How to encode Dolby Digital (AC3) 24 bit

I noticed that all my dolby digital setings in Compressor are in 16 bit. Is there a way to have them set on 24 bit. In A.Pack, you could encode the audio in 24 bit.

I could be misunderstanding something, but I've been reading Apple's whitepaper to make sure of the details.
"48 bit" is unclear, because it could mean 12x4 or 16x3. Both combinations are impossible with ProRes 422.

Similar Messages

Encoding Dolby Digital 5.1 (AC3) sound in MP4 files using AC3 pass-through

Looking for an application that will encode Dolby Digital 5.1 (AC3) sound in an .mp4 container using AC3 pass-through for playing videos with surround sound on ATV.
Handbrake is out of the question because I run Tiger. The Tiger version cannot do AC3 pass-through.
Visual Hub is no longer available.
Any other options?

You may need Apple's MPEG2 QT plugin as well for MPEGStreamclip.
Also, consider if running windows in parallels/Boot Camp etc that there's a windows version, and possibly a linux version.
VisualHub code was released open source - Google FilRedux and PunyVid (iSquint derivative). Not tried either though.

Dolby Digital/AC3 encoding?

I just bought a K8N Neo4, and hooked it up to my Panasonic audio receiver - just the one cable, S/PDIF optical. I was hoping to get 5.1 sound out of this, but all I get is two channel stereo.
Is there any way to encode a signal that my receiver can use to produce full surround sound (it supports Dolby Digital and DTS signals)?

Nice.
I never even heard of it. I always thought the only way was to go 6ch analog and have your external amp support multi channel in if the source wasn't DD/DTS already in which case it's not DD anyway. Otherwise you only get 2ch PCM on the SPDIF. Then again I only have owned Creative sound cards....geez even then Creative made you buy the breakout box to enable AC3 decoding unless you made a board mod... Of course you still need a multi channel source. What kind of software do they come with? Can you play a 6ch .wav for example and have a DD/DTS stream over SPDIF/Optical? or is only really for games, so for simplicity you can have one cable/fiber and not go analog till it 's on the way to the speakers? Still though except for a few less cables, and when the D/A conversion takes place(and therefore the quality of which component is doing it, sound card or amp) I don't think it's that big of a deal if you have multichannel input amp. DD is still not lossless compression so the big advantage would seem to be for those without multichannel inputs. Otherwise it would be an interesting comparrision for the audiophile which I'm not. You have a pure source and you compress to DD and lose quality and then decode and output vs. Pure source going analog, losing signal quality along the way and outputting. someone on the internet has surely done it.

Sound Blaster able to encode Dolby Digital 5.1 and abo

Hi there.
I recently buy a new motherboard without dolby digital encoding onboard (the older, nForce2 (asus a7n8x deluxe had that capability, the new one, doesnt, it is an asus a8n-sli premium)
I use the coaxial digital out to connect my computer to the home theatre with only one cable (that rules), also, enabling "cloning" allow me to listen using at least 4 speakers, instead of the two front ones.
Someone told me to buying a "cheap" sound blaster will do the trick.
My options are (from cheap to expensi've):
CREATIVE AUDIGY SE SB0570 OEM
CREATIVE AUDIGY SE SB0570 BOX
CREATIVE AUDIGY2 VALUE
CREATIVE S.BLASTER X-FI PLATINUM
CREATIVE S.BLASTER X-FI XTREME
For me, the best option is the SB0570 BOX. The Audigy2 VALUE have 2.5 times the price of it.
What do you recommend?
Thanks in advance!
Fa

Analog to Digital Conversion is exactly that: It translates the Analog input signal of eg. a microphone into a PCM digital signal, with 24-bit precision. That is essentially the Line-IN and the Microphone input. (Although for the microphone they tend to have lower precision but amplify the signal).
There is a sticky at the top of this forum which you should read to understand the difference between the various digital formats.
To make it clear: The Sound Blasters have an SPDIF output which can send digital signals. However it does not have a Dolby Digital compression engine, so it will either send uncompressed PCM signals if it has processed them before. If you have a source that is already in Dolby Digital then you can redirect it through the SPDIF output and get full surround sound. This ONLY happens on DVDs, because they come precompressed.
Everything that gets processed on the soundcard is outputted as PCM digital: For 6-channel audio there are 3 connections which end up on 3 DACs (Digital to Analog Converter) where the digital signal is then made into analog for the speakers to be able to play it. The SPDIF connection simply bypasses the DACs (the DACs of the receiver are used) but takes only connection, that of the front speakers.
Dolby Digital AC-3 is a compression mechanism, which compresses sound (much like mp3), so that it can fit in only one connection, where uncompressed only a stereo signal would pass. (In doing so, it also lowers quality!)
So: If you want to use a 7. speaker system with a Sound Blaster you have to go analog, which also means 3 cables (because they have 3 wires for the channels + ground). And I don't think Dolby or DTS supports more than 5. channels for the time being, so not even with Dolby Encoding onboard could you do it with one cable.

