  A scattering transform defines a locally translation invariant representation
which is stable to time-warping deformations. It extends MFCC representations
by computing modulation spectrum coefficients of multiple orders, through
cascades of wavelet convolutions and modulus operators. Second-order scattering
coefficients characterize transient phenomena such as attacks and amplitude
modulation. A frequency transposition invariant representation is obtained by
applying a scattering transform along log-frequency. State-the-of-art
classification results are obtained for musical genre and phone classification
on GTZAN and TIMIT databases, respectively.
