Originally Posted by MKtheater
Bringing back an old thread here. BTW, those speclab graphs show that there was lots of low stuff still missing from TIH from the digital graph so imagine that 12 out 14 people knew it played lower now add in the rest of the low end and at much higher levels to get the full digital accurate playback and you guys would not think twice about which is better
Top graph is Ironhead's cap of the SMs. His scroll speed isn't properly synced with his resolution and I can't tell what's up with the waveform (amplitude graph on the right), but the FR is still reflected in the graph.
Middle graph is Beast's 8x18" system mic'd
Bottom graph is the signal fed into SL from the SW out jack.
Beast's system has a signal chain that rolls off fairly aggressively below 10 Hz but he still captures the essence of the Hulk scene quite well. He's perfect to around 12 Hz, -5dB @ 10 Hz and -6-8dB from there to 6 Hz, the heart of the scene's ULF hit.
The Ironhead cap shows the bump in response between 20-23 Hz and the dip @ 35 Hz but rolls off <20 Hz and gives not much <10 Hz with the 6 Hz hit pretty much missing from the reproduction. The listener's appear to have been reacting to the area around 10-20 Hz that's missing from the presentation with the HPF.
Mark has argued against my stance that the limiters change the FR at high level playback, but my position is unchanged. I believe the difference between the posted FR (averaged) and the response evident in the SL cap is a bit of sig chain but mostly limiters kicking in.
At my GTG later this summer I hope to show this limiter-induced FR change more accurately.
I agree with you, James. Accurate to 5 Hz in this scene at reference level is unmistakable and the whole difference in the presentation. After playing it a gozillion times it still unnerves me a bit. If the listeners ever get the chance to truly A/B these sorts of scenes, I'm sure the result will be as my similar tests have always resulted.