Originally Posted by schwaggs
Thank you Chucky - the master of all visual aids! Can you give me or point me to the crib notes version of what these movie graphs mean? Are they a summation of the seconds at each frequency in the movie or something? Whats the difference between the red and green lines?
Those graphs are called PvA: Peak vs Average
gets hold of the movie, he would extract the audio track and run analysis on that. Green is the peak level, and Red is the average level. At the bottom is the frequency and at the right is the loudness. Usually we use the peak to quantify the movie's extension. I think a lot of movies have averages @ -45dB.
Mad Max Fury Road:
Notice that the red line goes as high as -33dB and the peak goes as high as -7dB? This means the movie is super hot. Adjust the MV accordingly. In fact, the cops came when I was watching it on a Friday night.
Edge of Tomorrow:
The first 40 seconds contains 30Hz, 25 Hz, 20 Hz, 15 Hz, and 10 Hz sine waves that go to -7dB. No wonder it will make chuffmasters out of subs. The rest of the movie hovers around -50dB, so the movie is actually mixed low,
Kong: Scull Island:
It has decent amount of bass, with averages of 45dB from 17 to 33 Hz. The 17 Hz peak is at -13dB so it might induce chuffing for lesser subs out there. It is a 1 Hz movie.
As for the extension of a movie, look at the peak and deduct 10dB from that. For Kong, the 17 Hz peak is at -13dB and -23dB falls at 11 Hz or so. Then look to the left, 1 Hz is louder than -23dB. Therefore this is a 1 Hz movie.
Hope this helps.