An audio processing method, comprising: receiving audio data, the audio data comprising a plurality of audio objects, the audio objects including audio data and associated metadata, the metadata including audio object position data; receiving reproduction speaker layout data comprising an indication of one or more reproduction speakers in the reproduction environment and an indication of a location of the one or more reproduction speakers within the reproduction environment, wherein the reproduction speaker layout data includes low-frequency-capable loudspeaker location data corresponding to more than one LFC reproduction speakers of the reproduction environment and main loudspeaker location data corresponding to one or more main reproduction speakers of the reproduction environment; rendering the audio objects into speaker feed signals based, at least in part, on the associated metadata and the reproduction speaker layout data, wherein each speaker feed signal corresponds to one or more reproduction speakers within a reproduction environment; applying a high-pass filter to at least some of the speaker feed signals, to produce high-pass-filtered speaker feed signals; applying a low-pass filter to the audio data of each of a plurality of audio objects to produce low-frequency audio objects; panning the LF audio objects based, at least in part, on the LFC loudspeaker location data, to produce LFC speaker feed signals; outputting the LFC speaker feed signals to the more than one LFC loudspeakers of the reproduction environment; and providing the high-pass-filtered speaker feed signals to one or more main reproduction speakers of the reproduction environment, the method characterized by further comprising decimating the audio data of one or more of the audio objects before or as part of the application of a low-pass filter to the audio data of each of the plurality of the audio objects. receiving audio data, the audio data comprising a plurality of audio objects, the audio objects including audio data and associated metadata, the metadata including audio object position data; receiving reproduction speaker layout data comprising an indication of one or more reproduction speakers in the reproduction environment and an indication of a location of the one or more reproduction speakers within the reproduction environment, wherein the reproduction speaker layout data includes low-frequency-capable loudspeaker location data corresponding to more than one LFC reproduction speakers of the reproduction environment and main loudspeaker location data corresponding to one or more main reproduction speakers of the reproduction environment; rendering the audio objects into speaker feed signals based, at least in part, on the associated metadata and the reproduction speaker layout data, wherein each speaker feed signal corresponds to one or more reproduction speakers within a reproduction environment; applying a high-pass filter to at least some of the speaker feed signals, to produce high-pass-filtered speaker feed signals; applying a low-pass filter to the audio data of each of a plurality of audio objects to produce low-frequency audio objects; panning the LF audio objects based, at least in part, on the LFC loudspeaker location data, to produce LFC speaker feed signals; outputting the LFC speaker feed signals to the more than one LFC loudspeakers of the reproduction environment; and providing the high-pass-filtered speaker feed signals to one or more main reproduction speakers of the reproduction environment, the method characterized by further comprising decimating the audio data of one or more of the audio objects before or as part of the application of a low-pass filter to the audio data of each of the plurality of the audio objects.