EQ of the X curve

[Tomlinson Holman]

What would be interesting is to compare the spectrum of a movie soundtrack for cinema and the same of a blu-ray to see if any filtering was applied to compensate the x curve.

I'm not an audio expert, but you seems so; why don't you get a project that includes a Cinema DTS track, make the comparison, and write your conclusions here? It could be useful for the whole community.

I will do this, when nobody else has done this so far. This weekend I am on a festival, but on the next weekend I hope to find some time to do that.
Ideally this should be done for different studios, to check if they handle this differently. But of cause this would take some time.

I would appreciate if somebody from this board who is experienced in audiostuff would give his opinion on that.

[spoRv]

Thanks, can't wait to read something about this.

A small note: please leave the quote before your answer, to improve readibility; thanks!

[Jetrell Fo]

As most everyone here knows, we don't just start handing things out to new members without any participation happening first. At this point, I do not know what to make of this, and I believe the language barrier might be part of it. I'm glad discussion is going on but I will say I did not appreciate Tomlinson maybe expecting I was just going to full his personal requests (again, it could be language barrier). My time and resources are worth just as much as anyone elses here and what we do helps the community, I won't do private requests, ever.  I sent him the Spider Man Wav64 files and the cinema DTS in their original .aud form for experimentation.

I'm not trying to be a jerk, I just wanted to be transparent about this, because I like this being a safe place for all like-minded people with the same intentions as ours.

Hello!

I am very disapointed, that you drag something which was discussed privat into this public part of the board.
Leaving 90 % of the hole story away makes me appear in a very bad way, like I just want something from here and not willing to give anything back.
Those who have been involved how I came here and you will know the true story.
In addition your text does not have to do anything with the discussion here of the x curve.

What I discussed with you is something I've discussed with most everyone. For me, there is no exception when it comes to the safety and security of this site, and it's members. If that is an issue for anyone, they may come to me privately or publicly, or ask that I be removed.

There is an etiquette here and it isn't just signing up to jump right in, for all new members, regardless of what you've discussed with anyone outside of here. Your contact with me before taking time to let folks get to know probably has a lot to do with this. I did adjust my previous post as well. I don't know you even if a few others do. I don't even know what others you refer to aside from sporv. My point is this, had you explained yourself fully before asking for stuff, I wouldn't feel so awkward about this. I'm not a mind reader and I'm not a German speaking native but I am patient if you're willing to get your point and intent across clearly.

That being said, I hope your experimentation with the Spiderman cinema DTS is going well, I'm interested to see what kind of things you find.

[Tomlinson Holman]

Yesterday I had some time and compared the spectrum of a blu-ray track with a cinema track.
I compared some scenes and the hole average spectrum of the movie.
To my surprise they were exactly the same, which means that no x curve correction has been applied.
I will do this for different studios, therefore this is just the first one. I decided to not mention the titles and studios, to not blame any that they are not doing their work properly.
If they are all the same, it does not matter any way.
Please keep in mind, that this does not mean, that the blu-ray track is the same as the cinema track, things like dynamic etc. could still the different.

[spoRv]

That sounds interesting; may you add spectrum images?

About titles and studios: mention, mention them, without problems... doing this doesn't mean you blame studios, by the way; it would be just a further information that could be useful for someone.

[Jetrell Fo]

https://www.gearslutz.com/board/post-pro...curve.html

http://www.hometheatershack.com/forums/r...eater.html

http://www.film-tech.com/ubb/f1/t008286.html

http://hometheaterhifi.com/volume_9_2/fe...-2002.html

http://www.hometheatershack.com/forums/r...overy.html

http://www.hometheatershack.com/forums/r...ow-do.html

https://www.smpte.org/sites/default/file...0Curve.pdf

A commonly misunderstood tool in cinema sound is the X-Curve. The very name suggests it has something to do with equalization of the sound track. In fact, it has nothing to do with soundfield equalization. Far from it, X-Curve describes a measurement method designed to allow the setup of a cinema sound system to match the sound heard by the director in the mixing room.

[spoRv]

Interchangeability of X curve material with home video can be handled with a simple re-equalization. The ATSC television standard recognizes the differences, sending a flag that tells receiving equipment whether the program material was balanced on an X curve monitor, or on a flat monitor in a small room, and home equipment can take appropriate action to re-equalize the program accordingly.

taken here: http://georgiahilton.webs.com/apps/blog/...he-x-curve
So, is this X curve an equalization curve or not?

[Tomlinson Holman]

The X Curve is a target for speaker in room response of cinemas and therefore rooms which mix sound for cinemas as well.
The link from AES I posted explains the X Curve quite well.

If you listen to the same material on a setup with the x curve (for example a cinema) it will sound different then listening to on a system
with a flat response (for example neutral hifi speakers in a good room).

The question of this topic is to see wether or not this is taken into acount when doing a home mix.

[Jetrell Fo]

Interchangeability of X curve material with home video can be handled with a simple re-equalization. The ATSC television standard recognizes the differences, sending a flag that tells receiving equipment whether the program material was balanced on an X curve monitor, or on a flat monitor in a small room, and home equipment can take appropriate action to re-equalize the program accordingly.

taken here: http://georgiahilton.webs.com/apps/blog/...he-x-curve
So, is this X curve an equalization curve or not?

It is not. It is measurement designed for use in cinemas to replicate how the audio is heard in a mixing room.

[Jetrell Fo]

https://www.gearslutz.com/board/post-pro...s-etc.html

http://audiosciencereview.com/forum/inde...-curve.10/