1. An apparatus for reconstructing an audio input signal, comprising: means for receiving a plurality of digital audio input signals provided by a digital signal source representing samples of the audio input signal; a trained neural network, which is a result of a set of training signals with corresponding filter coefficients previously taught to the neural network, responsive to the digital audio input signals to dynamically provide digital filter coefficients wherein the coefficients are produced based on the digital audio input signals received, unaccompanied by any training signals; a digital filter for producing a digital audio output signal for reconstruction of the audio input signal, said filter receiving the digital audio input signals and the coefficients provided by the neural network, wherein said coefficients dynamically configure the digital filter to produce a filtered digital audio output signal.