The invention provides a method for stabilizing an egg or embryo in the uterus of a female mammal, eggs or embryos having improved stability in the uterus, and a method for preparing these eggs or embryos. In one embodiment, a watermark tree is formed from feature watermarks generated from a natural language processing stack having NLP analytics. A level signal synthesizer generates a synthesized level signal in which the level signals acquired from the collected sound signals of the two sound collectors are synthesized, and a detectoridentifier carries out analysis on the ambient sounds, based upon the synthesized level signal. A command is transmitted to the storage adaptor capable of inhibiting the storage adaptor from performing the initialization routine. The present invention may also be used in real-world systems to produce long-running, interactive, non-looping sound environments. The auxiliary header comprises information about the channel designed to transport the RPR frame from the source node input interface to the destination node output interface.