The stereo audio in Figure 7.4 is extracted from the compound item when the MXF file is created and is stored separately in a SMPTE 382M compatible AES or BWF sound element. This sound element is explained in Chapter 6. Assuming no audio processing has been performed to the audio samples, it is likely that the main differences between the files shown in Figures 7.3 and 7.4 will be:

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• Each essence file is stored using OP-Atom.