Can't TAG Mp4 files with Dolby Digital AC3 5.1

Hi everyone, I use iTunes to TAG all my Mp3 and Mp4, I have over 100,000 Mp3 tagged with iTunes without no problem and over 2,000 DVDs concerts, TV series, etc in Mp4 format tagged also with iTunes without any problems, all my Mp4 til now have 2 channel stereo sound.
My problem now is that I'm making some Mp4 movies with dolby digital 5.1 and this Mp4 play perfect in iTunes and QuickTime ''but'' I can't TAG them in iTunes because of the AC3 5.1, I'm sure of this because everthing made in 2 channel stereo have no problem to TAG in iTunes. If I TAG them its seems in the begining to write the TAGs but if I clear iTunes and then re-load again the files the TAGs dissapears.
I use MAC and PC. I use Nero Recode 2 to make my Mp4. I have the last version of iTunes and QT.... I have noticed that Winamp can write the TAGs without any problems and stays there but what I need is to iTunes recognize that TAGs because I run all my libraries in iTunes
Thanks in advance, sorry for my english.

Anybody please, any answer can help me please... Is that no body has experience this same problem?
If iTunes can't support TAGs with 5.1 is possible to fix this in the next update?
Regards

How to play Dolby Digital 5.1 soundtrack in a movie with iTunes (PC)?

I can't play Transformers: Dark of the Moon with Dolby Digital 5.1 soundtrack. It's simply greyed out, I can choose English Stereo and Hungarian Stereo. I played with the settings, but no luck. I don't know it's hardware related or else, I even try QuickTime, but it doesn't even play audio or video, just grey window.
My PC:
Windows7 32 bit Home Premium
Pentium E5300
2 GB RAM
Geforce GT 440
ASUS Xonar DSX
Genius SW-HF5.1 4500

Hi MW
I have checked User s manuals for F10-140 and on page 32 I have found this:
HEADPHONE (S/PDIF) JACK This jack lets you connect peakers or stereo headphones (16 ohm minimum). When you connect a speaker or headphones, the internal speakers are automatically disabled.
This jack can be used also as S/PDIF jack and enables connection of optical digital correspondence apparatus.
Bye

How 2 buy dolby digital live from a country that is not listed in the form ?

Ok this is my first post on this forum .. and i feel like i was forced 2 do this becouse :
I own a X-fi elite pro? and i've been trying to make dolby digital li've work on my sound card for about 6 month now ..
I thought if i have a visa and a foreign exchange bank account it will be fine .. trying 2 buy it
but it's not .. becouse when filling the form for buying dolby? nowere can i see Romania , i tryed filling in anotherr country but it keeps giving me errors
about the tranzaction that can't be done .
I also did send 2 mails to creative but looks like nowbody bothered to hel me ..in one and a half week.
my only solution is 2 sell this so called great sound card ,which it is but with the wright support from creative , and buy a auzen prelude x-fi , because as
far as i heard they sell u the dolby license when u get it.
By posting here I hope that somebody , maybe a forum admin or moderator , could help me resolve my problem becouse nowbody respondes to my mails? .
Whater it's only a code that could be mailed to the buyer why do you need the country becouse you are not shipping me the code ?
Excuse my poor english ,
Have a nice day ,
Teaca Gabriel

P? What is in fact the thing which i'm buying ..
A ? is it a big box that weights 30kg and need shipping ? NO
B Is it a piece of harware that needs shipping ? NO
C ? It's a code that alows me to use my sound card for the reason i've bought it and it an be mailed to my adress mail after i pay it's ? answer : YES
Maybe i did not understand .. why can't you mail me the code after i pay the ~5 $ that alows me to use dolby digital .. ? Why do you have support for romania if you can;t send mails to romania .. .
I understand the license may be? shipped in a package ? try to make me understand why is so f***ing difficult because i do not get it .. why can i downlaod the software if i can not activate it ?
And what should i do to resolv my problem ?maybe take a plane to uk ? and make a card in that country only for buying this ? no wonder guys mode youre drivers .. explain waht are you shipping that is so heavy / hard to arri've to my country .

How to enable dolby digital in itunes

Hello, what steps are needed to enable dolby digital to work in ITunes? Thanks.

Set up iTunes and your DVD Player for digital surround sound - Apple Support

How to enable Dolby Digital Live on my GX640

Heya i saw the audiochip on this laptop has Dolby Digital Live.
But i cant seem to get it working? I know some brands make you buy a pack to get it working? Do i need one for this laptop and where can i get it from?
Atm i got everything working but Live so i know it aint the connection (dts and such work)
Does anyone know?

