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Ariane with 8100& XT2 or Broadcast Warehouse DSP-Xtra

David Reaves said:
Hi Cornelius!

I agree with your concept of where to place (or not place) the units. And I agree that there's little need for an AGC to 'protect' a linear digital STL.

However I'm not so sure about the idea that an external AGC's purpose is *necessarily* to create a sound or effect.

We regularly receive email from Ariane users positively commenting on how *little* effect it adds, especially when contrasted with competing systems.
Which was the design goal. ;)

Personally I think any AGC (internal or external) serves best when it *transparently* allows the final processor to operate in its sweet spot, making the final processor's desired effect (whatever that may be) more consistent and predictable.

Kind Regards,
David

Hi, David!

In my book, by your definition, your AGC is being used to achieve a signature sound! That falls under my "effect" category, as it is creating one. There is a difference in my murky little mind between 'effects' and 'artifacts'...

;)

There are other folks out there who use AGC's to deliberately create pumping artifacts that modern processors generally do not do. Why anyone would want that? Who knows, but there are folks out there who do!

-Cornelius
 
Cornelius,

I generally agree, but you do need to keep in mind dynamic range - for digital that means resolution. If you feed a 16 bit STL from a 24 bit mixer this could be a problem.

I have worked with a number of customers who find the gentle near-lossless bit reduction of enhanced apt-X to be well worth it to get full 24 bit resolution on an STL feeding a TX-located processor. A perfect example is the fact that with E apt-X you can fit a 48 kHz 24 bit audio on a T1 with room left over.

To the Original Poster,

If you are considering keeping the 8100 XT when is the last time it had a full going over (caps replaced, calibration, etc).

One real concern with analog is the slow but steady degradation that may not be overtly noticed, but could be causing discontent with performance. If you pay someone to do this it is not cheap, but it is a necessary thing to do if you wish to stay with an analog processor.

Good day

Rolf Taylor

Applications/Support Engineer

APT North America

www.aptx.com

cgould said:
And don't forget that if you are running a pure digital path (AES from the studio, directly into a digital STL preferably LINEAR),
then you do not need any kind of leveler as this setup is as good as having the processor at the studio.

Why no need for a leveler? Full scale zero is full scale zero!
If you run out of bits on the console, then you run out of bits everywhere...including the the leveler!

Now, if you're looking for an effect that the outboard AGC / leveler can provide
(i.e. a signature sound thing) then go ahead and use the AGC / leveler.

-Cornelius
 
cgould said:
David Reaves said:
Hi Cornelius!

I agree with your concept of where to place (or not place) the units. And I agree that there's little need for an AGC to 'protect' a linear digital STL.

However I'm not so sure about the idea that an external AGC's purpose is *necessarily* to create a sound or effect.

We regularly receive email from Ariane users positively commenting on how *little* effect it adds, especially when contrasted with competing systems.
Which was the design goal. ;)

Personally I think any AGC (internal or external) serves best when it *transparently* allows the final processor to operate in its sweet spot, making the final processor's desired effect (whatever that may be) more consistent and predictable.

Kind Regards,
David

Hi, David!

In my book, by your definition, your AGC is being used to achieve a signature sound! That falls under my "effect" category, as it is creating one. There is a difference in my murky little mind between 'effects' and 'artifacts'...

;)

I don't quite follow how sounding identical to the original can be considered an "effect." ;)

On second thought, perhaps in today's processing world where that is NOT the norm, it could be considered so!....


Kind Regards,
David
 
Rolf:

Yes...technically, you can have a loss of very low level detail if you are going from 24 bit console to 16 bit STL, but would it be any worse than the commercially available pre-recorded sources feeding the 24 bit console (which is typically 16 bits anyway)?

Not a question for you to answer, necessarily...just a facility judgment call that depends on the situation(s) at hand..

In any case, an AGC can help to keep that really low level detail above the quantization noise of a 16 bit system. Better yet, instead of a band-aid like that just match the STL to the source...as your customers with good engineering practices have done.

If you match the sources chain to be of equal capability, then yes, you will get optimum performance. Same as in analog!

That's just called good engineering practices!

-C
 
David Reaves said:
I don't quite follow how sounding identical to the original can be considered an "effect." ;)

On second thought, perhaps in today's processing world where that is NOT the norm, it could be considered so!....


Kind Regards,
David

Aaaah... but if it really IS identical and transparent to the source, then what would be the purpose of using the unit? Even if it is doing subtle gain riding, and some subtle spectral balance then it's doing SOMETHING, which is an effect of some kind!

;-)

In audio processing, we're ALL distorting the audio characteristics in one way or another. If not with clippers, then we're distorting the dynamics in some desirable way to dynamically squeeze the audio fit an optimal range for a particular application.

That makes these units, by their nature, not transparent. They can be subtle to the ear, and not very perceptible by the humans without an A/B comparison, which is what you mean by transparent. But the effect the unit has on the audio is obvious enough that people buy it, and use it in their air chain! That is where I come from! :)

If it truly did nothing, then there would be no point to spending money on it!
;) ;) ;)

Happy Friday, David

It's always fun chatting with you!

