Abstract: A method for modifying a sound signal, the method comprising: a step of obtaining time frames of the sound signal, in the frequency domain; for at least one time frame, applying a first transformation of the sound signal in the frequency domain, comprising: a step of extracting a spectral envelope of the sound signal for the at least one time frame; a step of calculating frequencies of formants of the spectral envelope; a step of modifying the spectral envelope of the sound signal, the modification comprising application of an increasing continuous transformation function of frequencies of the spectral envelope, parameterized by at least two frequencies of formants of the spectral envelope.

Abstract: An audio processing device including a factorization unit which factorizes frequency information obtained by performing time-frequency transformation on an audio signal of a plurality of channels into a channel matrix representing characteristics of a channel direction, a frequency matrix representing characteristics of a frequency direction, and a time matrix representing characteristics of a time direction; and an extraction unit which extracts the frequency information of audio from an arbitrary designated direction based on the channel matrix, the frequency matrix, and the time matrix.

Abstract: An audio processing device including a factorization unit which factorizes frequency information obtained by performing time-frequency transformation on an audio signal of a plurality of channels into a channel matrix representing characteristics of a channel direction, a frequency matrix representing characteristics of a frequency direction, and a time matrix representing characteristics of a time direction; and an extraction unit which extracts the frequency information of audio from an arbitrary designated direction based on the channel matrix, the frequency matrix, and the time matrix.