A decoding device comprising: at least one circuit configured to: acquire one or more encoded audio signals including a plurality of channels and/or a plurality of objects and priority information for each of the plurality of channels and/or the plurality of objects; decode the one or more encoded audio signals according to the priority information; characterized in that the at least one circuit is further configured to: generate an audio signal for a first time at least in part by adding an output audio signal for a channel or object at the time and an output audio signal of the channel or object at a second time before or after the first time, wherein the output audio signal for the channel or object for a time is a signal obtained by the at least one circuit as a result of decoding in a case where decoding of the channel or object for the time is performed and is zero data in a case where decoding of the channel or object for the time is not performed; and perform a gain adjustment of the output audio signal of the channel or object at the time based on the priority information of the channel or object at the time and the priority information of the channel or object at the other time before or after the time. at least one circuit configured to: acquire one or more encoded audio signals including a plurality of channels and/or a plurality of objects and priority information for each of the plurality of channels and/or the plurality of objects; decode the one or more encoded audio signals according to the priority information; acquire one or more encoded audio signals including a plurality of channels and/or a plurality of objects and priority information for each of the plurality of channels and/or the plurality of objects; decode the one or more encoded audio signals according to the priority information; characterized in that the at least one circuit is further configured to: generate an audio signal for a first time at least in part by adding an output audio signal for a channel or object at the time and an output audio signal of the channel or object at a second time before or after the first time, wherein the output audio signal for the channel or object for a time is a signal obtained by the at least one circuit as a result of decoding in a case where decoding of the channel or object for the time is performed and is zero data in a case where decoding of the channel or object for the time is not performed; and perform a gain adjustment of the output audio signal of the channel or object at the time based on the priority information of the channel or object at the time and the priority information of the channel or object at the other time before or after the time. generate an audio signal for a first time at least in part by adding an output audio signal for a channel or object at the time and an output audio signal of the channel or object at a second time before or after the first time, wherein the output audio signal for the channel or object for a time is a signal obtained by the at least one circuit as a result of decoding in a case where decoding of the channel or object for the time is performed and is zero data in a case where decoding of the channel or object for the time is not performed; and perform a gain adjustment of the output audio signal of the channel or object at the time based on the priority information of the channel or object at the time and the priority information of the channel or object at the other time before or after the time.