Regards,
-Cornelius
 
cgould said:
David Reaves said:
I don't quite follow how sounding identical to the original can be considered an "effect." ;)

On second thought, perhaps in today's processing world where that is NOT the norm, it could be considered so!....


Kind Regards,
David

Aaaah... but if it really IS identical and transparent to the source, then what would be the purpose of using the unit? Even if it is doing subtle gain riding, and some subtle spectral balance then it's doing SOMETHING, which is an effect of some kind!

;-)

In audio processing, we're ALL distorting the audio characteristics in one way or another. If not with clippers, then we're distorting the dynamics in some desirable way to dynamically squeeze the audio fit an optimal range for a particular application.

That makes these units, by their nature, not transparent. They can be subtle to the ear, and not very perceptible by the humans without an A/B comparison, which is what you mean by transparent. But the effect the unit has on the audio is obvious enough that people buy it, and use it in their air chain! That is where I come from! :)

If it truly did nothing, then there would be no point to spending money on it!
;) ;) ;)

Happy Friday, David

It's always fun chatting with you!

Regards,
-Cornelius

Cornelius,

I think we have a bit of a semantic disagreement going on here. I believe you are defining 'effect' as "any change to the original that a processor makes."
Under that definition, since yes, an Ariane sometimes makes changes, there is (shudder!!) an effect.

I, however, am describing "effect" more narrowly, as "any change to the original that a processor makes that can be heard as it happens" (IOW, "audible effect")

I also separate "function" from "effect." Function is what is intended (desired). Effect is what is heard (may or may not be desired).

The Ariane is an attempt to create the AGC function with as little audible effect as possible. Often, none.

I gave an NAB presentation a couple of years ago called "Separating Processing from its Effects." I don't know if you were there or not. The paper is online at <http://www.translantech.com/NAB2006/Separating_Processing.htm> if you want to see where I'm coming from.

In my talk I discussed multiple aspects of human hearing that can be taken advantage of, to design ways to make automatic adjustments that are as sonically unnoticeable as possible. In other words, using technology to run processing algorithms that, while powerfully performing the desired functions, simultaneously steer AWAY from the idea of "effect." I'm sure you and many other engineers have considered the same thing. The difference is that one of our main techniques is to **aggressively seek opportunities to stop the process completely whenever possible,** a concept that results in letting the original material through unprocessed on a regular basis.

My thought is that if you can process without being noticed, there is, in effect, NO effect.

Or to put it more precisely, which I think is where you're headed, such little effect that it can be all but completely disregarded strictly as any audible effect (which, remember, may or may not be desired), but more as its pure control function. The processor is doing a lot, but going to great lengths to avoid making any action that is known to be audible, by removing dynamic action from the equation altogether, whenever possible.

Yes, sometimes you can hear a change when you press the A-B switch on an Ariane but as I said to one customer, if that's a problem, I promise to never tell your listeners where that switch is. :D


When all is said and done, keep in mind that roughly 90% of the time (depending on settings and material) the Ariane is doing **nothing.** It is VERY hard to hear the effect of "nothing."
;)

Kind Regards,
David
 
The Ariane is as close to a free lunch as you can get in an AGC. While others may claim different, the Ariane is leaps and bounds better than the front end of most digital boxes. It is sad when you pay $13,000 for a big box and it's only 2/3 complete ;)
 
Good morning!

Yes...I totally understand where you're coming from...and the difference is in how we define "effect".

I agree with what your theory is, and it mirrors my taste in pre-processing in many ways.

You are correct in that my view is defined as *any* change in the audio -- and that isn't a bad thing
by any stretch of the imagination -- otherwise I'd be insane to spend so much of my life in this field :).

We both are after the same thing, (as well as Frank Foti, and I'm sure Bob Orban) and we all have our
ideas on how to get there!

If we all saw the world the same way, it'd be a boring place, for sure!!!

Happy Friday!
-Cornelius
 
PaulyBoy said:
Sure sums up the box from Vorsis.

Actually I was referring to the "push down" AGC in brand X and the "where am I?" AGC in brand Y.

The AGC in the Vorsis has some neat tricks that make it much better than the other AGC's in the other box. Another good AGC is the one in the Audemat box.
 
COULD NOT AGREE MORE!!!!:



"The Ariane is as close to a free lunch as you can get in an AGC. While others may claim different, the Ariane is leaps and bounds better than the front end of most digital boxes. It is sad when you pay $13,000 for a big box and it's only 2/3 complete"
 
As much as I love the 8100, I think we're beyond the point of using it as a primary box. As is the case with any old gear, parts eventually become scarce. Additionally, I suspect most engineers today are becoming familiar with digital, that trained folks for analog gear are becoming rare.

Having said that, anyone know a good analog repair shop for some old gear? ;D Sorry to sidetrack this, but I have some old babies in need of attention. By old, I mean Otari open reel and a couple of cart machines (BE and ITC). ;)
 
wgliradio said:
Actually I was referring to the "push down" AGC in brand X and the "where am I?" AGC in brand Y.

