Progressive calculation and application of rendering configurations for dynamic applications

An apparatus, comprising:

• an interface system and
• a control system configured to:
• receive, via the interface system, audio data, the audio data including one or more audio signals and associated spatial data, the spatial data indicating an intended perceived spatial position corresponding to an audio signal;
• render the audio data for reproduction via a set of loudspeakers of an environment, to produce first rendered audio signals, wherein rendering the audio data for reproduction involves determining a first relative activation of a set of loudspeakers in the environment according to a first rendering configuration, the first rendering configuration corresponding to a first set of speaker activations, wherein rendering the audio data for reproduction also involves determining and implementing loudspeaker delays in a frequency domain and implementing a set of transform block delay lines with separate read offsets;
• provide, via the interface system, the first rendered audio signals to at least some loudspeakers of the set of loudspeakers of the environment;
• receive, via the interface system, a first rendering transition indication, the first rendering transition indication indicating a transition from the first rendering configuration to a second rendering configuration;
• determine a second set of speaker activations corresponding to a simplified version of the second rendering configuration;
• perform a first transition from the first set of speaker activations to the second set of speaker activations;
• determine a third set of speaker activations corresponding to a complete version of the second rendering configuration;
• and
• perform a second transition to the third set of speaker activations without requiring completion of the first transition.

One or more non-transitory media having software stored thereon, the software including instructions for controlling one or more devices to perform a method, the method comprising:

• receiving, by a control system and via an interface system, audio data, the audio data including one or more audio signals and associated spatial data, the spatial data indicating an intended perceived spatial position corresponding to an audio signal;
• rendering, by the control system, the audio data for reproduction via a set of loudspeakers of an environment, to produce first rendered audio signals, wherein rendering the audio data for reproduction involves determining a first relative activation of a set of loudspeakers in the environment according to a first rendering configuration, the first rendering configuration corresponding to a first set of speaker activations, wherein rendering the audio data for reproduction also involves determining and implementing loudspeaker delays in a frequency domain and wherein determining and implementing speaker delays in the frequency domain involves determining and implementing a combination of transform block delays and sub-block delays applied by frequency domain filter coefficients, the sub-block delays being residual phase terms which allow for delays which are not exact multiples of a frequency domain transform block size;
• providing, via the interface system, the first rendered audio signals to at least some loudspeakers of the set of loudspeakers of the environment;
• receiving, by the control system and via the interface system, a first rendering transition indication, the first rendering transition indication indicating a transition from the first rendering configuration to a second rendering configuration;
• determining, by the control system, a second set of speaker activations corresponding to a simplified version of the second rendering configuration;
• performing, by the control system, a first transition from the first set of speaker activations to the second set of speaker activations;
• determining, by the control system, a third set of speaker activations corresponding to a complete version of the second rendering configuration;
• and
• performing, by the control system, a second transition to the third set of speaker activations without requiring completion of the first transition.