Set up iTunes and your DVD Player for digital surround sound - Apple Support

How to get Dolby Digital from ATV2 and iTunes Movies??

I have an ATV2 hooked up to my Denon 789 AVR via optical cable, and the HDMI hooked directy to my HTDV. My Denon is receiving the signal apparently as a PCM and thus, only receiving 2 channel. When I stream an iTunes movie from my ATV2, I only get Dolby Pro Logic II, and not Dolby Digital. When I go into the ATV2 settings and under Audio and Video set Dolby Digital from "Auto" to "On", I don't get any sound on my Denon 1910. Any idea what's going on?

mightyprops wrote:
... I see the Dolby sound icon on the movie's page........
That would be the place to look.

Going from Dolby Digital (.ac3) back to .aiff without A.pack

Sup sup,
Ok, so I'm helping some folks out by authoring the DVD for their short film.
I'll spare you guys the yawn-inducing details but the issue I'm facing is that I need to create an aiff file from an .ac3 file in order to have (aka edit down in FCP) the right music for the main menu.
Back when we had A.pack, you could 'decode' an .ac3 file into an .aiff, but, as best I can tell, that's not possible with Compressor 2. So what's a cat to do? (or am I missing out on some obvious functionality somewhere in the FCS apps)
And, yes, I've asked them about having the original elements in .aiff format and they don't (they're not technically savvy and they had a genuine issue with music that kinda put stuff out of their hands).
Any and all suggestions are welcome.
LOL. I can't believe I'm actually missing A.pack right now.

hanumang,
Open up MPEG Streamclip,
drop your ac3 file into it,
select File>Demux to AIFF.
give it a useful name.
relax.
I just tried it and it seems to work (on a simple L/R stereo file)
Good luck,
x

Digital Connections, SPDIF and Dolby Digital Info

I have noticed that many people have problems using their digital connections, so I put together this info to try and explain the difference between digital and analogue, and how to use them.
Digital ConnectionsDigital connections come in two standard forms, optical and coax. They both give you exactly the same result, the only difference is the medium (material) through which the signal travels. The thing to remember about digital is that for ordinary, uncompressed sound, it will only carry a stereo signal. So, if you like to use CMSS with your music, or you try the speaker test function, optical/coax is useless as you only hear the front left/right speakers.
Movies wth Dolby Digital (AC3) & DTSMovies on DVD often use encoded audio in the form of Dolby Digital (AC3) or DTS. This means that all 6 channels are compressed into a single stream of digital data. A decoder is required to extract the channels and send the sound to the correct speakers. There are three ways to do this.
) Pass the AC3/DTS signal to a external decoder. This is where your optical/coax connection is used. To go down this route, you must first have a set of speakers or a decoder that supports Dolby Digital. In your DVD software, select 'SPDIF' as the audio output method and 'SPDIF Pass-through' in your soundcard options. What this does is tells both the software and soundcard to leave the audio from the DVD in compressed form and send it straight through the digital outputs. Your digital speakers/receiver will do all the decoding to give you full surround sound. Please note that this is the only way to get 6 channels through an optical/coax cable.
2) Decode the AC3/DTS with your Sound Blaster.You should choose this option if you don't have an external decoder. In the DVD software, select 'SPDIF' as the audio output method and make sure that 'SPDIF Pass-through' in the souncard options is off. The DVD software will now pass the compressed audio to your soundcard, which will then decode the data. The soundcard will output the 6 channels using the analogue connections (or digital DIN, more on this later). If you try to use a digital optical/coax connection to your speakers, you will only hear faint sounds from the front left/right speakers.
3) Decode the AC3/DTS with software.If you have a soundcard that doesn't support Dolby Digital (like the SB Li've! 24-bit) and you don't have digital speakers, the only way for you to get surround sound in movies is to use software to decode the AC3/DTS. The free versions of DVD software you get with hardware often don't support this feature, you will most likely need a full version. First select 'Dolby Digital' or 'DTS' decoding in the DVD software audio options (you must select the right sound format for the movie you are watching). Then make sure that 'SPDIF Pass-through' in the soundcard options is off. As with method (2) you must connect your speakers with the 3 analogue cables, not optical/coax.
PC GamesPC games usually use technologies like as EAX to create surround sound, not Dolby Digital. So even if your speaker system has a Dolby Digital decoder, it will be of no use when playing games. The EAX processing is done on the soundcard, and the 6-channel sound is output via the analogue (or digital DIN if available). So you still need analogue connections to your digital speakers for games, if you just use an optical/coax cable you will only get the front left/right sound.(N.B. X-Box games do support Dolby Digital, so if you connect your X-Box to your Dolby Digital receiver/speakers with the optical cable, you can get full surround sound.)
Creative's 4-pole mini-jack & Digital DINYou can only get the full use out of this connection when used between Creative Sound Blasters and compatible Creative speaker systems. It is the digital equivalent of the analogue connections, but instead of using 3 stereo sockets, you use just one digital socket. There are 4 conducting connections in the socket (unlike coax which has two) so there are enough connections to carry 3 different digital stereo signals (front R/L, rear R/L and Sub/Centre). You will probably require a 4-pole mini-jack > DIN converter to connect your Creative speakers to this socket. Using this connection will allow you to get surround from games (unlike SPDIF). However the digital DIN input on some Creative speakers can't receive AC3/DTS data, so you may still require an optical/coax connection.
N.B. This digital socket on the Sound Blaster cards doubles as the digital coax output. If you don't have digital DIN, you can use a mono or stereo mini-jack > RCA converter to connect to the coax input on your speakers, as the front R/L or AC3/DTS signals are sent through the tip of the plug.
More InfoCreative's Speaker Conectivity Guide: http://support.creative.com/kb/ShowA....aspx?sid=5035
Dolby Surround info: http://www.dolby.com
I hope that clarifies the issue .
Message Edited by KokChoy-CL on 07-04-2008 :0 AM

