This is madness.
I'd call out JPC but he still doesn't know how to calibrate and set up SL for movies with bass. Like this thread, he just latches onto some minuscule datum and twists it to ever lovin' death.
I'm calling out Ricci to be more specific as his comments may or may not relate to using SL to analyze an audio file accurately.
This is what SL is used for, and to millihertz accuracy when properly calibrated and set up... analyzing audio files
, as in movies on disc. It's absurd to even suggest that the analysis is so inaccurate as to require tilting the graph or whatever the nonsense written in this thread suggests.
It's clear you'll remain stuck where you are, which is fine and dandy, so you go ahead and take all of the waterfalls and peak hold vs average graphs Max, others and I have posted to date and recolor them, tilt them, whatever floats your boat.
I'm only posting here so that other members may not actually believe Husker wasted his time, money and effort in upgrading his system and that he is experiencing no difference in reproduction of movie content than he would from a PB-13 Ultra, suggesting that his comments to the contrary are psychoacoustic or psychotic in nature.
First, I want to clarify one point I made because I dislike being incorrectly explained by anyone who is as confused as you seem to be:
I overlaid the ELC curve to show that people who mix sound automatically bump the low end because they have ELC built into their hearing, which is where ELC comes from. The fact that the low end in every recording and every live show (House Curve) since Fred Flintstone has the low end bumped by mix engineers, re-recording engineers and FOH sound men is because that's how it sounds best to humans, not because SL tilts the analysis. My use of that fact has nothing whatsoever to do with pink noise, white noise or "method of graphing".
Like an RTA(nalyzer), SpectrumLab is a tool for analyzing audio and audio files. The difference between the 2 is that the best of RTAs available only work to 10 Hz and are nowhere near the resolution available from SL.
In days of yore, we used TrueRTAs peak hold function to capture scenes from movies. Those caps will be close to Maxmercy's SL peak hold caps, except that Max's graphs reflect far higher resolution than 1/24 octave and extend far lower in frequency.
Here's a very short clip of a scene from WOTW using the REW RTA app set to 1/48 octave. The graph is set to match SLs linear graph @ 5dB per division, both are set to use Hann windowing and the 2 graphs are normalized to exact scale. Since REW has no peak hold function in its RTA app, the scene was shortened and the button hit and this process was repeated and averaged. Either way, we never saw this tilted phenomenon you insist is there.
You said this:
That is a Spectrum Lab graph which has a 3 dB/octave rising slope as you go down in frequency vs REW, Omnimic or any other measurement software. This is why some of the current movie graphs at data-bass using actual disc data show a rising tail down below 10 Hz. In the 3-4 octaves below 10 Hz there is an increase of 9-12 dB.
REW says this:
REW V5 Help
The Measurement Sweep signal is used by REW when measuring system response. It consists of a logarithmic sweep from the start frequency to the end frequency. The sweep duration is set using the Length control. If the start frequency is below 20Hz the signal begins with a linear sweep from DC to 10Hz, followed by a logarithmic sweep from there to the end frequency. This signal is selected automatically to make sweep measurements.
Again... SpecLab is a tool for analyzing audio and audio files to millihertz resolution. I focus on DC to 120 Hz. Look at any of my SCs from SL and you'll see my systems roll off precisely reflected, not 20dB bumped below 4 Hz or whatever.
We are not analyzing measurement sine sweeps, pink noise, white noise or tone burst noise. We are analyzing audio files in various formats, showing a waterfall, peak hold trace, average trace and amplitude waveform. The results precisely correlate with a REW in-room FR measurement as I've shown many times sin the past.
The energy is encoded on the disc and is reflected in my systems reaction to that data when it is converted to analog and fed to my subs. It is certainly not -12dB lower than SL analysis shows. Bring your ported sub over and I'll prove it.