Differences between ac3 sound conformity

I saved on my Server a different sorts of ac3 "native" assets sound tracks.
That's means that I don't create it using a proper software.
All audio tracks playing normally on encore 1.5 and I can normally burn and hear on DVD stand alone, but after upgrade on version 2.0, lot of these tracks don't give any sort of sound.
What are the main conforming features of an AC3 audio track?
Do you know a software who can edit and conforming this?
Thanks

sorry but is the first time I hear this... Do you mean "Encore conforms ac3 audio tracks? " It's strange because when I import the audio stream no operation will start and cpu is at zero.
I cannot hear sound.
Please refine your precious info

Similar Messages

Big Volume Difference Between Menu Sound and Movie Sound

I transferred an iMovie Project to iDVD the normal way, then made a DVD with a menu from a template, chose a song from my iTunes library, and burned it to DVD.
The problem is that when I play the DVD, the menu plays fine and the music is great, but when I select the movie and it plays, the sound is very low and I have to turn the volume way up to hear it.
Is there a way to equalize the sound of the menu music and the movie sound so the viewer won't have to adjust the volume?

I've had this issue many times myself with i-apps. To say it's an annoyance is an understatement. I'm assuming the Menu volume adjustment isn't working as well as you had hoped. Try it nevertheless.
Click Here
This is less of an issue with apple's pro apps which address audio much better than iMovie => iDvd. However the learning curve for apple's pro apps is no cake walk.
But you do have a few remedies available to you (keeping in mind none of the following represents a cure-all):
The first is to fine tune audio in the iMovie 6 timeline for audio. You'll have to extract the original audio and set up a new track.
The second is to use garage band instead or a third party app for all audio enhancements.
The third is to follow this article:
http://docs.info.apple.com/article.html?path=iDVD/7.0/en/6683.html
There may be other approaches as well. Sure hope this helps but if not just come on back.
Message was edited by: SDMacuser

Differences between mcp and mcp t sound

this is all sound sound info direct from a man at nvidia who knows
PLEASE NOTE ONLY MCP2-T BOARD MSI DO AT THE MOMMENT IS THE K7N2G-ILSR
The MCP has no hardware support for audio of any kind, period. Windows and the CPU do all the audio work on that part and there is absolutely no DSP, NVIDIA or otherwise, in that chip to help out. Try to do EAX, any kind of reverb or chorus, or a music preset on those boards and you'll see the CPU usage climb. Ditto if you add more voices to the mix: CPU usage goes up.
The MCP-T has a full hardware audio DSP, hardware acceleration for 2D and 3D streams, and Dolby Digital encode support. EQs, HRTFs, and all environmental settings are exposed and modifiable by the user. None of this is available on the soft solutions due to the heavy hit on the CPU if they were enabled.
Short of that, you can try to use the ASIO or OpenAL drivers. You'll find that neither will work on the MCP because there is no supporting hardware for them. In short, there is no way to coax an MCP to be an APU capable part, the support simply isn't in the chip
Here's the chip differences:
MCP has the following:
- ATA-133 x 2 ports
- USB 1.0/1.1/2.0 x 6 ports
- NVIDIA MAC 10/100 x 1 port
- Legacy I/O bus (PS2, Printer, Serial)
- AC 97 host based audio (no DSP)
MCP-T includes the above and adds the following:
- 3Com MAC 10/100 x 1 port
- 1394A Firewire MAC x 3 ports
- NVIDIA APU with Dolby Digtal Encoder

thats not to say mcp is bad as this proves
The MCP2 is definately hardware sound. As far as the APU goes the only difference between MCP2 and MCP2-T is the T version has Soundstorm(Dolby Digital). Basically Mcp2-T =5.1 digital output capabilities Mcp2 no digital output, analogue output only. The other differences are the T version Has Dual Lan support and a firewire controller which the plain MCP2 does not. Here are my cpu utilization test results from Audio winbench proving that The MCP2 APU is a hardware APU.
http://www.nforcershq.com/forum/viewtopic.php?p=28870#28870
to see the test he ran ,will not copy /paste
MSI K7N2-L Mainboard
Athlon XP 2000+ Retail cooler
MSI Geforce3 TI 200
1Gig (2x512) Kingston pc2700 Ram
Maxtor DiamondMax Plus 9 8meg cache 80 gig
WD 600BB 60 gig
Onboard Nforce 2 APU (no soundstorm
just to explain differences

Sound difference between an ipod classic 160gb 2009 and an ipod 80gb

hi
iv had my ipod classic 80 gb since 2007 and just a couple of weeks ago i bought a pair of dr dre headphones solos and i tried them out on an ipod touch and the sound is much better and i was wondering if the sound would be better is i bought the newest ipod classic?