You really mean brand "O" and brand "O", right? ;)

I'm going to slightly disagree with Mike here... Having tried different AGCs in front of different processors (including both O and O) in the end I personally always ended up with the built-in AGC giving me the best results. The outboard AGC will give you a different touch than the stock processor and if you're looking to be slightly different than the guy using the same box, it's a good way to go. Some outboard AGCs even do a better job of keeping the level consistent than what's in the box. However I always felt I lost some of the "lush", excitement and felt the outboard AGC restricted the full sound a processor can give at a given instant, than what you get with the built-in AGC. It takes couple of months using the processor with the outboard AGC and than stock to really appreciate that difference.

The thing is the designer integrated the AGC closely to the rest of the dynamic processing to complement each other and give the final sound the designer was looking for. That was my opinion (from experience) before, and now programming these algorithms myself I can tell you that it is really crucial to integrate AGCs with the limiters carefully, if you want smooth, consistent sound and get the most out of your compressors/limiters/clippers 100% of the time.

It's hard than to remove that AGC and put another and still keep that "chemistry", that just right amount of energy exchange between the AGC and the rest of dynamics processing and make it all dynamically play together as well.

It can often sound better IMO to keep the built-in AGC active even if you are adding an out-board AGC, IF you can keep them from fighting one another and not loose too much "life" in sound in the process...

The best solution is of course to store your music consistently levelled (normalized) at the same average loudness level. Most of the processors will then handle the usual level variations with ease, and you will sound better than with adding any out-board AGCs/leveller and having your source levels all over the place. Here you are sort-of trying to fix the consequence and not the cause.

Anyway, that's just my opinion...


Regards,
Goran Tomas
 
Sgeirk said:
COULD NOT AGREE MORE!!!!:

"The Ariane is as close to a free lunch as you can get in an AGC. While others may claim different, the Ariane is leaps and bounds better than the front end of most digital boxes. It is sad when you pay $13,000 for a big box and it's only 2/3 complete"

I guess that makes DSPXtra the only fully complete, 3/3 processors out there! ;)


Regard,s
Goran Tomas
 
So,does that make your new Extreme processor a 2/3 since it does not have the Ariane? (whoops)..Now your post before this one,in particular the last paragraph, makes alot more sense .Keep rockin..
 
menotti1 said:
So,does that make your new Extreme processor a 2/3 since it does not have the Ariane? (whoops)..Now your post before this one makes alot more sense .Keep rockin..

Well that would follow from Mike's and Sgeirk's replies... ;) But notice the winks ;)


Regards,
Goran Tomas
 
yeah,i noticed that weak ass wink,but Goran you need to be MORE professional in your approach.After all, you are a pro
working for a great company.i have no problem with the ariane.But it is not in your extreme and why should it be if you have better algo's.I sure don;t have any AGC issues with the 6EXI.Most users of the ariane is pre-processing before STL's.But O and O must be doing something right.look at the sales tracks.Really, please try to elevate yourself above some of this petty crap.
 
I have to disagree with Goran about using the built-in AGC's. Goran, have you ever heard what the 8200's AGC does on say Dreams by Fleetwood Mac? That really loud cymbal crash near the end of the song plays havoc with the 8200's AGC. Disabling the 8200's AGC and inserting a Compellor in front of the 8200 resolved this.

In regards to normalizing audio file levels, that doesn 't always work with wide dynamic range material, especially with music that was released before the hyper-compression age began. A lot of pre-1990's music has lots of dynamic range, and you need an AGC to handle this.
 
Well,i would agree with both of you.the 8200 is a much older box and platforms and codes have come along way since then.the 8500 seems to have solved some the prior AGC issues that some orban users experienced.Now i don;t have any thing against external AGC's and if using one it would be an ariane.i used a compellor YEARS ago with the omnia 3.But have no issues with the 6EXI.But this whole thing is a judgement call.if one is not pleased with the internal agc,then go with an external.Just don;t sell yourself short by not having the internal agc set for it's best performance.
 
menotti1 said:
yeah,i noticed that weak ass wink,but Goran you need to be MORE professional in your approach.After all, you are a pro
working for a great company.i have no problem with the ariane.But it is not in your extreme and why should it be if you have better algo's.I sure don;t have any AGC issues with the 6EXI.Most users of the ariane is pre-processing before STL's.But O and O must be doing something right.look at the sales tracks.Really, please try to elevate yourself above some of this petty crap.

It looks I didn't get the message across right... :( The point should have been if you follow Mike's and Sgeirk's opinions, DPSXtra is the only fully equipped processor. As we all know that is not true (not taking anything away from DSPXtra and it's performance; or Ariane's) it's obviously never that clear cut. As I tried to elaborate more in the other post....

Be assured that DSPXtreme has a very capable and consistent wide-ranging window-gated multi-band AGC. Or better yet, try it! Plus we have a few more ideas to bring to the levelling table.


Regards,
Goran Tomas
 
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