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Detecting fake hi-res audio in the browser: a peak-hold FFT with the Web Audio API
The file header says 24-bit/96 kHz, but that only describes the container. If you want to know what is actually in the file, you have to look at the spectrum. I built a browser tool that does this for The Audio Stuff, the FLAC & Hi-Res Audio Checker . Here is how to build the core of one with the…