Enhanced resampling for sinusoidal modeling parameters

The sinusoidal modeling parameters can be regarded as control signals, and resampling can be used for synthesis or time-scaling purposes. However, these signals are not zero-centered, and consist of a slow time varying envelope together with modulations (vibrato, tremolo). Using directly the classic resampling method could have disastrous effects. We present an addition to classic resampling aimed at achieving better results on such non zero-centered signals. Applied to the control signals of sinusoidal modeling, the method locally removes a polynomial envelope to the signal to perform better resampling on the residual modulations.