I have the Dr Dre beats headphones as well. I have the 160GB iPod Classic (2007) and I have the 64GB 3g iPod Touch. I think that the sound out of the iPod Classic is crisper and cleaner than the sound out of the iPod Touch. I did this comparison using the same settings (Equalizer was OFF) and same bit rate etc. The difference between the two machines was not great either however it was noticeable.
When you compare the two with your Dr Dre Solos are you using the same sound settings on the two iPods? Ensure that the Equalizer is either turned OFF or the same setting is used on both. The other thing is to check and see that the music that is used to compare with is using the same bit rate. In other words make sure that you comparing apples to apples.
Axel F.

Is there a sound difference between iphone 4 and 4s

Is there a sound difference between iphone 4 and 4s

Don't know what it means.
Are you listening to the iphones speaker or through earbuds?
Is something blocking your speaker?
Is the volume turned up?
Have you tried a restart?
Reset?
Restore?

Differences between sound car

I'm a little confused. what's the difference between?x-fi xtrememusic and x-fi xtremegaming?And what makes x-fi xtremegaming fidelty pro better, except for the "x-ram", than the ordinary x-fi xtremegaming?

From what I can see and have read, not much is different between the music and gamer cards. Software specifically for music I think is included with the music card. Probably something specific is included for the gamer card the music card doesn't have. Other than that, nothing. And your observation between the fatality and the gamer is pretty much correct. No other differences that I can tell and to me not worth the addition cost as most games do not yet take advantage of the ram, plus creative's shoty drivers especially on Vista made an easy choice for me. Although if I were you, I would seriously look for alternati'ves to any of Creative's sound cards unless you are prepared for major headaches especially if you are running VIsta.

Difference between Conformed dimnesion and Role play dimesion

hi,
I am not able to understand difference between Conformed dimension and Role play dimension.. Can anyone please explain the diff between both with real time example.
I am confused with Date Dimension.
Here i encountered, Cube dimension and Database dimension,what is that actually.
Thanks

Hi DevBi,
According to your description, you want to know the difference between database dimension and cube dimension. Right?
A database dimension is a collection of related objects, called attributes, which can be used to provide information about fact data in one or more cubes. What we created in BIDS is database dimension. For example, typical attributes in a product dimension
might be product name, product category, product line, product size, and product price. These objects are bound to one or more columns in one or more tables in a data source view.
Cube dimension is an instance of a database dimension in a cube is called a cube dimension and relates to one or more measure groups in the cube. A database dimension can be used multiple times in a cube. Those referenced and renamed for purpose database dimension
is role-playing dimension. For example, a fact table can have multiple time-related facts, and a separate cube dimension can be defined to assist in analyzing each time-related fact. However, only one time-related database dimension needs to exist, which
also means that only one time-related relational database table needs to exist to support multiple cube dimensions based on time.
Reference:
Role-playing Dimensions
If you have any question, please feel free to ask.
Simon Hou
TechNet Community Support

Media Foundation Source or H264 / AC3 differences between Windows and Phone 8?

I've got a working Matroska (MKV) Media Foundation Source for a Windows Store app (PC x86). It will play several different matroska files that contain H264 encoded video and AC3-encoded audio. It even has seek support. I've written the app
as a HTML/typescript Universal app with the MF Source as a C++ dll.
The problem is that the same code will not work on Windows Phone 8. I can play videos that don't require the external MF Source (i.e. MP4 files and AVI files) just fine on both platforms through my app, but the same MKV videos that played on an x86
PC will not play on Windows Phone 8 (Lumia 920).
I looked at the specs for the Snapdragon processor and it should be able to support both H264 at 720p resolution and AC3 (2-channel only). So I don't know what else I need to do to get this to work on WP8. The audio I'm trying to play is actually
6-channel, so that made me wonder if it was failing because WP8 supports 2-channel max, but I would have thought the audio just wouldn't work and the video would play normally.
Does anyone have any suggestions?
*edit* - just to be more specific, I can parse the file and create the presentation descriptor without errors. But when I finish opening the file and call the event for that, nothing else happens. What is weird is that the javascript video player
never throws the "canplay" event, nor does it throw the "error" event.
Lee McPherson

