Creative SB X-Fi XtremeGamer og Dolby Digital/DTS

[SPiLL]

Har et Creative SB X-Fi XtremeGamer som er koblet med optisk kabel til forsterker. Alt virker knallbra, får Dolby Digital og DTS i avspilling av filmer (DVD).

I spill får jeg ikke Dolby Digital/DTS lyd. Har prøvd det meste, men forsterker går ikke i DD/DTS modus, men blir i stereo.

 

Så til spørsmålet

Har alle nyere spill DD/DTS støtte? Pleier det være egen opiton spillet for å aktivisere DD/DTS?

Endret 19. september 2007 av VistaGames

[Vikdal]

Dette er nok en option i lydmenyen for spillet. Tror ikke alle spill har støtte for surround.

[SPiLL]

Fant det her

Link

 

Digital Connections, SPDIF and Dolby Digital Info  Options      

 

Digital Connections

Digital 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) & DTS

Movies 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.

 

1) 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 Live! 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 Games

PC 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 DIN

You 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 Info

Creative's Speaker Conectivity Guide: http://us.creative.com/support/kb/article.asp?l=2&sid=5035

Dolby Surround info: http://www.dolby.com

 

Blir dårlig med DD/DTS i spill med optisk utgang. Jeg mener det finnes spill som alikevel har DD/DTS støtte.

Endret 19. september 2007 av VistaGames

[VikinGz]

spill til pc har vell bare ac3 (altså analog suround) xbox/ps2 og nyere har DD

For å få DD/DTS i spill på PC-en trenger du ett lydkort som encoder DD/DTS.

Dette kortet gjør nok ikke det.

Da vill du kunn få DD/DTS på filmer (dvd/br/hd-dvd)

Endret 19. september 2007 av VikinGz

[SPiLL]

Dette kortet her skal encode DD/DTS

Audio processor: C-Media CMI8770

Dolby Digital Encoding

DTS Encoding

Dolby Digital LIVE

Dolby Pro Logic II/IIx

DTS Connect

DTS NEO:PC

EAX 1.0

EAX 2.0

A3D 1.0

Direct Sound 3D

Speaker Shifter 7.1

 

These technologies will give anyone with a high-end audio setup something to shout about. They take your standard stereo audio and upmix them with crazy electronic trickery to 7.1 surround sound, encoded and set by single-cable (coaxial or optical). The X-Fi can do similar with its CMSS-3D feature which uses the shape of your ear to make stereo headsets sound like surround sound, or indeed go straight to surround sound speakers. However, this signal and upmixing can’t be shined out the S/PDIF port meaning that you have to use a whole load of cables, rather than one optical digitally encoded cable. The Theatron Agrippa can.

Link

Endret 19. september 2007 av VistaGames

[jlianes]

Det er vist enda forvirring på et område som egentlig er lett! DD og DTS får du i filmer fordi en i filmen vet hvor lyden kommer fra og programmerer det inn i lydsporet. Slik er det ikke i spill for spillet vet ikke hvilken vei en beveger seg. Det blir bestemt der og da. Derfor baserer spill seg på 3D lyd algoritmer som EAX og Direct 3D etc.... HVis du har et lydkort som encoder til MERK Dolby Digital LIVE eller DTS Connect så vil lydkortet gjøre om de digitale 3d algoritmene fra spill slik som EAX bruke informasjonen derfra til å plassere lyden riktig i hjemmekino oppsettet. Det som skjer er altså en konvertering av digitale formater fra EAX eller Direct 3D til DD eller DTS lyd. dessverre støtter ikke Creative hverken DD Live eller DTS connect. Det gjør derimot en god del integrerte lydløsninger fra REaltek og Soundmax. Du finner gjerne disse lydbrikkene på dyre high end hovedkort. Det finnes også stand alone lydkort som støtter disse standarene. Merk altså at det holder ikke at lydkortet støtter DD og DTS. Kortet må støtte DD Live DTS Connect.

[SPiLL]

Takk for svar

Endret 19. september 2007 av VistaGames

[oceana]

Beklager å "kapre" tråden, men jeg har akkurat kjøpt meg samme kortet, og lurte på om noen kunne hjelpe meg med kontakter og overganger til kortet...

Jeg vil helst bruke den optiske utgangen, men den kabelen jeg har er av den "firkantede" typen (toslink?) - noen tips om hvilken overgang jeg trenger for å få den inn i mini-jack'n ?

Overgangen jeg trenger er tilsvarende inngangen på anlegget mitt;

Logitech innganger

 

Har sett et par eksempler rundt omkring som jeg tror kunne passa, men disse var svindyre.

Skal bruke kortet sammen et logitech z-5500, noen med erfaring / tips rundt det?

 

Det skal også nevnes at jeg har Abit IP35 HK, med Realtek lydkort; det har optisk SPDIF utgang av den typen jeg ser etter...bruker det nå foreløpig, og syns det leverer greit.

"Trenger" jeg X-fi kortet, eller er det veldig overlegent Realtek?

Endret 21. september 2007 av oceana