quantity which is relative to a sound emitted by the product, the sound being detected in a frequency range including both human ear audible and ultrasound frequencies; comparing the sound quantity's value obtained at each instant to a value taken by the sound quantity at such instant in a roasting curve of sound quantity versus time associated with the predetermined food product type; and adjusting, instant by instant, the operating parameters of the roasting device depending on the result of the comparison.
