Ok, guys I have the same question as the thread starter. I read the topic, but my spectrals not the same after edit and save the FLAC file. I want to remove some parasite sound from previous song in my FLAC's. When I do edit, after spectral analysis with Adobe Audition CC 2018 build 11.1.3, the spectrogram of original FLAC and edited FLAC isn't the same. I tried with Adobe Audition, Audacity, but spectrograms is altered. When save the edited FLAC I save it without dithering, and all other sound parameters are saved as source file, nothing added, but I clear see the spectrals not the same after edit. Where I am wrong? Anybody have experience with editing FLAC with absolute no quality loss? What type of software the music companies used for doing this?