Digital Connections, SPDIF and Dolby Digital (german revision)
Options
03-08-2007 01:52 AM
Digital Connections, SPDIF and Dolby Digital Info
Übersetzung + Erweiterungen + Revision 03-08-07
Der Digitale Anschluß
Ich habe beobachtet, daß viele Leute Fragen zu den Sound-Anschlüssen haben, daher trage ich hier einige Infos zusammen und erkläre die Unterschiede in der Verwendung der digitalen und analogen Anschlüsse.
Digitale Anschlüsse – S-PDIF & Toslink
Am PC gibt es zwei häufig verwendete digitale Anschlußformate optisch (Toslink) und koaxial (S-PDIF).
Im Prinzip erzielen beide Anschlüsse genau das gleiche Audio-Ergebnis.
Der primäre Unterschied ist das Medium ( das Material ) durch das das Signal übertragen wird. ( Glasfaser oder Kupfer )
!! Update !!
Ein wichtiger Aspekt in der Auswahl von digital-optischen Anschlüssen erklärt sich durch das Vermeiden einer sogenannten „Brummschleife“, d.h. eine elektrisch leitende Verbindung zweier Geräte muß vermieden werden.
( mit Lichtwellenleiter - LWL- z.B. mit dem Anschluß-System Toslink )
In der Elektrotechnik ( Niedervolttechnik ) wird oft der „Negative“ Pol der Spannungsversorgung über das elektrisch leitende Gehäuse ( die sogenannte Masse )geführt. Das spart einerseits einen weiteren Kabelweg ( also Kupfer ) ein und ergibt eine mehr oder weniger wirksame (Ab-) Schirmung. Diese Schirmung soll die elektronische Schaltung vor elektromagnetischen, hochfrequenten und niederfrequenten Störeinflüssen je nach Ausführung der Schirmung schützen.
Üblicherweise besitzt jedes elektronische Gerät eine eigene Spannungsversorgung. Netzteile in elektronischen Geräten unterscheiden sich in der Art der Spannungsumformung, in der Höhe der Spannung, in der zur Verfügung gestellten Leistung, durch verschiedene Bauarten und unterschiedliche Bauteil-Tolleranzen entstehen somit verschiedenste Masse-Potentiale.
Werden solche Geräte durch elektrisch leitende Kabel verbunden, kommt es zu einem Ausgleich der verschiedenen Masse-Potentiale. Ein negatives Ergebnis der Verbindung von TV-Geräten oder PC-Komponenten mit Audio-Komponenten ist oft eine hörbare Beeinträchtigung von Audio-Signalen - ein tieffrequentes Brummen.( auch Brummschleife oder Masseschleife genannt )
Hierfür verantwortlich zu machen ist eine elektrisch leitende Verbindung. In der HiFi-Technik ist das in der Regel ein Koaxialkabel und dessen Schirmung.
Vermeidung u. Reduzierung dieser Störgeräusche Ansätze
!! Der einfache Weg !!
Einsatz einer optischen Signal- / Datenübertragung mit Lichtwellenleiter
- Glasfaser als Trägermaterial
( Einsatz einer Datenübertragung ohne elektrisch leitende Verbindungen )
aufwendige Wege
Einsatz einer Galvanischen Trennung - mit einem Ground-Isolator
(Massetrennung )
+ die elektrische Verbindung der Schirmung wird umgangen
- aber Leistungs- & und Klangverlust(geringere Dynamik)
- Verwendung von ( hochwertigen ) symmetrischen Verbindungen
( „PLUS“ „MINUS“ „Masse“)
+ Trennung der Schirmung an einer „Seite“ des Kabels möglich
[bei Koaxialkabel unsinnig weil eine Ader zerstört wird und
anschließend dieses Kabel wertlos ist ]
- sehr große Anschlüsse
- Profibereich
- Einsatz einer zentralen Spannungsversorgung für alle miteinander
