A method implemented by computer means, for processing sound data originating from at least one sensor mounted on an acoustically radiating structure of a music instrument and for activating at least one actuator applied against the acoustically radiating structure, the sensor sensing an acoustic signal originating from the vibration of the radiating structure, said radiating structure carrying at least one actuator controlled by said computer means and involved in the vibration of the radiating structure, the method including: a) measuring a transfer function of the actuator, radiating structure, and sensor assembly, b) controlling activation of the actuator to make the radiating structure vibrate, according to a selected setpoint: - while taking account of the measured transfer function, and - while taking account of the acoustic signal sensed by the sensor in a feedback mode, and wherein the activation of the actuator is controlled in a hybrid "feedback/feedforward" mode, and wherein the selected setpoint includes a command of at least one sound effect from among a sound amplitude change, an equalisation, an echo, a reverberation, a distortion, a phase change, a frequency change, an amplitude modulation, and a combination of these sound effects, the method including one or more iteration(s) of the steps: - on command of the sound effect selected by the user, adjusting feedforward-type gains and gains of a feedback control, according to the selected sound effect setpoint, - updating said transfer function measured with the adjusted gains, - controlling the activation of the actuator to make the radiating structure vibrate, according to the setpoint corresponding to the selected sound effect, while taking account of the updated transfer function and of the acoustic signal sensed by the sensor in the feedback mode. the sensor sensing an acoustic signal originating from the vibration of the radiating structure, said radiating structure carrying at least one actuator controlled by said computer means and involved in the vibration of the radiating structure, the method including: a) measuring a transfer function of the actuator, radiating structure, and sensor assembly, b) controlling activation of the actuator to make the radiating structure vibrate, according to a selected setpoint: - while taking account of the measured transfer function, and - while taking account of the acoustic signal sensed by the sensor in a feedback mode, and wherein the activation of the actuator is controlled in a hybrid "feedback/feedforward" mode, a) measuring a transfer function of the actuator, radiating structure, and sensor assembly, b) controlling activation of the actuator to make the radiating structure vibrate, according to a selected setpoint: - while taking account of the measured transfer function, and - while taking account of the acoustic signal sensed by the sensor in a feedback mode, and wherein the activation of the actuator is controlled in a hybrid "feedback/feedforward" mode, - while taking account of the measured transfer function, and - while taking account of the acoustic signal sensed by the sensor in a feedback mode, and wherein the activation of the actuator is controlled in a hybrid "feedback/feedforward" mode, and wherein the selected setpoint includes a command of at least one sound effect from among a sound amplitude change, an equalisation, an echo, a reverberation, a distortion, a phase change, a frequency change, an amplitude modulation, and a combination of these sound effects, the method including one or more iteration(s) of the steps: - on command of the sound effect selected by the user, adjusting feedforward-type gains and gains of a feedback control, according to the selected sound effect setpoint, - updating said transfer function measured with the adjusted gains, - controlling the activation of the actuator to make the radiating structure vibrate, according to the setpoint corresponding to the selected sound effect, while taking account of the updated transfer function and of the acoustic signal sensed by the sensor in the feedback mode. - on command of the sound effect selected by the user, adjusting feedforward-type gains and gains of a feedback control, according to the selected sound effect setpoint, - updating said transfer function measured with the adjusted gains, - controlling the activation of the actuator to make the radiating structure vibrate, according to the setpoint corresponding to the selected sound effect, while taking account of the updated transfer function and of the acoustic signal sensed by the sensor in the feedback mode.