The directionality of microphones is often not high enough, resulting in compromised music recording. Beamforming for getting a signal with a higher directional response is limited due to spatial aliasing, dependence of beamwidth on frequency, and a requirement of a high number of microphones. The invention proposes a method to generate an output audio signal y from two or more input audio signals (x1, x2, . . . ), this method comprising the steps of: define one input signal as reference signal for each of the other input signals compute gain factors related to how much of the input signal is contained in the reference signal adjust the gain factors using a limiting function compute the output signal by subtracting from the reference signal the other input signals multiplied by the corresponding adjusted gain factors.