An arrangement of sound processing nodes (101a-c), the sound processing nodes (101a-c) being configured to receive a plurality of sound signals, wherein each sound processing node (101a-c) comprises: a processor (103a-c) configured to determine a beamforming signal on the basis of the plurality of sound signals weighted by a plurality of weights, wherein the processor is configured to determine the plurality of weights using a transformed version of a linearly constrained minimum variance approach, the transformed version of the linearly constrained minimum variance approach being obtained by applying a convex relaxation to the linearly constrained minimum variance approach; wherein the linearly constrained minimum variance approach is a robust linearly constrained minimum variance approach and wherein the processor is configured to determine the plurality of weights using a transformed version of the robust linearly constrained minimum variance approach parametrized by a parameter α and on the basis of the following equation and constraints: min. ∑ i ∈ V ∑ l = 1 M 1 2 ⁢ NM t i l ∗ t i l + α 2 w i H w i s. t. ∑ i ∈ V D i p H w i = s p ∀ p = 1,..., P ∑ i ∈ V t i l = ∑ i ∈ V NY i l H w i ∀ l = 1,..., M, wherein α provides a tradeoff between the minimization of the magnitude of the weights and the energy of the beamforming signal, w i denotes the i-th weight of the plurality of weights, Y i l denotes the vector of sound signals received by i -th sound processing node at the l -th microphone, V denotes the set of all sound processing nodes (101a-c), M denotes the total number of microphones (105a-c) of all sound processing nodes (101a-c), i.e. M = ∑ i = 1 N m i, wherein m i denotes the number of microphones of the i -th sound processing node, N denotes the total number of sound processing nodes (101a-c), D i p defines a channel vector associated with a p -th direction, P denotes the total number of directions, s ( p) denotes the desired response forming the beamforming signal for the p -th direction and, for index j, t j l = ∑ i ∈ V Y i l H w i. a processor (103a-c) configured to determine a beamforming signal on the basis of the plurality of sound signals weighted by a plurality of weights, wherein the processor is configured to determine the plurality of weights using a transformed version of a linearly constrained minimum variance approach, the transformed version of the linearly constrained minimum variance approach being obtained by applying a convex relaxation to the linearly constrained minimum variance approach; wherein the linearly constrained minimum variance approach is a robust linearly constrained minimum variance approach and wherein the processor is configured to determine the plurality of weights using a transformed version of the robust linearly constrained minimum variance approach parametrized by a parameter α and on the basis of the following equation and constraints: min. ∑ i ∈ V ∑ l = 1 M 1 2 ⁢ NM t i l ∗ t i l + α 2 w i H w i s. t. ∑ i ∈ V D i p H w i = s p ∀ p = 1,..., P ∑ i ∈ V t i l = ∑ i ∈ V NY i l H w i ∀ l = 1,..., M, wherein α provides a tradeoff between the minimization of the magnitude of the weights and the energy of the beamforming signal, w i denotes the i-th weight of the plurality of weights, Y i l denotes the vector of sound signals received by i -th sound processing node at the l -th microphone, V denotes the set of all sound processing nodes (101a-c), M denotes the total number of microphones (105a-c) of all sound processing nodes (101a-c), i.e. M = ∑ i = 1 N m i, wherein m i denotes the number of microphones of the i -th sound processing node, N denotes the total number of sound processing nodes (101a-c), D i p defines a channel vector associated with a p -th direction, P denotes the total number of directions, s ( p) denotes the desired response forming the beamforming signal for the p -th direction and, for index j, t j l = ∑ i ∈ V Y i l H w i. α provides a tradeoff between the minimization of the magnitude of the weights and the energy of the beamforming signal, w i denotes the i-th weight of the plurality of weights, Y i l denotes the vector of sound signals received by i -th sound processing node at the l -th microphone, V denotes the set of all sound processing nodes (101a-c), M denotes the total number of microphones (105a-c) of all sound processing nodes (101a-c), i.e. M = ∑ i = 1 N m i, wherein m i denotes the number of microphones of the i -th sound processing node, N denotes the total number of sound processing nodes (101a-c), D i p defines a channel vector associated with a p -th direction, P denotes the total number of directions, s ( p) denotes the desired response forming the beamforming signal for the p -th direction and, for index j, t j l = ∑ i ∈ V Y i l H w i.