An apparatus for determining a spatial output multi-channel audio signal based on an input audio signal, comprising: a decomposer for decomposing the input audio signal to obtain a first decomposed signal having a first semantic property, the first decomposed signal comprising a foreground part of the input audio signal, and a second decomposed signal having a second semantic property being different from the first semantic property, the second decomposed signal comprising a background part of the input audio signal, wherein the decomposer is adapted for determining the second decomposed signal comprising the background part of the input audio signal by a transient separation method and the first decomposed signal comprising the foreground part of the input audio signal based on a difference between the second decomposed signal and the input audio signal; a renderer for rendering the first decomposed signal using a first rendering characteristic to obtain a first rendered signal having the first semantic property and for rendering the second decomposed signal using a second rendering characteristic to obtain a second rendered signal having the second semantic property, wherein the first rendering characteristic and the second rendering characteristic are different from each other, wherein the renderer is adapted for rendering the first decomposed signal according to a foreground audio characteristic as the first rendering characteristic and for rendering the second decomposed signal according to a background audio characteristic as the second rendering characteristic; and a processor for processing the first rendered signal and the second rendered signal to obtain the spatial output multi-channel audio signal. a decomposer for decomposing the input audio signal to obtain a first decomposed signal having a first semantic property, the first decomposed signal comprising a foreground part of the input audio signal, and a second decomposed signal having a second semantic property being different from the first semantic property, the second decomposed signal comprising a background part of the input audio signal, wherein the decomposer is adapted for determining the second decomposed signal comprising the background part of the input audio signal by a transient separation method and the first decomposed signal comprising the foreground part of the input audio signal based on a difference between the second decomposed signal and the input audio signal; a renderer for rendering the first decomposed signal using a first rendering characteristic to obtain a first rendered signal having the first semantic property and for rendering the second decomposed signal using a second rendering characteristic to obtain a second rendered signal having the second semantic property, wherein the first rendering characteristic and the second rendering characteristic are different from each other, wherein the renderer is adapted for rendering the first decomposed signal according to a foreground audio characteristic as the first rendering characteristic and for rendering the second decomposed signal according to a background audio characteristic as the second rendering characteristic; and a processor for processing the first rendered signal and the second rendered signal to obtain the spatial output multi-channel audio signal.