1. 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 and a second decomposed signal having a second semantic property being different from the first semantic property, wherein the decomposer is adapted for determining the first decomposed signal and/or the second decomposed signal based on a transient separation method; 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; and a processor for processing the first rendered signal and the second rendered signal to obtain the spatial output multi-channel audio signal.