Thanks, not a bad suggestion to try.
On my Windows machine, I tried to get the MediaEncodingProfile via the createFromFileAsyc method. With a known file type, it outputs all properties of the video and audio streams (bitrate, etc). With an MKV file (container file with H264 video
and AC3 audio), I only get the type and subtype properties. Everything else is zero or null. This is because in my MFSource, I only set the type and subtype. This still allows the video to play on my windows machine. I assume the
built-in MFTransform for H264 video-to-uncompressed video parses the stream to get the relevant information. Likewise for audio.
On Windows Phone, when querying the file's MediaEncodingProfile, I get the same result. This is telling me that my MFSource will parse the file properly and set the subtypes for video and audio correctly. Everything else is still null or zero.
However, the file does not play. There is no returned event to the video element that it even *can* play.
Perhaps, I need to fill in the video and audio stream properties on the Windows Phone version. I really don't want to because that would mean having to parse some of the underlying video and audio streams themselves, not just parsing the container
information. (More work!) But this is what I mean when I ask about the differences between Windows and Windows Phone... perhaps the WP8.1 & Windows MFTransforms are different?
*EDIT* - I do get a JavaScript Console error that I didn't notice before: AUDIO/VIDEO: unknown MIME type. (VS error code: MEDIA12899)
Lee McPherson

IPod touch sound difference between headphone jack v connector?

Is there a volume or output level difference between the earphone jack and the cradle connector? Seems like lower volume out of the jack
IPod touch original

In addition to lllaass's comment...
if your iPod was purchased within the European Union, it will have the EU volume restriction installed on it, which limits the maximum volume from the headphone socket. This is a separate function to the Volume Limit to which lllaass refers. In this case, using the Dock Connector output will be at a higher level than the headphone socket. It must be the Dock Connector output though, not a Line Out from a Docking Cradle.

Sound quality: If you want to hear the difference between higher and lower bit rates

Have you ever wondered about the difference in the sound quality of music at different bit-rates? Can you hear the difference?
If you listen to 64kbps and 28kbps (either wma or mp3), you'll hear the great difference. However, if you listen to 28kbps and 92kbps (either wma or mp3), you'll find that there is little or no difference (to me, that is).
collegeboy wrote:
We all know that wma 28kbps sounds just as good as wma 320kb
ps.
the reason i and you go higher than 28 is because where able to. you can deny all you want.
If you want to experience better sound quality at higher bit-rates, the best thing to do is to listen to the music at a quiet place. This may sound like lame advise, but it really works. Try 320kbps for the best results. You'll be able to hear minor details you never had before.

SSR wrote:
Wayyyyyy back when I first started encoding MP3s I was using 28 with an inferior encoder. At the time I couldn't spot the difference, but now the difference is stark. Particular types of music (and more specifically instruments and combinations) do emphasise it though.
Actually, you cannot hear the difference when the background noise is loud, or example, public transport. I suggest that one uses a noise cancellation headset. $$$

Difference between audigy value and sound blas

Since i am unable to find comparisions between soundblaster 24bit and AudigyValue in site , Anyone can give me the difference between these two ?

Other than the name, not much. Both cards lack the EMU0K/2 chip, and have to do all processing in software (cpu processing instead of on the card). Oh yeah and the Audigy SE has newer drivers than the Value (and will probably install on the SB 24 bit).
All things considering if you are looking at a card for gaming (or just about anything else) avoid both of them.

