Definition: The term "8505_postprocess_freq_analysis_bro_x509.conf" refers to a configuration file used for preprocessing audio data before it's being analyzed with neural networks. It contains options that can affect how the audio data is processed, such as normalization, amplitude scaling, and filtering. This file often includes settings like the sample rate (Hz) of the input signal, whether it should be normalized or not, the minimum and maximum range for amplitude values, and any other parameters that might influence the analysis process.