DIY Audio Test DVD - Page 4 - AVS Forum
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post #91 of 300 Old 01-19-2007, 05:54 AM
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Originally Posted by Jimmer2 View Post

bump... ;-)

ok......"Jim"
Jimbo....
The "Jimster"....
"Jim crack corn, and I don't care"....




God, I love that commercial!
http://www.youtube.com/watch?v=XqeMZh1WJs4
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post #92 of 300 Old 01-24-2007, 08:20 PM - Thread Starter
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We are in the home stretch.

I just burned the first completed beta disk.

Now I have to go through and make sure everything is in the right place, and is at the right SPL. This will take a few more ( wifeless ) days. Then all I have to do is fix the errors (with several hundred options there is bound to be a few) and render the final cut.

Two weeks maybe?

I might need to go ahead and hit up swithey.
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post #93 of 300 Old 01-25-2007, 07:30 AM
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Hurrah! You rule, man.
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post #94 of 300 Old 01-25-2007, 02:22 PM - Thread Starter
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This is why it is taking so long.

The beta disk worked fine on my computer last night. I get home today ready to toss it into the DVD player, and it doesn't work. There is no way to get to the menu. It just starts off with a 20-200hz FL sweep, you can skip through about 8 other tests and that is it.

I went through and double checked all the settings and tweaked a few, and I'm in the process of burning another right now.

Wonderful.

Hope I screwed the burn up last night, and haven't found another menu limit.
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post #95 of 300 Old 01-26-2007, 04:01 AM
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I´d like to contribute to this in some way. If you put this on BT ill commit to upload a minimum of 20Gb in the first week.
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post #96 of 300 Old 01-31-2007, 05:01 PM - Thread Starter
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It is confirmed. I hit another limit.

I'm going to have to go back to the 2.0 side and cut some menu levels to make room for all the rest of the 5.1 goodies.

The good news is I found another way to add the stereo stuff, so I'll only have to cut menu levels not content. The bad is that this pushes the completion date out again.


One thing I haven't asked about yet, DD levels. Avia and DVE are encoded with a -27db dialnorm setting. This means -20db from the DVD should play as 81db not 85db. This also means that DTS and non(+4)dialnorm DD DVDs are 4db hot. (109db peaks)

I have encoded everything at -31db (dialnorm off/+4), so that -20db is 85db and 0db is 105db.

This is the way I want it. If any of you would prefer a -27 dialnorm option let me know. ASAP
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post #97 of 300 Old 02-13-2007, 03:36 AM
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soho54: How is work coming along? Any ETA?
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post #98 of 300 Old 02-13-2007, 06:08 AM
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Quote:
Originally Posted by soho54 View Post

It is confirmed. I hit another limit.

I'm going to have to go back to the 2.0 side and cut some menu levels to make room for all the rest of the 5.1 goodies.

The good news is I found another way to add the stereo stuff, so I'll only have to cut menu levels not content. The bad is that this pushes the completion date out again.


One thing I haven't asked about yet, DD levels. Avia and DVE are encoded with a -27db dialnorm setting. This means -20db from the DVD should play as 81db not 85db. This also means that DTS and non(+4)dialnorm DD DVDs are 4db hot. (109db peaks)

I have encoded everything at -31db (dialnorm off/+4), so that -20db is 85db and 0db is 105db.

This is the way I want it. If any of you would prefer a -27 dialnorm option let me know. ASAP

Could you explain in more detail how the dialnorm setting is used by DD decoders to us ignoramuses? I was under the impression that this only comes in to play when the decoder is creating a 2.0 downmix from a 5.1 source, but I could very well be mistaken. Or was it something to do with dynamic range compression in night mode? Please explain!
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post #99 of 300 Old 02-13-2007, 08:00 AM - Thread Starter
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ETA? I'd rather not stick my foot in my mouth again.

Dialnorm? Hmmm...
Dialogue Normalization, Dynamic Range Control, and Downmixing are all separate DD metadata influenced parameters. They can influence one another, but Dialnorm is not effected by anything else. When engaging a Downmix DRC is affected, but not Dialnorm.

Dialnorm is supposed to be used normalize average volume from program to program. In movies this is mostly the dialogue, in say broadcast TV it is the average A-weighted loudness. IE, the loudness of people talking on a DD track in Click should be the same as Half Baked, or an HD NFL game. (notice the highlighted words.)

Dialnorm is indicated by a number from -31db to 0db at the encoder level. This number is chosen by where the average levels are at on a sound track. Bare with me a minute. Now the highest "volume" coded on a DD track is 0db. When played on say, the center channel you should get 105db on an SPL meter at your seat. This means -31db on the track plays back at 74db. A disk with a dialnorm of -31db has nothing done to it. (the ARV will say +4db, I'll get to this in a minute.) Now lets say you have a track with a normalized level of -21db. The DD decoder (AVR) will "turn down" everything by -10db to match the loudness to the chosen -31db level.

Now Dolby set the the default levels for home equipment as -27db. This is why you get +4db on you AVR with a -31db dialnorm, and nothing indicated at -27db. They wanted the option of boosting a track if one needed it. This is going to screw a few brains, but nothing is being done to the signal when it says +4db, and at anything other than than that the volume is being decreased. This is why it is said that DTS is 4db hotter than DD. It really isn't. Most DD disks are just retarded a few dbs by default.

This is why I am going with -31db. This will set the correct max setting for DD and DTS. It's really no big deal, just preference.

Disclaimer-This is not gospel, just something I threw together off the top of my head at work. Check out Dolbys site for the real run down.
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post #100 of 300 Old 02-13-2007, 10:08 AM
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As long as you document your levels, your preference makes sense. We are just looking forward to testing your work out.