AppleScript speed difference between 10.4 & 10.5

This post is related to a question I posed in March 2009 (https://discussions.apple.com/message/9226100) regarding the speed difference between AppleScript text handling in OS X 10.5 compared with 10.4.11.
I have recently written a script to search through a text file which is an xml file exported from WorkGroup Manager. The file, which is approximately 1.8 MB, contains all the user names on the school server (just over 1720 of them), their settings and any other information we have added. After adapting some script ideas (using text delimiters and offsets) which I found on the internet to assist with counting the number of users and searching through the information of each one, one at a time, I have a script which works far in excess of my expectations in terms of speed when run under OS X 10.4, but runs slower than molasses in winter under 10.5.
The script counts the number of accounts, extracts each user's log-in name and also their actual name (which we have entered under a 'general info' or 'comments' field - I can't remember exactly where, but it is stored in the file), makes up a complete list of all account names (with the actual name, if present) and also makes up a subset of this information into a separate list which contains only the log-in names of those whose actual name has not yet been recorded on the server, then saves both lists to separate text files.
My original attempts, using some rather clumsy text searching and comparison techniques, took about 1-2 minutes to go through the whole procedure. After some internet searching, head-scratching and a bit more more work, the finished script, when run on my G5 under OS X 10.4.11, takes less than 3 seconds to do all I have described above, including the writing to text files. To say I was pleased would be an understatement!
Because the school/work environment, where the script would be run, is all OS X 10.5 or higher, I thought I should test it out under at least OS X 10.5. The script was developed on my DP 2.5GHz G5 with 8GB RAM running OS X 10.4.11. Using a fresh, clean installation of 10.5 I ran the script and was extremely disappointed. After letting it run for more than 20 minutes and still not finishing, I force quit AppleScript and reduced the number of accounts in the file. 40 accounts took 3 seconds, 60 accounts took 6 seconds, 80 took 11 seconds, 100 took 19 seconds and 120 took 27 seconds. I eventually let the script run right through - total time taken to process 1720 users was 65 minutes, compared to 3 seconds under 10.4.11!
Given that it was tested on the same Mac, with the same amount of RAM, using the same script and the same original text file, the only variable left (that I can think of) is the change of OS version - 10.4.11 vs 10.5.
As was pointed out to me in my previous post, AppleScript in OS X 10.5 handles all text as Unicode and has a greater overhead in processing time as a result. I have implemented the various bits of advice offered by respondents to my original post and changed the way I handled lists, etc. Obviously, if the script works so speedily under 10.4.11, I must have done something right in terms of code optimization/efficiency. It's when that exact same script is run under OS X 10.5 that it slows down incredibly. I even tried it on a 2.66GHz Intel Core 2 Duo iMac running 10.5.8 - it still took 40 minutes and Activity Monitor showed CPU usage by Script Editor constantly above 80% (often well above 90%). Saving the script as an application made no difference in the time taken.
Does anybody have any knowledge about what makes AppleScript Unicode-only text handling so slow? In this case, it is 1300 times slower! Is there any way of coercing/restricting the text handling/parsing to ASCII? If I really have to, I will set up a humble eMac at school with 10.4 on it just to handle large text files quickly with AppleScript, but I would prefer to be able to do it on the normal work Macs which have 10.5 or later on them. As mentioned, under 10.4.11 the script processes the 1.8MB text file with 1720 users and writes results to two files - all within 3 seconds, so I'm not really looking for coding suggestions unless they are directly related to what has changed in AppleScript under OS X 10.5. Without sounding too smug, the script works properly and speedily (at least in 10.4). I really would like to learn about the changes in AppleScript in OS X 10.5 and how to cope with or work around those changes.