verbundenen Geräte
Nachtrag
Bitte nicht verwechseln mit Netzbrummen - die Einstreuung der Netzfrequenz 50 Hz ( EU ) oder 60 Hz ( US ) in den Audio-Signalweg das ist üblicherweise auf eine nicht ausreichende Entstörung oder(Ab-)Schirmung zurückzuführen ist.
- End - !! Update !!
Einige Vorbetrachtungen
Die traditionelle Ton-Übertragung ist ein unkomprimiertes Signal, es wird in Stereo übertragen.
Wenn du CMSS ( Creative Multi Speaker Surround simulierten Surround Sound ) aus deiner Stereo-Musik erzeugen willst oder der Sprach-Test abgerufen wird ( nur über den Center ) ist der digitale Anschluß ( optisch & koaxial ) unbrauchbar, denn es würden nur die Lautsprecher Front-Rechts und Front-Links angesprochen !! Es wird ein anderer Anschluß benötigt, der die Kanäle einzeln ansteuert.
Für das Format 5.1 ist das die Verbindung über die drei 3,5 mm Klinken-Stecker ( 3 mal 2 Kanäle ) mit der folgenden
Kanalzuweisung 5.1
Front R / Front L + Rear R + Rear L + Subwoofer / Center
Mehrkanalton in Filmen - DolbyDigital (AC3 / DD) oder DTS
Filme auf DVD verwenden häufig ein kodiertes Mehrkanal-Audiosignal, in der Form DolbyDigital ( AC3 / DD ) oder DTS. Bei dem gebräuchlichsten Format 5.1 werden 6 Signale ( 3 mal 2 Kanäle ) in einem digitalen Datenstrom zusammengefaßt und komprimiert = das Kodieren.
Nach der Übertragung des Signals muß aus diesem Datenstrom ein Decoder die entsprechenden Töne trennen und jedem Kanal zuordnen = das Dekodieren.
Drei Varianten der Decodierung sind möglich.
(1) - AC3 / DTS Signal wird zu einem externen Decoder geführt
Genau hier wird der optische / koaxiale Anschluß genutzt. Um diese Variante nutzen zu können, mußt du ein digitales Lautsprecher-Set oder einen Digital-Decoder ( z.B: Digital-Receiver ) besitzen, der die Dekodierung des gewünschten Formats ( DD, AC3, DTS) übernimmt. Für jedes Digital-Format benötigt man einen entsprechenden Decoder – das Handbuch weiß hier oft mehr – welches Format von welchem Gerät dekodiert werden kann !!
Wähle in deiner DVD-Software den zur digitalen Datenübertragung gewünschten Anschluß "S-PDIF"( Koaxial ) oder "Optisch" als Audio-Ausgang.
In den Soundkarten-Einstellungen muß die Option "S-PDIF-Durchschleifen" ( "SPDIF Pass-through" ) eingestellt werden.
Dadurch wird das Audio-Signal von der DVD in digitaler ( komprimierter ) Form direkt an die Digital-Ausgänge der Soundkarte weitergeleitet. Anschließend kann ein angeschlossener externer Decoder z.B. im digitalen Lautsprecher-System oder im Digital-Receiver die Decodierung übernehmen und es entsteht ein „Räumliches Klangbild“.
Bitte merken:
Daß ist der einzige Weg 5.1 Signale ( digital ) über ein koaxiales bzw. optisches Kabel zu übertragen.
(2) - AC3 / DTS mit der Soundkarte decodieren
Diese Variante ist zu verwenden, wenn du keinen externen Decoder / Receiver verwenden willst.
In der DVD-Software wird "S-PDIF" als Audio-Ausgang gewählt und es muß zwingend in den Optionen der Soundkarte "S-PDIF-Durchschleifen" ( "SPDIF Pass-through" ) deaktiviert werden.
Die DVD-Software wird jetzt das ( digitale ) komprimierte Audio-Signal an deine Soundkarte senden und dann werden dort die digitalen Daten decodiert. Die Soundkarte gibt dann die 6 Audio-Kanäle ( bei 5.1 ) über ihre drei analogen Anschlüsse aus ( 3 mal 3,5 mm Klinke ) mit folgender
