The Master List of DVD, HD-DVD & Blu-ray Movies with BASS Thread...With WaterFalls - Page 82 - AVS Forum
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Old 12-16-2008, 05:48 PM
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anyone see "the day the earth stood still" yet ?

that should be a pretty good bass movie perhaps

All this noise about noise.
♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫
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Old 12-16-2008, 08:06 PM
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The Mummy: Tomb of the Emperor on BlueRay.

So many scenes with great bass.
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Old 12-16-2008, 08:43 PM
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Quote:
Originally Posted by thirdeye11 View Post

First you need an SPL meter to calibrate your system. What most people do is buy a Radio Shack SPL meter. Then they run the "test tones" on their receiver. This will play a white noise test tone on each speaker. Use the SPL meter and the receiver's individual channel adjustments until the L, R, C, and surrounds as well as sub are all set to 75db. You do not need to adjust the volume on your receiver as test tones are always output at a standard volume level close to 75db. Most of the time you will need to make distance adjustments as well as level adjustments on each channel though to "normalize" everything to the same volume. This ensures proper volume from each channel and that you can get as close to the original source as the mixers intended.

Some people like to run their center channels "hot" (or louder than the rest of the channels) especially if their center channels are proving to be less than adequate and dialogue is unintelligible as compared to program material. Only do this if you feel you have to after even calibration at 75db on all channels.

Regarding the sub channel it can be potentially the biggest pain. There are many methods to sub "placement" but one way to do it is place the sub where you normally sit, then play material with very consistent bass (think My Name is Mud by Primus) throughout. Then "crawl" through the room and see what area (normally a corner) offers the best/most bass response. Place the sub there then calibrate it even with the other speakers. Most SPL meters are 2-3db "down" or low so if you calibrate the sub channel at 75db on the SPL meter you are probably at 77 or 78db already or 2-3db hot as compared to mains. Some like to run this as high as 80db (or 7-8db hot compared to mains) but I'd experiment at 75db first and see what you think.

There is plenty of recommended reading on the subject, but this will get you started.

After you've calibrated "reference level" will be 00 on your receiver's volume knob if you have the type that starts around -60 and goes up from there. This is the absolute loudest most anyone would listen at, but most of us listen anywhere from -05 to -15 as our reference level.

-Chad

you are the man, thank you so much. I will give it a try.
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Old 12-16-2008, 09:49 PM
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I agree about the Mummy 3, Lots of bass. That avalanche scene was incredible.

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Old 12-17-2008, 02:00 AM
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Quote:
Originally Posted by allredp View Post

Cool--I concur about the blindfolded point, though on the machine gun in the lab I could tell a difference in my seat (lower infrasonics) on the True HD.

Thanks for the comps...

Can we get some waterfalls from that lab scene? Mrkazador, any one else??
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Old 12-17-2008, 06:25 AM
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Quote:
Originally Posted by otk View Post

anyone see "the day the earth stood still" yet ?

that should be a pretty good bass movie perhaps

I saw it last Friday at Imax. The sound was great with excellent bass. The movie overall, ehhhh.
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Old 12-17-2008, 09:52 AM
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Old 12-17-2008, 10:33 AM
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Quote:
Originally Posted by mojomike View Post

I saw it last Friday at Imax. The sound was great with excellent bass. The movie overall, ehhhh.

cool, thanks

All this noise about noise.
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Old 12-17-2008, 02:23 PM
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Quote:
Originally Posted by Mrkazador View Post

00:56:46


You da man! That scene sound killer with the Ultras.
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Old 12-17-2008, 02:27 PM
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I love that scene. Talk about pressurization with punch. I have to measure to see what I am hitting.
Looking at that graph, for the best experience your mains need to match your subs for output

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Old 12-17-2008, 02:50 PM
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thanks mrkazador.
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Old 12-17-2008, 03:17 PM
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Quote:
Originally Posted by Mrkazador View Post

00:56:46


What I think makes this scene so great for properly tuned systems is that there is really three mains parts to the bass and each shot.