Hi,
text 3 thru 14 in largeText
character 3 thru 14 in largeText
text 3 in largeText
character 3 in largeText
These lines will be slow on Leopard
Getting some text in a variable that contains more than 60000 characters will be slower on Leopard,
but I don't know why it's slower
Here a test script.
script o
    property t_text : ""
end script
set a to "abcdefghij"
set tResult to ""
repeat with i from 1 to 3
    set o's t_text to a
    repeat (item i of {17, 15, 14}) times
        set o's t_text to o's t_text & o's t_text -- add characters in the variable
    end repeat
    set StartTime to current date
    -- test
    repeat 20 times
        set b to text 3 thru 14 in o's t_text -- get a text in the variable
    end repeat
    -- end test
    set EndTime to current date
    set TimeTaken to EndTime - StartTime
    set tResult to tResult & " Getting text in the variable which contains " & length of o's t_text & ", (20 times) = " & TimeTaken & " seconds." & return
end repeat
tResult
Here the result on my old G5, 2 x 1.8 GHZ
Getting text in the variable which contains 1310720 characters, (20 times) = 50 seconds.
Getting text in the variable which contains   327680 characters, (20 times) = 12 seconds.
Getting text in the variable which contains   163840 characters, (20 times) =   6 seconds.
The result on the same machine on Tiger is always less of one second.
Also, I try with 20 millions characters on Tiger, the result : getting text in the variable which contains 20971520 characters, (20 times) = 0 seconds.
The solution ( text item in a list)
Here the script
script o
    property my_List : {}
end script
set OldDelims to text item delimiters
set RecordDelimiter to "::::::::::::::"
set LengthOfRecordDelimiter to length of RecordDelimiter
set o's my_List to findAll(read (choose file), RecordDelimiter)
on findAll(str, findString)
    set Oldtid to text item delimiters
    try
        set text item delimiters to findString
        if str does not contain findString then return {"Nothing found"}
        set t to str's text items
        set text item delimiters to Oldtid
        return t
    on error eMsg number eNum
        set text item delimiters to Oldtid
        error "Can't findAll: " & eMsg number eNum
    end try
end findAll
set NumberOfrecords to (count o's my_List)
display dialog "There are " & NumberOfrecords & " accounts."
set StartTime to current date
set text item delimiters to ":"
set FullUserList to {}
set ListOfUnnamedUsers to {}
-- first user needs to be done separately as it is not preceded by RecordDelimiter
set EndOfHeader to "Standard:URL"
set LengthOfEndOfHeader to length of EndOfHeader
set EndOfHeaderOffset to the offset of EndOfHeader in (item 1 of o's my_List)
set OffsetToApply to EndOfHeaderOffset
set TextBeingChecked to text (OffsetToApply + LengthOfEndOfHeader + 1) thru -1 of (item 1 of o's my_List)
tell TextBeingChecked to set {UserName, NameForInfo} to {text item 1, text item 7}
if NameForInfo = "" then set end of ListOfUnnamedUsers to UserName & return
set end of FullUserList to (UserName & tab & NameForInfo & return)
-- now do all the others
repeat with CounterG from 2 to (NumberOfrecords - 1)
    set TextBeingChecked to item CounterG of o's my_List
    tell TextBeingChecked to set {UserName, NameForInfo} to {text item 1, text item 7}
    if NameForInfo = "" then set end of ListOfUnnamedUsers to UserName & return
    set end of FullUserList to (UserName & tab & NameForInfo & return)
end repeat
set o's my_List to {}
set text item delimiters to OldDelims
-- write results to file
-- 1). full user list
set TargetFile1 to (path to desktop folder as string) & "FullUserList1.txt"
try
    open for access file TargetFile1 with write permission
on error
    close access file TargetFile1
    open for access file TargetFile1 with write permission
end try
set EndTime to current date
beep
set InfoToBeWrittenToFile to FullUserList as text
write InfoToBeWrittenToFile to file TargetFile1
close access file TargetFile1
-- 2). list of users without NameForInfo
set TargetFile2 to (path to desktop folder as string) & "UnnamedUsersList1.txt"
try
    open for access file TargetFile2 with write permission
on error
    close access file TargetFile2
    open for access file TargetFile2 with write permission
end try
set InfoToBeWrittenToFile to ListOfUnnamedUsers as text
write InfoToBeWrittenToFile to file TargetFile2
close access file TargetFile2
beep 3
set TimeTaken to EndTime - StartTime
set TimePerAccount to TimeTaken / NumberOfrecords
display dialog (NumberOfrecords & " accounts took " & TimeTaken & " seconds." & return & return & "That equals " & TimePerAccount & " seconds per account.") as string

On OXS 10.8.2, difference between Quicktime and Quicktime 7 Pro ?

I just bought Quicktime 7 Pro however having a hardtime activating and getting it to work. Before buying it, I noticed the default install of OSX 10.8.2 had a Quicktime player. However, to get Quciktime 7 Pro, I read somewhere that I needed to install Quicktime 7, then plug in the registration code.
So after purchasing, I downloaded Quicktime 7. I could see the Quicktime Pro items in its menu ( with "HD" prefixes). I then went into the registration window and plugged in my name and code - exactly as shown on the store receipt - nothing happens. The Registration popup window shows a Quicktime Pro logo, but all the menu items for Quicktime Pro has disappeared. The menu items looks exatly like the old quicktime 7! with no new items.
Did I miss something?
What is the difference between the Quicktime Player installed by default with OSX 10.8.2 and Quicktime 7?

