An apparatus for generating one or more audio channels, wherein the apparatus comprises: a metadata decoder for receiving one or more compressed metadata signals, wherein each of the one or more compressed metadata signals comprises a plurality of first metadata samples, wherein the metadata decoder is configured to generate one or more reconstructed metadata signals, so that each reconstructed metadata signal of the one or more reconstructed metadata signals comprises the first metadata samples of a compressed metadata signal of the one or more compressed metadata signals, said reconstructed metadata signal being associated with said compressed metadata signal, and further comprises a plurality of second metadata samples, wherein the metadata decoder is configured to generate the second metadata samples of each of the one or more reconstructed metadata signals by generating a plurality of approximated metadata samples for said reconstructed metadata signal, wherein the metadata decoder is configured to generate each of the plurality of approximated metadata samples depending on at least two of the first metadata samples of said reconstructed metadata signal, and an audio channel generator, wherein the first metadata samples of each of the one or more compressed metadata signals indicate information associated with an audio object signal of one or more audio object signals, wherein the audio channel generator is configured for generating the one or more audio channels depending on the one or more audio object signals and depending on the one or more reconstructed metadata signals, characterized in that the metadata decoder is configured to receive a plurality of difference values for a compressed metadata signal of the one or more compressed metadata signals, and is configured to add each of the plurality of difference values to one of the approximated metadata samples of the reconstructed metadata signal being associated with said compressed metadata signal to obtain the second metadata samples of said reconstructed metadata signal. a metadata decoder for receiving one or more compressed metadata signals, wherein each of the one or more compressed metadata signals comprises a plurality of first metadata samples, wherein the metadata decoder is configured to generate one or more reconstructed metadata signals, so that each reconstructed metadata signal of the one or more reconstructed metadata signals comprises the first metadata samples of a compressed metadata signal of the one or more compressed metadata signals, said reconstructed metadata signal being associated with said compressed metadata signal, and further comprises a plurality of second metadata samples, wherein the metadata decoder is configured to generate the second metadata samples of each of the one or more reconstructed metadata signals by generating a plurality of approximated metadata samples for said reconstructed metadata signal, wherein the metadata decoder is configured to generate each of the plurality of approximated metadata samples depending on at least two of the first metadata samples of said reconstructed metadata signal, and an audio channel generator, wherein the first metadata samples of each of the one or more compressed metadata signals indicate information associated with an audio object signal of one or more audio object signals, wherein the audio channel generator is configured for generating the one or more audio channels depending on the one or more audio object signals and depending on the one or more reconstructed metadata signals, characterized in that the metadata decoder is configured to receive a plurality of difference values for a compressed metadata signal of the one or more compressed metadata signals, and is configured to add each of the plurality of difference values to one of the approximated metadata samples of the reconstructed metadata signal being associated with said compressed metadata signal to obtain the second metadata samples of said reconstructed metadata signal.