Patent ID: 8462966

Claim:
An apparatus for calculating filter coefficients for a predefined loudspeaker arrangement, wherein the predefined loudspeaker arrangement comprises a plurality of loudspeakers, the apparatus comprising: a multi-channel renderer configured to calculate a filter coefficient for each loudspeaker of a virtual loudspeaker arrangement, being different from the predefined loudspeaker arrangement, based on a property of a virtual source of an audio object to be reproduced by the predefined loudspeaker arrangement, and wherein the multi-channel renderer is configured to determine an adapted filter coefficient for a loudspeaker of the predefined loudspeaker arrangement based on one or more calculated filter coefficients of one or more loudspeakers of the different virtual loudspeaker arrangement, wherein the different virtual loudspeaker arrangement is determined, so that at least one loudspeaker is added to the different virtual loudspeaker arrangement between two neighboring loudspeakers of the different virtual loudspeaker arrangement, if a distance between positions of the two neighboring loudspeakers is larger than a threshold distance, wherein the predefined loudspeaker arrangement comprise two neighboring loudspeakers corresponding to the two neighboring loudspeakers of the different virtual loudspeaker arrangement.