The menu items looks exatly like the old quicktime 7! with no new items.
No new menu options are added by keying QT 7 for "Pro" use. However, some options that were previously unaccessible (grayed out) will now be accessible. For instance, can you now open the "Properties" window (under the "Windows" menu) when a file is loaded in the QT 7 player app? If so, then the app is correctly keyed for "Pro" use.
Did I miss something?
Hard to say without actually seeing your system. Did you follow the instructions listed under the "Additional Information" heading on this web page?
What is the difference between the Quicktime Player installed by default with OSX 10.8.2 and Quicktime 7?
QT X is Apple's attemt to modernize QT by completely rewriting it to make better use of newer and more efficient video tecnologies—unfortunately, at the cost of compatibility with "legacy" video technologies and editing features developed over a two decade period of QT evolution. As such, QT X is still in its infancy and, on the one hand, still lacks many of the features and capabilities now taken for granted in QT 7 Pro (like layer compositing of content at the track level), and, on the other, adding new features (like the playback of "transport stream" files or native support for MPEG-2 GOP and AC3 content) which are not possible in QT 7.

Print quality difference between iphoto and aperture...?

when ordering books, is there a print quality difference between using iPhoto and Aperture? or are they sent to the same lab?
it's possible i may have some setting wrong, but when i order a book using iphoto, i never really feel the quality is that great. it's good, i just feel it could be a lot better. the print quality sort of reminds me of newsprint, albeit high quality newsprint. similar sized prints made at home on my basic 3-in-1 printer look better.
thanks...

Previews are what you view on your display. When you import a photo into Aperture (and I'm pretty sure iPhoto as well), your computer automatically generates a preview for quick viewing. The original images are stored in your library, but it is the preview that you see.
In Aperture, you are able to set the size and quality of these previews. When sharing photos between Aperture and iPhoto, the process is as follows:
Let's say that your images are stored in Aperture, but you also want to be able to view them in iPhoto without taking up too much room on your hard drive. Essentially, if you were to import the originals into iPhoto as well, you would be storing two exact, yet separate copies of the same image on your hard drive. As you are aware, with large images (whether JPEG's, and especially RAW) this would put quite a tax on your storage capacity after not too long.
So, you have your images in one or the other (in this case Aperture), but you want to play around with them in iPhoto. What you can do, is open iPhoto, go to the File menu and then select, Show Aperture Library. This will open a window with all of the contents of your Aperture Library. You can then drag any images you want into iPhoto . The only thing is, you are not dragging the original JPEG's, but rather, the previews of those images. If you have those previews set to a lower quality (again for capacity concerns), you will only have lower quality and lower detailed images in iPhoto. These images might not be ideal, or even suitable for printing high quality prints. The previews that you generate in Aperture though can be adjusted to be extremely high quality with no size limits.
My thinking was that since you mentioned Aperture, it sounded like you had experience with working with it and with ordering a photo book through Aperture. I guess you were saying that you ordered via iPhoto, weren't happy with the quality and were wondering if Aperture created books were better.
Anyway, if this is the case, I cannot answer that for you. I have never ordered a book through Aperture. If the quality of your images is good, you should be able to get a decent product no matter where you order it from. There is not doubt that the materials used and the print shop that does the work makes a difference, but if your images are good, you should still get a decent product through iPhoto. Perhaps iPhoto isn't the way to go though if you have had poor experiences with them.
If you haven't used Aperture yet, I would highly recommend it though aside from the photo book aspect of this thread. It is a stellar product.
I hope this helps.
Message was edited by: macorin

Whats the difference between Fatal1ty and Fatal1ty USB heads

Whats the difference between Fatal1ty and Fatal1ty USB headset? What is the $30 price difference for other than a USB connection?
Also, what is the advantage to using the USB port?
Still trying to decide on which headset to buy. I will be using these mainly for gaming and some music. Although i'm not real picky when it comes to music quality. Even considered the HS-1200 wireless. Which headset of these 3 has the best sound quality and better quality?
Message Edited by iowabucks on 10-20-2008 07:54 AM
Message Edited by iowabucks on 10-20-2008 08:10 AM

Any USB sound related item is going to use system resources instead of the non usb version. The non usb version uses the resources of the sound card and not system resources. So you should get cleaner sound with the non usb version.
But, be aware creatives tech support is not the best in the world. Keep that in mind when buying a product from them.

Differences between ac3 sound conformity

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