An apparatus for generating an output signal having at least two output channels from an input signal having at least two input channels, comprising: an ambient/direct decomposer (110; 210; 310; 410; 610), an ambient modification unit (120; 220; 320; 420); and a combination unit (130; 230; 330; 430); wherein the ambient/direct decomposer (110; 210; 310; 410; 610) is adapted to decompose at least two input channels of the input signal such that each one of the at least two input channels is decomposed into one of at least two ambient signals of an ambient signal group and into one of at least two direct signals of a direct signal group; and such that the ambient/direct decomposer (110; 210; 310; 410; 610) is adapted to decompose an input channel of said at least two input channels into an ambient signal of said at least two ambient signals and into a direct signal of said at least two direct signals; wherein the ambient modification unit (120; 220; 320; 420) is adapted to modify said ambient signal or a signal derived from said ambient signal to obtain a modified ambient signal as a first output channel for a first loudspeaker of a plurality of loudspeakers such that the first output channel comprises a first amount of ambient signal portions of said input channel; and wherein the combination unit (130; 230; 330; 430) is adapted to combine said ambient signal or a signal derived from said ambient signal and said direct signal or a signal derived from said direct signal as a second output channel for a second loudspeaker of the plurality of loudspeakers, such that the second output channel comprises a remaining amount of the ambient signal portions of said input channel plus the direct signal portions of said input channel. an ambient/direct decomposer (110; 210; 310; 410; 610), an ambient modification unit (120; 220; 320; 420); and a combination unit (130; 230; 330; 430); wherein the ambient/direct decomposer (110; 210; 310; 410; 610) is adapted to decompose at least two input channels of the input signal such that each one of the at least two input channels is decomposed into one of at least two ambient signals of an ambient signal group and into one of at least two direct signals of a direct signal group; and such that the ambient/direct decomposer (110; 210; 310; 410; 610) is adapted to decompose an input channel of said at least two input channels into an ambient signal of said at least two ambient signals and into a direct signal of said at least two direct signals; wherein the ambient modification unit (120; 220; 320; 420) is adapted to modify said ambient signal or a signal derived from said ambient signal to obtain a modified ambient signal as a first output channel for a first loudspeaker of a plurality of loudspeakers such that the first output channel comprises a first amount of ambient signal portions of said input channel; and wherein the combination unit (130; 230; 330; 430) is adapted to combine said ambient signal or a signal derived from said ambient signal and said direct signal or a signal derived from said direct signal as a second output channel for a second loudspeaker of the plurality of loudspeakers, such that the second output channel comprises a remaining amount of the ambient signal portions of said input channel plus the direct signal portions of said input channel. <EOS>