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An ASA cue for phase information

Dear List,


I am working on CASA (Computational Auditory Scene Analysis).

For feature extraction, I used an onset/offset analysis and a harmonic analysis to keep the track of temporal and spectral information, respectively. 

I need to have phase information, as well. But, spectrogram has no information of phase. I'm looking for a cue for phase information.


I will appreciate anyone who could give me any point.