A signal processing apparatus for enhancing a voice component within a multi-channel audio signal, the multi-channel audio signal comprising a left channel audio signal (L), a center channel audio signal (C), and a right channel audio signal (R), the signal processing apparatus comprising a filter and a combiner , wherein the filter is configured to determine a measure representing an overall magnitude of the multi-channel audio signal over frequency upon the basis of the left channel audio signal (L), the center channel audio signal (C), and the right channel audio signal (R), to obtain a gain function (G) based on a ratio between a measure of magnitude of the center channel audio signal (C) and the measure representing the overall magnitude of the multi-channel audio signal, and to weight the left channel audio signal (L) by the gain function (G) to obtain a weighted left channel audio signal (L E ), to weight the center channel audio signal (C) by the gain function (G) to obtain a weighted center channel audio signal (C E ), and to weight the right channel audio signal (R) by the gain function (G) to obtain a weighted right channel audio signal (R E ); and wherein the combiner is configured to combine the left channel audio signal (L) with the weighted left channel audio signal (L E ) to obtain a combined left channel audio signal (L EV ), to combine the center channel audio signal (C) with the weighted center channel audio signal (C E ) to obtain a combined center channel audio signal (C EV ), and to combine the right channel audio signal (R) with the weighted right channel audio signal (R E ) to obtain a combined right channel audio signal (R EV ); wherein the filter is configured to determine the gain function (G) according to the following equations: G m k = P C m k P C m k + P S m k P C m k = C m k 2 P S m k = L m k − R m k 2 wherein G denotes the gain function, L denotes the left channel audio signal, C denotes the center channel audio signal, R denotes the right channel audio signal, P C denotes a power of the center channel audio signal (C) as the measure representing a magnitude of the center channel audio signal (C), P S denotes a power of a difference between the left channel audio signal (L) and the right channel audio signal (R), and the sum of P C and P S denotes the measure representing the overall magnitude of the multi-channel audio signal, m denotes a sample time index, and k denotes a frequency bin index. to determine a measure representing an overall magnitude of the multi-channel audio signal over frequency upon the basis of the left channel audio signal (L), the center channel audio signal (C), and the right channel audio signal (R), to obtain a gain function (G) based on a ratio between a measure of magnitude of the center channel audio signal (C) and the measure representing the overall magnitude of the multi-channel audio signal, and to weight the left channel audio signal (L) by the gain function (G) to obtain a weighted left channel audio signal (L E ), to weight the center channel audio signal (C) by the gain function (G) to obtain a weighted center channel audio signal (C E ), and to weight the right channel audio signal (R) by the gain function (G) to obtain a weighted right channel audio signal (R E ); and <EOS>