Frequency analysis in audio is a common technique (called "FFT"). How it works though is key to understanding its benefits and limitations. Importantly, without knowing how it works, you will have an impossible time comparing one frequency spectrum analysis to another. In this video I explain what an FFT is, and show in real time the effect of various parameters.
See this article on all aspects of audio measurements for devices such as DACs: [ Ссылка ]
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