Kanalzuweisung 5.1
Front R / Front L + Rear R + Rear L + Subwoofer / Center
Es wird in diesem Beispiel also ein 5.1-Lautsprecher-System benötigt, mit der analogen Anschluß-Option von drei Klinken-Steckern.
( also 3 x 2 Kanäle = 3 mal 3,5 mm Klinke )
- die Einspeisung eines digitalen Signals über DigitalDIN, ist mit dem optionalen digitalen E/A-Modulbei möglich ***
- wird hier ein optisches / koaxiales Kabel verwendest, hörst du nur schwache Töne der Front-Lautsprecher R + L
*** Bei Karten der SB073X-Serie verfügt diese Buchse nicht über die Digital-In-Funktion !! zur Unterstützung des digitalen E/A-Moduls )
[ mehr unten ]
(3) - AC3 / DTS mit einer Software decodieren
Wenn deine Soundkarte kein DolbyDigital unterstützt
( wie die SB Live! 24-bit ) und auch kein digitales Lautsprecher-System vorhanden ist, kannst du Raumklang
(Surrsound-Sound ) aus DV-Filmen auch über eine AC3 / DTS fähige Software erzeugen.
Gratis-DVD-Software-Versionen unterstützen diese Funktion häufig nicht, du benötigst dann eine Software-Voll-Version.
Wähle die gewünschte digitale Audio-Tonspur „DolbyDigital“ oder „DTS“, im Audio-Menü einer DVD.
Dann stelle sicher, das in den Soundkarten-Optionen "S-PDIF-Durchschleifen"
( "SPDIF Pass-through" ) ausgeschaltet ist.
Wie unter (2) mußt du deine Lautsprecher mit den drei analogen Kabeln anschließen und nicht optisch oder koaxial !! ( 3 mal 3,5 Klinke )
Kanalzuweisung 5.1
Front R / Front L + Rear R + Rear L + Subwoofer / Center
Generell sind bei zuvor genannten Varianten (1) – (3) auch andere mehrkanalige
Wiedergabeformate möglich.
In Abhängigkeit von der Ausstattung der Quelle also von der DVD. der CD. der TV-Karte, dem Game usw. sind andere Formate z.B. 2.0 / 2.1 / 4.0 / 4.1 / 5.1 / 7.1-Kanal Wiedergabe möglich.
PC Spiele
PC Spiele nutzen normalerweise Technologien wie EAX, die ihren eigenen Surround-Sound, ohne Verwendung von DolbyDigital erzeugen. Selbst wenn dein Lautsprecher-System einen DolbyDigital-Decoder besitzt, ist dieser für Games unbrauchbar. Denn die EAX Verarbeitung findet direkt auf der Soundkarte statt und die Ausgabe der 6 Kanäle ( 5.1 ) erfolgt über die analogen Ausgänge
( 3 mal 3,5 mm Klinke ) ( oder über DigitalDIN, wenn vorhanden *** ).
*** Bei Karten der SB073X-Serie verfügt diese Buchse nicht über die Digital-In-Funktion !! zur Unterstützung des digitalen E/A-Moduls ) [ mehr unten ]
Kanalzuweisung 5.1
Front R / Front L + Rear R + Rear L + Subwoofer / Center
Für Mehrkanalwiedergabe in Spielen benötigst du also Lautsprecher-Systeme mit analogen Anschlüssen oder einen Digital-Receiver mit analogem ( 5.1 ) Eingang.
Wenn du ein optisches / koaxiales Kabel verwendest, dann kannst du nur die vorderen Kanäle ( links / rechts ) hören.
!!! Notiz !!!
X-Box Spiele unterstützen DolbyDigital, wenn du deine X-Box mit einem DolbyDigital-Receiver oder einem digitalen Lautsprecher-System über optische Kabel verbindest, kannst du den vollen Surround Sound nutzen.
Die Sound Blaster Karten der SB073X-Serie bieten neben dem digitalen ( koaxial / extern ) Anschluß über den Anschluss Flexi-Jack auch noch einen weiteren Anschluß, direkt auf der Karte ( koaxial / intern )
