Audio signal decorrelator structure for rendering source extent

A method for processing a first audio signal to generate two or more second audio signals, wherein the method comprises:

• generating two or more processed signals from the first audio signal, wherein generating each processed signal of the two or more processed signals is conducted by transforming the first audio signal to a frequency domain to acquire a transformed audio signal, by applying a delay, by applying allpass filters on the transformed audio signal, by conducting envelope shaping and by conducting an inverse transform to acquire the processed signal, and
• generating each second audio signal of the two or more second audio signals by conducting a mixing of at least two processed signals of the two or more processed signals,
• wherein applying the allpass filters is conducted using different filter coefficients for generating each of the two or more processed signals, and
• wherein the mixing is conducted in a different way for generating each of the two or more second audio signals.

A non-transitory digital storage medium having a computer program stored thereon to perform the method for processing a first audio signal to generate two or more second audio signals, wherein the method comprises:

• generating two or more processed signals from the first audio signal, wherein generating each processed signal of the two or more processed signals is conducted by transforming the first audio signal to a frequency domain to acquire a transformed audio signal, by applying a delay, by applying allpass filters on the transformed audio signal, by conducting envelope shaping and by conducting an inverse transform to acquire the processed signal, and
• generating each second audio signal of the two or more second audio signals by conducting a mixing of at least two processed signals of the two or more processed signals,
• wherein applying the allpass filters is conducted using different filter coefficients for generating each of the two or more processed signals, and
• wherein the mixing is conducted in a different way for generating each of the two or more second audio signals,
• when said computer program is run by a computer.