Originally Posted by Krazykaj
I got very involved with the waterfall charts over at the HT forums
(I'm "Kaj" in the waterfall thread
, and come in about the middle or the topic with my collection of waterfall charts)
I've been looking quickly through this thread, and thought I just might mention to those doing these new charts, that you need to watch how you work with your 'monitoring' levels, and compare apples with apples, especially if you are using a PC for the media source.
Movies are NOT (unfortunately) all equal in their sound levels. Movie 'A' might have dialogue (a reference level) at -15db, where-as movie 'B' may have dialogue at -5db.
Some movies are mixed much, much louder than other movies. So if you are leaving all your settings (volume levels etc.) the same on your audio inputs when plotting the graphs for these different movies, you aren't keeping things the same for each movie.
That is why one movie will seem to have massive amounts of LFE in its waterfall chart, whereas another one will have (by comparison of graphs) hardly anything. However, in reality, if you 'turn up' the 'soft' movie (record it louder); OR 'turn down' the 'loud' movie (record it softer), you will see the results will make more sense.
A good measure of this is to get 'normal dialogue' in each movie to a certain SAME level, turning up OR down each movie, so that they are as similar as you can get them in real volume'.
If you don't 'standardize' the movies, you must let people know so that they read the waterfall charts INDIVIDUALLY
. You cannot, should not compare the graph of one movie to another. Especially if you start to say "whao, this movie has much more bass than that other movie!!!"
It took me a while to realize this, because it always puzzled me, when I sat to watch movie 'A', it sounded really good, bass and all. Then when I watched movie 'B', it also sounded really good also, bass and all.
So I eagerly went to plot their waterfall graphs. . . However, when I plotted the waterfall charts, movie 'A' had plenty of deep red/pink (loud LFE) areas, but movie 'B' on the other hand, had only a splatter of those colours.
When I then went back to my HT, and played the movies again, I noticed on my Yamaha Z9, that for one movie, I was watching it at -18db, and for the other movie I was watching it a -9db.
So I when back, adjusted the volumes on my PC inputs accordingly (using, matching the dialogue as a reference) and re-plotted the graphs . . . voila, much more consistent results.
So yeah, for those making the graphs, it might be some food for thought (maybe not
For those just looking at the charts, it might be something to keep in mind. Make sure you keep things in proportion.
Anyway, my 2c
(disagree with me completely if you like)
Have fun ... I look forward to more charts,