Mark
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post #101 of 300 Old 02-13-2007, 05:39 PM
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Thanks for the dialnorm explanation. I "get it" now.
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post #102 of 300 Old 02-15-2007, 02:03 PM
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soho54: As long as you some day will release this im happy. Ive got the behringer waiting for you disc. Oh, and thank you for creating this.
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post #103 of 300 Old 03-01-2007, 07:32 PM
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I'm eagerly awaiting this. Any progress to advise us on?
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post #104 of 300 Old 03-05-2007, 12:32 PM - Thread Starter
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I'm really sorry this is taking way longer than expected.

Every time I make headway, I have to go backwards are do it all over again. Between work and the wife's "you spend to much time on the computer" kick the last few months my actual window to work on the project has really almost closed.

That said, I do have an almost completed demo going now. The problem last month was that I have had to go back and pretty much start over. I had to change the default DVD disk audio codec, and redo how the 2.0 side accessed it's audio to get everything to work together on a stand alone DVD player. (It works great on any computer, but nothing else will play it correctly as it was.) Unfortunately this means that all the audio is now trans coding to the wrong levels. It doesn't make sense and shouldn't be happening, but it is. I am now going back through the waves and tweaking them to the same levels across the entire disk with the ac3 files as the base. Once I get the samples on the demo correct all that is left is correcting all the other waves and inserting them back into their correct places.

Once again, I'm very sorry for the wait. I really wanted to be done in Jan. Now March has shown up.
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post #105 of 300 Old 03-05-2007, 04:00 PM
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I for one, appreciate your effort and understand how hard it is to balance our complicated lives. Keep after it, and good luck.

Mark
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post #106 of 300 Old 03-05-2007, 05:48 PM
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soho,

It is your house that my lovely wife has been going to when she gets pissed at me for being on the computer. I believe that there is a gene which only wives have that rings some bell or other in their head whenever their hubbies start dabbling in some hobby or other.

Little do we know that computers, fishing rods, skis, golf clubs and the like are just another woman to our wives.

Looking forward to the five channel test tones.

Jerry the HT Nut
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post #107 of 300 Old 03-05-2007, 08:05 PM
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We are all patiently awaiting the finished product. Keep up the good work. I am sure it will be worth the wait and a valuable tool for all of us.

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post #108 of 300 Old 03-06-2007, 05:43 AM - Thread Starter
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Quote:


Little do we know that computers, fishing rods, skis, golf clubs and the like are just another woman to our wives.

As insane as this sounds it is exactly correct.

A couple of years ago I would have laughed this off as a joke. I few years married is a real eye opener. The funny thing is you can never convince them that there is no competition between them and whatever it is at the moment.
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post #109 of 300 Old 03-09-2007, 10:32 PM - Thread Starter
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Update

OK, as of right now my wife has a buisness trip scheduled starting on March 19th lasting 20 days. This means I get unlimited computer time, and this project is first on the list.
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post #110 of 300 Old 03-09-2007, 10:58 PM
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Wow! this is amazing! I'm a little confused about how I will be able to get this when it's complete, but I'm guessing the details will be hashed out when it actually comes down to time.

Bass IS the best...
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post #111 of 300 Old 03-10-2007, 05:00 AM
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Originally Posted by fretman4god View Post

Wow! this is amazing! I'm a little confused about how I will be able to get this when it's complete, but I'm guessing the details will be hashed out when it actually comes down to time.

Bittorent downloads, regular download in parts, paying Soho a few bills to mail a copy to you.
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post #112 of 300 Old 03-10-2007, 08:06 AM
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Originally Posted by fretman4god View Post

Wow! this is amazing! I'm a little confused about how I will be able to get this when it's complete, but I'm guessing the details will be hashed out when it actually comes down to time.

I plan to host it on my FTP site for everyone to download
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post #113 of 300 Old 03-13-2007, 08:43 AM
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I'd be willing to PayPal Donate him for a copy.

It's too loud when you're too old
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post #114 of 300 Old 03-13-2007, 02:47 PM
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Gladly make a donation as well.

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post #115 of 300 Old 03-13-2007, 05:22 PM
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Soho, could your wife take mine along, I need some speaker building time.

Jerry the HT Nut
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post #116 of 300 Old 03-13-2007, 10:16 PM
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sweet deal. Thanks for the info. I'm not even sure I know what an FTP site is, and how to get to one though...

Bass IS the best...
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post #117 of 300 Old 03-23-2007, 05:11 AM
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post #118 of 300 Old 03-29-2007, 03:48 PM
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From FTPplanet.com
"What is FTP?
FTP (File Transfer Protocol) is the simplest and most secure way to exchange files over the Internet. Whether you know it or not, you most likely use FTP all the time.
The most common use for FTP is to download files from the Internet. Because of this, FTP is the backbone of the MP3 music craze, and vital to most online auction and game enthusiasts. In addition, the ability to transfer files back-and-forth makes FTP essential for anyone creating a Web page, amateurs and professionals alike.

When downloading a file from the Internet you're actually transferring the file to your computer from another computer over the Internet. This is why the T (transfer) is in FTP. You may not know where the computer is that the file is coming from but you most likely know it's URL or Internet address.

An FTP address looks a lot like an HTTP, or Website, address except it uses the prefix ftp:// instead of http://."

So many ideas, so little money!
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post #119 of 300 Old 03-29-2007, 10:04 PM
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sweet. i can't wait!

Bass IS the best...
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post #120 of 300 Old 03-29-2007, 10:43 PM
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Quote:
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I'd be willing to PayPal Donate him for a copy.

Ditto...
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