A method for generating an output audio signal in an audio capture system having a plurality of microphones, the method comprising: receiving at least a first audio signal and a second audio signal from the plurality of microphones; generating a first plurality of frequency sub-band signals from the first audio signal corresponding to a plurality of frequency sub-bands and generating a second plurality of frequency sub-band signals from the second audio signal corresponding to the plurality of frequency sub-bands; for each of the first and second pluralities of frequency sub-band signals, applying a frequency band-dependent offset to generate a first plurality of offset frequency sub-band signals from the first plurality of frequency sub-band signals and a second plurality of offset frequency sub-band signals from the second plurality of frequency sub-band signals; determining, by a processor, an overall correlation metric between the first plurality of offset frequency sub-band signals and the second plurality of offset frequency sub-band signals; responsive to the overall correlation metric exceeding a first predefined threshold, processing the audio signals according to a correlated audio signal processing algorithm to generate an output audio signal; and responsive to the overall correlation metric not exceeding the first predefined threshold, processing the audio signals according to an uncorrelated audio signal processing algorithm to generate the output audio signal characterised in that processing the audio signals according to the uncorrelated audio signal processing algorithm comprises: for each of the plurality of frequency sub-bands, selecting one of the first plurality of frequency sub-band signals or the second plurality of frequency sub-band signals having a lowest noise metric; applying noise suppression processing to the selected sub-band signals; and combining the selected sub-band signals to generate the output audio signal. receiving at least a first audio signal and a second audio signal from the plurality of microphones; generating a first plurality of frequency sub-band signals from the first audio signal corresponding to a plurality of frequency sub-bands and generating a second plurality of frequency sub-band signals from the second audio signal corresponding to the plurality of frequency sub-bands; for each of the first and second pluralities of frequency sub-band signals, applying a frequency band-dependent offset to generate a first plurality of offset frequency sub-band signals from the first plurality of frequency sub-band signals and a second plurality of offset frequency sub-band signals from the second plurality of frequency sub-band signals; determining, by a processor, an overall correlation metric between the first plurality of offset frequency sub-band signals and the second plurality of offset frequency sub-band signals; responsive to the overall correlation metric exceeding a first predefined threshold, processing the audio signals according to a correlated audio signal processing algorithm to generate an output audio signal; and responsive to the overall correlation metric not exceeding the first predefined threshold, processing the audio signals according to an uncorrelated audio signal processing algorithm to generate the output audio signal characterised in that processing the audio signals according to the uncorrelated audio signal processing algorithm comprises: for each of the plurality of frequency sub-bands, selecting one of the first plurality of frequency sub-band signals or the second plurality of frequency sub-band signals having a lowest noise metric; applying noise suppression processing to the selected sub-band signals; and combining the selected sub-band signals to generate the output audio signal.