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Post by henge on Aug 2, 2013 13:44:34 GMT -6
I can't remember where I was reading this but it was suggested that we dither every time there is a change in level. So let's say your rendering a track with a bunch of fx it was suggested that dither would clean up any quantization noise. Thoughts?
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Post by wiz on Aug 2, 2013 17:22:07 GMT -6
Dither and bit depth and sample rate discussions should be banned from this forum LOL.
There is a great white paper on digital audio written by Dan Lavry around somewhere and also Nikka Aldrich wrote a book about it.
There is also a post somewhere where my ass got handed to me (nicely) by George Massenburg and Nikka years ago on bit depth.
I think, in all honesty, do a bit of searching around rather than about the millonth time this has been asked. It nearly always ends in a giant shit fight.
If you really want to go down the path of understanding this, get back to me and I will go find the links to the material that I used to learn about this stuff and post it to you but be warned, it can get heavy going.
Or at least, rather than "i read something somewhere" post a direct link to the source material, and people can address it directly if they want in context of the accuracy of the statement you read.
Problem is, there is vauge understandings of this stuff, at best by the majority of people. Then also, now things are handled within plug ins and DAWS automatically, in some cases, that werent when articles were written.
I will say this. Categorically.
In every case I have heard presented, the difference between dither and no dither, it has been the least of the sonic issues in the example. Any time I have actually heard the effects of dither, I have had to crank the volume so loud on my monitors as for it to be a moot point (thats moot not moops 8) )for all intents and purposes.
cheers
Wiz
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Post by henge on Aug 2, 2013 17:26:34 GMT -6
Perfect. I tried some listening tests myself and it doesn't make a tellable difference to me! Never mind.
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Post by wiz on Aug 2, 2013 17:29:59 GMT -6
Hi Henge
glad you took it like that, I had posters remorse 8) after hitting enter...
In that I hope it came across well, and not like a dick head.
cheers
Wiz
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Post by henge on Aug 2, 2013 17:32:19 GMT -6
Lol! No problems.
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Post by Deleted on Aug 3, 2013 1:27:37 GMT -6
I can't remember where I was reading this but it was suggested that we dither every time there is a change in level. So let's say your rendering a track with a bunch of fx it was suggested that dither would clean up any quantization noise. Thoughts? Don't know who would suggest something like that. Leave alone dither until you export to the final bit depth. Leave everything else to the DAW. Normally, the DAW does the following (if it is nearly intelligently programmed...): Whenever a real quantization to lower bitdepth is done: Triangular Dither (TPDF), the only one recommended, if you will dither more than one time. This is maybe the case at freezing tracks etc. Then, when you export to final media bit depth: Use a noiseshaped dither, if you have one at hand... I use PowR-3. That's all. Most people seem to prefer the "Ozone"-dither iZotope MBIT+. Some freaks use even recorded analogue dither from Crane Song, they really sell an "analog dither CD". LOL. I have seen the noiseshaping curve somewhere, so i could do me a favour and "noiseshape" some white noise with the EQ to that curve and save me some bucks. LOL. I guess this is some of the audio babble you can discuss to death over at the "forum we should not mention" slut..s and everybody would tell you you are an idiot if you are not using MBit+. I would bet most of those discussing it could not tell an audible difference between freeware noiseshaping, preamp noise and the one they actually used on their own songs. Dither and it's discussion is seriously overrated. If you are a funny guy, just leave some preamp noisefloor in your tracks. May be sufficient as dither. lol. Make an ABX test, if you want to make sure. I guess, this would clear it up for you. Then you probably never think about that again. Best regards, Martin PS: I have been told "war" refuses to participate here. You have been warned. If you now write something completely different, i would probably never answer. Hehe.
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Post by henge on Aug 3, 2013 4:34:31 GMT -6
I did an abx and it was inconclusive.;-)
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Post by dubrichie on Aug 3, 2013 10:01:11 GMT -6
In modern DAWs and plugins, of decent quality, dither is applied automatically wherever it is necessary or "beneficial".
So, basically, don't worry about it.
If you're doing offline SRC or somesuch to digital audio files, and you are given the option by whatever software / process you are using, sure, use it.
But again, basically, don't worry about it.
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Post by scumbum on Aug 3, 2013 10:07:53 GMT -6
I was bouncing to disk a mix with Pro Tools LE which was recorded 24bit 48K , to a stereo track 24bit 48K to get Mastered , but the Mix didn't sound like the original playback of the PT session Mix . It was not as open , the bass and mids also suffered , like the mix imploded . Bob Olhsson pointed out in this thread , www.thewombforums.com/showthread.php?t=21029&page=4 , ""If you are using a TDM system, you need to swap the dithered mixer into your plug-ins folder or else every single plug-in will be truncated from 56 to 24 bits. If you are using a native or HDX system, you want to put something with 24 bit dither on the output. If you do all of that, the native will sound as good or better."" He was right ! It fixed the problem . I don't understand it , but you can read about it over there .
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Post by Deleted on Aug 3, 2013 11:05:44 GMT -6
Well, what does this tell us about, ehem, "Pro"-T.....? No comment. Some software does have these kind of settings implemented by default or even configurable in the system settings (with the most appropriate pre-configuration done). Well. Some. Maybe most. But not all. Obviously. Whatever does the trick...
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Post by Hudsonic on Aug 3, 2013 17:14:40 GMT -6
Dither management used to be taught and at one time was slavishly adhered to because of low quality daw engines. Now most people don't follow the old recommendations.
They were:
Whenever you do a "manipulation" on a signal, dither it. That means any level change, eq, edit, etc. If working at 24 bit you would set your daw to dither to 24 bit with your chosen dither---as mentioned often a straight triangular dither. This can be done by engaging a "global dither selection" in your daw and this is applied automatically (if you have it set to do it.) So each change is dithered.
Then, when knocking the mix down to 16 bit cd or to files, you use a noise shaped dither on the main out. There can be many instances of dither, hundreds or more, in a project. The result is a smoother sound. If your mic techniques picked up depth in the recording, these multiple dithers preserve the depth as well.
Everything matters more than dither in your production. But that does not mean that one should not know the best practices.
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