Support files for DAFx10 paper:

Methods for separation of amplitude and frequency modulation in fourier transformed signals - Jeremy Wells

Methods for separation of amplitude and frequency modulation in fourier transformed signals - Jeremy Wells

Derivations of amplitude modulated Hann window (Mathematica 6 output)

pdf format

Mathematica (.nb) format

Matlab code that illustrates algorithms

Zip file (contains all m files and a readme file)

Audio examples (application of processing to frequency shaping):

Frequency reference (strings)

Whitened frequency reference (using standard frequency shaping)

Whitened frequency reference (amplitude change removed before standard frequency shaping - better isolation of just frequency information although there is some audible burbling)

Frequency reference (10 Hz tremolo applied to strings)

Whitened frequency reference (using standard frequency shaping - the tremolo can be clearly heard)

Whitened frequency reference (amplitude change removed before standard frequency shaping - the effect of the amplitude modulation is significantly reduced, although it is not completely eliminated)

Formant reference (drums)

Cross synthesis (standard frequency shaping - the tremolo of the frequency reference can be heard in the output)

Cross synthesis (amplitude change removed from frequency reference, frequency change removed from amplitude reference prior to frequency shaping - much better separation of formant and frequency reference in the output)

Any problems/questions please contact Jez Wells via email address given in paper

pdf format

Mathematica (.nb) format

Matlab code that illustrates algorithms

Zip file (contains all m files and a readme file)

Audio examples (application of processing to frequency shaping):

Frequency reference (strings)

Whitened frequency reference (using standard frequency shaping)

Whitened frequency reference (amplitude change removed before standard frequency shaping - better isolation of just frequency information although there is some audible burbling)

Frequency reference (10 Hz tremolo applied to strings)

Whitened frequency reference (using standard frequency shaping - the tremolo can be clearly heard)

Whitened frequency reference (amplitude change removed before standard frequency shaping - the effect of the amplitude modulation is significantly reduced, although it is not completely eliminated)

Formant reference (drums)

Cross synthesis (standard frequency shaping - the tremolo of the frequency reference can be heard in the output)

Cross synthesis (amplitude change removed from frequency reference, frequency change removed from amplitude reference prior to frequency shaping - much better separation of formant and frequency reference in the output)

Any problems/questions please contact Jez Wells via email address given in paper