Hi guys, I use a software call Spek to identify fake flac files. It shows frequency range of the files and a cut off around 15 Khz usually means (unless the songs was recorded like that) a fake flac. However, something bugs me about this analysis. Suppose Spek shows the frequency response of a file is around 22 Khz (which is usually the case with authentic files) but it still sounds bad. Could it simply be a case of bad recording or could it still be fake somehow? Here is an example below. Is it possible the following file could be a fake flac though it looks there is no frequency cut off?