Visualization: real frequency map to identify mp3 frequency cuts
Show real frequencies as a visualization so when I play a file I could see at which frequency a song is cut at. It should be like a frequency analyzer of any known sound editor program.
(The web is full of fake wavs, flacs and even fake 320 mp3s and many times it turns out that they are upconverted 128k mp3s. What I do now is that I open them in a sound editor and check the frequencies - one by one. If VLC could show real frequencies up to 22 kHz it would save a lot of work for many people - including all DJs in the world.)