1. You have 120-130hz energy coming from your mains

2. You have 45-55hz punches coming from your sub WHILE...

3. You have subsonic energy from about 18hz-40hz to go along with it


That trio of bass is really something in that scene, and you better have some good mains, and a sub that can handle all that range and handle it quickly and deeply!


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Old 12-17-2008, 03:19 PM
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Quote:
Originally Posted by bgillyjcu View Post

What I think makes this scene so great for properly tuned systems is that there is really three mains parts to the bass and each shot.

1. You have 120-130hz energy coming from your mains

2. You have 45-55hz punches coming from your sub WHILE...

3. You have subsonic energy from about 18hz-40hz to go along with it


That trio of bass is really something in that scene, and you better have some good mains, and a sub that can handle all that range and handle it quickly and deeply!


Honestly, my little Polks handle it very well. The Ultras do it to it...
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Old 12-17-2008, 03:24 PM
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^What is that scene from? I can't find mention of the title.
TIA

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Old 12-17-2008, 03:25 PM
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Quote:
Originally Posted by Smarty-pants View Post

^What is that scene from? I can't find mention of the title.
TIA

Dark Knight, machine gun testing. It's around 56 min into the movie.
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Old 12-17-2008, 03:30 PM
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Quote:
Originally Posted by croseiv View Post

Dark Knight, machine gun testing. It's around 56 min into the movie.

thanks.
I havn't been able to watch TDK yet, but maybe I'll trow it in tonight and chack that scene out.

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Old 12-17-2008, 04:57 PM
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that scene rocks lol! deff played it a couple of times seeing how far i could push it...makes ur hair stand up! that and the underground chase both kick some serious butt!

thanks for the waterfalls!!
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Old 12-17-2008, 10:11 PM
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Yeah, great waterfalls! Thanks much MrKazador.

My Dali Mentor 8's (dual 8" woofers & 6.5" mids) really crank that scene crossed at 50hz, while the SVS PB13U shudders and shakes the bottom-end so impressively.

Great hobby, eh?!

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Old 12-19-2008, 09:19 PM
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Just a question...

If Dolby reference level is 105dB for l/c/r/surround channels, and 115dB for LFE, shouldn't those gunshots in the graph be in the 95-100dB range if played through a system at reference level (if dark red is around -20 dBFS)?

JSS
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Old 12-19-2008, 09:59 PM
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Quote:
Originally Posted by maxmercy View Post

Just a question...

If Dolby reference level is 105dB for l/c/r/surround channels, and 115dB for LFE, shouldn't those gunshots in the graph be in the 95-100dB range if played through a system at reference level (if dark red is around -20 dBFS)?

JSS

Something I've been wondering myself. Here is how I take those graphs...

Extract DTS/AC3 from movie.
Create a graph with graphedit; DTS-> AC3Filter(Redirected bass)-> Wavdest-> FileWriter-> Output.wav
Load the wav in SoundForge and cut the LFE track.
Paste the LFE track into the left channel of a new 2 channel track.
Set my soundcard's recording device to Stereo Mixer.
Playback the LFE track and plot waterfall.

Doing it this way is better because my soundcard's line-in is not flat, it rolls off below 20hz according to REW. Stereo Mixer is PERFECTLY flat. A lengthy process but I think is the most accurate.
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Old 12-20-2008, 01:43 AM
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Quote:
Originally Posted by maxmercy View Post

Just a question...

If Dolby reference level is 105dB for l/c/r/surround channels, and 115dB for LFE, shouldn't those gunshots in the graph be in the 95-100dB range if played through a system at reference level (if dark red is around -20 dBFS)?

JSS

The dBSPL of 105dB peaks for the sats and 115dB for the LFE are the measure of total sound pressure level, which is additive.

At any given instant on the posted waterfalls, all the sound must be added to equal the peak reading in dBSPL.

Since LFE are combinations of real recorded events mixed with synthed sounds in complex combinations and are a 4,5 or more octave spread of frequencies, in order to have a total of all of the frequencies add up to 115dB at 0dBFS playback, no one frequency can be encoded at 0dBFS.

Some soundtracks have effects that are encoded above 0dBFS and therefore will exceed 115dB when playing them at reference level, which is why they're referred to as being 'hot' soundtracks, but it's relatively rare.

