Multi-channel audio energy loss compensation

Synthesizer multichannel audio for generating at least three output channels (1100) output using an input signal having at least one channel (1102) basis, deriving the base channel from the original signal (101, 102, 103) multi-channel, comprising: an element (1104) upmix for the upmix on at least one base channel based on a rule (201, 1407) introducing upmixing energy loss such that the at least three output channels are obtained , wherein the element (1104) upmixing functions to generate the at least three output channels in response to a measure (1106) energy and at least two parameters (1108) different up-mixing, so that at least three channels (1100) output having an energy greater than an energy of a signal obtained using only the rule introducing up-mixing energy loss, thus compensating having a power failure, depending on the error energy of the rule introducing upmixing energy loss, and inwhich the at least two parameters (1108) different up-mixing and the energy measure for controlling the up-mixer are included in the input signal, wherein the upmixing rule introduces energy loss is a rule predictive upmix using an up-mixing matrix having matrix coefficients, which are based on prediction coefficients, and wherein the at least two parameters different up-mixing are two elements (c11, c12) different matrix upmix or are parameters from which can be derived the two different elements of the up-mixing matrix.