A method, comprising: capturing first, second and third audio signals from respective three or more microphones spaced apart by predetermined distances and arranged in a predetermined geometric configuration; for each of a plurality of subbands of a frequency range and for at least first and second frequency-domain signals that are frequency-domain representations of corresponding first and second audio signals from the first and second microphones determining a time delay between the first and second frequency-domain signals; forming a first resultant signal comprising, for each of the plurality of subbands, a sum signal of one of the first or second frequency-domain signals shifted by the time delay and the other one of the first or second frequency-domain signals; forming a second resultant signal comprising, for each of the plurality of subbands, a difference signal between the shifted one of the first or second frequency-domain signals and the other one of the first or second frequency-domain signals; for each of the plurality of subbands, determining, using at least said first and second frequency-domain signals and information about the predetermined geometric configuration, a direction of a sound source relative to the three or more microphones, comprising determining an angle of arriving sound relative to the first and second microphones, the angle having two possible values, delaying the sum signal by two different delays dependent on the two possible values to create two shifted sum frequency-domain signals, using a frequency-domain signal corresponding to a third microphone, determining which of the two shifted sum frequency-domain signals has a best correlation with the frequency-domain signal corresponding to the third microphone, using the best correlation, selecting one of the two possible values of the angle as the direction; accessing the first resultant signal; accessing the second resultant signal; accessing information corresponding to, for each of the plurality of subbands, the direction of a sound source relative to the three or more microphones; determining left and right output channel signals using the first and second resultant signals and the information corresponding to the directions; and outputting the left and right output channel signals. capturing first, second and third audio signals from respective three or more microphones spaced apart by predetermined distances and arranged in a predetermined geometric configuration; for each of a plurality of subbands of a frequency range and for at least first and second frequency-domain signals that are frequency-domain representations of corresponding first and second audio signals from the first and second microphones determining a time delay between the first and second frequency-domain signals; forming a first resultant signal comprising, for each of the plurality of subbands, a sum signal of one of the first or second frequency-domain signals shifted by the time delay and the other one of the first or second frequency-domain signals; forming a second resultant signal comprising, for each of the plurality of subbands, a difference signal between the shifted one of the first or second frequency-domain signals and the other one of the first or second frequency-domain signals; for each of the plurality of subbands, determining, using at least said first and second frequency-domain signals and information about the predetermined geometric configuration, a direction of a sound source relative to the three or more microphones, comprising determining an angle of arriving sound relative to the first and second microphones, the angle having two possible values, delaying the sum signal by two different delays dependent on the two possible values to create two shifted sum frequency-domain signals, using a frequency-domain signal corresponding to a third microphone, determining which of the two shifted sum frequency-domain signals has a best correlation with the frequency-domain signal corresponding to the third microphone, using the best correlation, selecting one of the two possible values of the angle as the direction; determining an angle of arriving sound relative to the first and second microphones, the angle having two possible values, delaying the sum signal by two different delays dependent on the two possible values to create two shifted sum frequency-domain signals, using a frequency-domain signal corresponding to a third microphone, determining which of the two shifted sum frequency-domain signals has a best correlation with the frequency-domain signal corresponding to the third microphone, using the best correlation, selecting one of the two possible values of the angle as the direction; accessing the first resultant signal; accessing the second resultant signal; accessing information corresponding to, for each of the plurality of subbands, the direction of a sound source relative to the three or more microphones; determining left and right output channel signals using the first and second resultant signals and the information corresponding to the directions; and outputting the left and right output channel signals.