Flexi-Jack - DigitalDIN
Wenn du kein digitales E/A-Modul ( Digital I/O-Modul ) benutzen kannst, ist es möglich mit einem Klinke-Chinch Adapter ( RCA-Adapter ), ein digitales Lautsprecher-System oder einen Digital-Receiver digital ( koaxial ) über den Flexi-Jack-Ausgang der Soundkarte zu verbinden. Alle MiniDin bzw. 3,5 mm Klinken-Stecker können in der Mono- oder auch in der Stereo-Ausführung verwendet werden, denn der mittlere / vordere Pin des 3,5 mm Klinken-Steckers überträgt das AC3 / DTS Signal. Dazu benötigt man eine der folgenden Verbindungen
3,5 mm Klinke ( Mini DIN ) auf Chinch - Adapter ( RCA-Adapter )
für den S-PDIF-Anschluß( koaxial ) an Lautsprecher-Systeme mit digitalem Eingang bzw. Digital-Receiver kann man folgende Varianten verwenden
- Klinke-Mono - Chinch-Stecker ( Stecker –Stecker ) ( Favorit !! )
- Klinke-Mono auf Chinch-Mono ( Stecker - Kupplung ) + Chinch-Verbindungkabel
( Stecker - Stecker )
- Klinke-Stereo auf Chinch-Mono ( Stecker - Kupplung ) + Chinch-Verbindungkabel
( Stecker - Stecker )
Das digitale E/A-Modul ( Digital I/O – Modul )
Die Verwendung von optionalem Zubehör Digitales E/A-Modul ( Digital I/O-Modul ) bietet die Möglichkeit der direkten Verwendung eines S-PDIF Verbindungskabels und stellt zusätzlich zum koaxialen Anschluß einen optischen Anschluß ( Toslink ) bereit. Die optische Verbindung kann wie oben beschrieben zur Vermeidung einer Brummschleife hilfreich sein.
Des weiteren wird ( abhängig von der Ausstattung der Soundkarte *** ) ein digitaler Eingang über das E/A-Modul bereitgestellt, der Eingang ist ebenso wie der Ausgang in optischer ( Toslink ) und koaxialer ( S-PDIF ) Bauform ausgeführt.
Achtung !!
( *** Bei Karten der SB073X-Serie verfügt diese Buchse nicht über die Digital-In-Funktion !! zur Unterstützung des digitalen E/A-Moduls )
interner S-PDIF E/A-Anschluss ( für Geräte der SB073X-Serie )
zum Anschluß einer Decoderkarte oder externer Decoder bzw. Lautsprechersysteme mit digitalem Eingang ist ein entsprechender Adapter erforderlich
Bei einigen Modellen ist eine Dekoderkarte im Lieferumfang enthalten bzw. in einigen Regionen als Zubehör erhältlich
Front Panel-Sockel (für Geräte der SB073X-Serie)
2 x 5-poliger Front Panel-Sockel nur für Verbindungen mit einem Intel HD Front Panel Audio-Standardsockel (nur Geräte der SB073X-Serie) Intel Front Panel Audio-Kabels (separat erhältlich)
Anschlusskompatibilität
Ausschließlich Intel HD Front Panel Audio-Standard
Nicht kompatibel mit AC97 oder Intel-kompatiblem HD Front Panel Audio
Einschränkungen
Wenn neben den hinteren Mikrofonen auch Frontmikrofone angeschlossen sind, werden die hinteren Mikrofone automatisch deaktiviert.
Sound Blaster X-Fi E/A-Konsole
Auf der Rückseite Ihrer X-Fi-E/A-Konsole* befindet sich eine sogenannte DIN-Buchse. Um die Funktionen für eine integrierte Lautsprechersteuerung zu nutzen, können Sie an diese Buchse ausgewählte analoge Creative-Lautsprechersysteme anschließen, die über eine Kabelfernbedienung oder eine Audiokonsole verfügen.
So können Sie beispielsweise über den Master-Lautstärkeregler Ihrer X-Fi-E/A-Konsole die Lautstärke der Lautsprecher regeln oder die Lautsprecher stummschalten.
-eof-

