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Cross-synthesis may be summarized as consisting of the following steps:
- Perform a Short-Time Fourier Transform (STFT) of both the modulator and carrier signals
- Compute the spectral envelope of each time-frame
- Divide the spectrum of each carrier frame by its own envelope, thereby flattening it
- Multiply the flattened spectral frame by the envelope of the
corresponding modulator frame, thereby replacing the carrier's
envelope by the modulator's envelope.
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