LFE displays on the waterfall graphs as primary or fundamental frequencies showing up as larger spots encoded at -10 to -15dBFS. The rest of the frequencies of the effect are encoded lower so that they all add up to 0dBFS when played back when everything is mixed properly and encoded on the disc, and your system is flat and calibrated.

Bosso
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Old 12-20-2008, 08:44 AM
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"The dBSPL of 105dB peaks for the sats and 115dB for the LFE are the measure of total sound pressure level, which is additive."

I was under the impression that the 105dB number meant that each l/c/r/surround channel should be able to deliver 105dB SPL peaks at the listening position, and not a sum of all the channels. Each channel is calibrated by pink noise set at -20.0 dBFS, giving an SPL/RTA reading of 85dB in the middle of a theater, and that the LFE track with band-limited pink noise at -20.0 dBFS should give an SPL/RTA level of 95dB in the middle of the theater, but I may be wrong...

"At any given instant on the posted waterfalls, all the sound must be added to equal the peak reading in dBSPL."

How can we do this addition by looking at the waterfalls to come up with a peak SPL level? Is there a function in Speclab to do so?

Which brings up another question. If speaker-level calibrations are done with a -20.0 dBFS pink noise signal that should read 85dB SPL, does this mean that the individual frequencies in the pink noise spectrum are actually at less than -20.0 dBFS, but that the sum of all the frequencies in the pink noise will equal -20.0 dBFS? I'm confused...

JSS
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Old 12-20-2008, 09:55 AM
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Quote:
Originally Posted by maxmercy View Post

"The dBSPL of 105dB peaks for the sats and 115dB for the LFE are the measure of total sound pressure level, which is additive."

I was under the impression that the 105dB number meant that each l/c/r/surround channel should be able to deliver 105dB SPL peaks at the listening position, and not a sum of all the channels.

JSS

This is correct. The LFE peak is 115 dB.
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Old 12-20-2008, 11:20 AM
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Bosso was not talking about your speakers, or their level at all though. He's refering to the actual sound mix encoded in the tracks. The sum total of all of the energy in the track at any given time is equal or less than the potential 0dbfs (roughly 115db sw output w calibration) in the LFE track. So that just because there is a large red blob on one of the waterfalls indicated a -20db level does not mean that you should be getting 95db when calibrated and listening at REF level. All of the rest of the energy in the track also adds to the signal strength there, so you really can't look at things like that.
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Old 12-20-2008, 08:51 PM
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Quote:
Originally Posted by Mrkazador View Post

Horton.Hears.a.Who!.2008.720p.BluRay.DTS.x264
AC3Filter: 120hz redirected bass

00:01:05 - 00:02:20
I don't know what you call it, that "spikey" ball rolling on the ground. Click thumbnail for larger image.

u definately aren't from the south! Those fall like acorns!

YEP! It has some good bass in there!
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Old 12-20-2008, 08:56 PM
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Quote:
Originally Posted by croseiv View Post

Yeah. I really enjoyed this one! It has some pretty good LFE throughout.

most posts on Wall*E have stated the opposite..

overall a good summer for LFE/bass movies!!
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Old 12-21-2008, 05:23 PM
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Kung.Fu.Hustle.2004.720p.BluRay.DTS.x264
AC3Filter: 120hz Redirected Bass

00:05:23


00:19:35


01:08:33


01:14:13


01:31:01
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Old 12-23-2008, 09:28 AM
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Traitor had some suprisingly good bass moments! there were some nice explosions, but it really was how they used bass throughout the music and different scenes that was awesome! reminded me a lot of how hitman uses the bass. good movie too!
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Old 12-23-2008, 10:36 AM
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+1 on Traitor. Even the opening music pounded mid-bass well.

There's wasn't anything mind-blowing, but it was decent. Reminded me of Bourne Supremacy--nice mid-bass and a few decent explosions.

Anxious to try out Hellboy II considering previous posts...

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Old 12-26-2008, 07:33 AM
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Watching HHW on blue ray! Two thumbs up for the opening LFE!!!
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