Audigy4 Pro - Dolby Digital Li

In my effort to further simplify connections in my home theater, I would like to be able to have surround sound gaming (EAX) pass through my optical connection to my reciever as Dolby Digital just like DVDs and WMV/Xvid/etc... I know that none of the current SoundBlasters do this out of the box, but are there any hardware or software modifications that can be done to the card/driver for me do this? It seems that such a capable card should be able to convert EAX to DD. I love the card, but I'm going to wind up switching to another line in a few weeks if I can't find a solution. I just do not want to run six cables from my PC to my receiver and then have to switch my receiver from DVD to 6-Channel input every time I start a game or listen to music or watch a movie.
If I'm just beating a dead horse, does anyone know when or if Creative will unveil a sound card with the ability to encode Dolby Digital in real time? I haven't had a computer without a Creative sound card in it in over a decade, so if something is coming soon, I can hold out for a little while...

you must think that dolby digital is not a no loss codec
analog 5. is no loss!!! thats the point i think
from that point analog is better than li've ac3(but thats just for we germans call they beamte:-)))
but i apreciate? a li've ac3 encoder too because its more easy to use than the three to 4 audio cables
my english is bad sorry

AIFC to Dolby Digital...

My movie Soundtrack right now is an AIFC file. In FCP6 I used File --> Export --> Audio to AIFF. I think it sounds good. It comes up on my DVD player as PCM 48 2 channel file for the audio.
Is it necessary to go into Compressor and change this format (AIFC) into Dolby Digital (AC3)? Is there a big difference?
I am curious about this one. I sent my movie screener to a few festivals in this PCM 48 2 channel format for the movie. For the master I should use Dolby?

AIFC is a variation on the AIFF audio format that +allows for+, but does not neccessarily have to be compressed.
AIFF and AIFC files are quite large when compared to highly compressed Dolby ac3 audio.
The question you should be asking is whether your video quality is being compromised because it has to have a lower bit rate to accomodate your large audio file and is their an audible difference in using ac3. But only you can answer that.

Dolby Digital Encoder Does Not Support Any Encoding Options

Is it just me, or are there no encoding options for the Dolby Digital encoder other than the bitrate?
How are you supposed to select the dialog normalization, dynamic range compression profile, etc. for your audio? Without these parameters set correctly, the audio will not be encoded correctly.

@jbowden:
> Adobe licenses the AC3 encoder that Encore uses from Dolby Laboratories. This is stated quite clearly in the splash screen, the box, and other materials distributed with Encore.
I didn't say otherwise. But what they license is the code, not the implementation. Implementations are supposed to be submitted to Dolby for approval, and I'm surprised that Dolby approved the implementation given the oversights and encoding quality.
> It's a consumer-level encoder, and if you look around this forum I think you'll find very few posts about audio quality, which would seem to indicate that Encore provides acceptable audio quality for most users. Cases with audible clipping can occur if the input signal is too high...keeping your audio signal around -6db should eliminate any clipping.
I don't buy into this whole argument about "consumer-level" and "professional-level". What is the exact difference? Dolby's code is constant across all licensed encoders, so any differences in encoding are the result of an implementation difference, and that's Adobe's fault, not Dolby's.
Audio signals are audio signals. Why do I have to keep my audio from peaking above -6dB with the Adobe encoder? I can take audio whose peaks go all the way up to 0dB and encode it with the Sonic Foundry encoder with no problem -- no clipping, no volume pumping, etc. Not so with Adobe Encore's implementation.
@Neil Wilkes:
> As far as Dialnorm goes, again I say it is pretty meaningless in a stereo file.
Dolby's encoding guidelines documents seem to say otherwise. In my readings, it seemed pretty clear that the decoder must have the dialnorm parameter set to the LAeq level of the dialog in the audio regardless of channel configuration.
> I suppose, although as long as the stereo mix is actually set up correctly there is no need to invoke DRC. The only time DRC would be needed on a stereo file is if the thing is too darn loud.
I have to disagree with this. There is a LOT of material that can benefit from DRC, both soundtracks that contain a large dynamic range (explosions to whispers), and soundtracks that have small dynamic range (speech). DRC doesn't have anything to do with the overall volume level of the soundtrack, but the dynamic range of the soundtrack. If the soundtrack is too loud overall, that's not a DRC problem, that's a level problem.
> In a properly balanced stereo file, there is no need at all for DRC or Dialnorm. There is no centre channel containing dialogue, just a phantom centre, so what are you going to reference it to, please? How can you attenuate the left/right channels with reference to the centre channel dialogue when there is no centre channel present?
Just because the dialog isn't isolated in the center channel doesn't mean you can't use it to set the dialnorm parameter. Plus, the decoder doesn't attenuate the left/right channels with reference to the center channel, it attenuates the entire soundtrack on playback.
Your quote from Dolby labs is very correct. Following that procedure ensures that the decoder, when it applies attenuation based on dialnorm and applies DRC will work as intended.
> Additionally, it is not referenced to average RMS either. RMS is close to the correct way to measure, but not correct.
That is true. However, I don't have any equipment to measure LAeq directly, so RMS of a dialog section of my audio will have to do. I do know this: When I applied to Dolby for logo usage on my DVDs, they requested samples of my DVDs for approval of my methods. My first submissions (where I didn't bother with dialnorm & DRC) were rejected, and Dolby sent me a letter telling me such. After I produced further DVDs using my method in my Doom9 post and resubmitted the DVDs to Dolby, they were approved. I can only conclude that my method, while not perfectly accurate, is good enough to qualify for Dolby's rigorous standards.
The bottom line is that I feel I have enough evidence to conclude that the DD encoder implementation in Encore is substandard. If you or anyone else feels it meets your requirements, then use it. But I for one will not allow a single DVD to go out from my company with audio encoded with this encoder.

How to encode Dolby Digital (AC3) 24 bit

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