1. A method for transforming an audio mixture signal data structure x(t) representing an audio mixture signal having a specified component and a background component into a data structure corresponding to the specified component and a data structure corresponding to the background component, the method comprising: obtaining a guide signal data structure g(t) corresponding to a dubbing of the specified component and storing the guide signal data structure g(t) at a computer readable medium; modeling, by a first modeling module, a spectrogram of a specified signal data structure y(t) as a parametric spectrogram data structure {circumflex over (V)} p y having a plurality of frames and including, for each of the plurality of frames, a parameter that models a pitch difference between the guide signal data structure g(t) and the specified component; modeling, by a second modeling module, a spectrogram of a background signal data structure z(t) as a parametric spectrogram data structure {circumflex over (V)} p z ; estimating, by an estimating module, the parameters of the parametric spectrogram data structure {circumflex over (V)} p y to produce a temporary specified signal spectrogram data structure V i y for the specified signal data structure y(t); estimating, by the estimating module, the parameters of the parametric spectrogram data structure {circumflex over (V)} p z to produce a temporary background signal spectrogram data structure V i z for the background signal data structure z(t); obtaining, from the audio mixture signal data structure x(t), an audio mixture signal constant Q transform (CQT) data structure V x and storing the CQT data structure V x at the computer readable medium; and filtering, to provide a specified audio signal CQT data structure V y and a background audio signal CQT data structure V z , the audio mixture signal CQT V x using the temporary specified signal spectrogram V i y and the temporary background signal spectrogram V i z ; wherein the specified audio signal CQT data structure V y is the data structure corresponding to the specified component, and wherein the background audio signal CQT data structure V z is the data structure corresponding to the background component.