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Dolby Digital includes several similar technologies, which include Dolby Digital, Dolby Digital EX, Dolby Digital Live, Dolby Digital Surround EX, Dolby Digital Plus, and Dolby TrueHD.

Dolby Digital, or AC-3, is the common version containing up to six discrete channels of sound. The most elaborate mode in common usage involves five channels for normal-range speakers (20 Hz – 20,000 Hz) (right front, center, left front, right rear and left rear) and one channel (20 Hz – 120 Hz allotted audio) for the subwoofer driven low-frequency effects. Mono and stereo modes are also supported. AC-3 supports audio sample-rates up to 48 kHz. Batman Returns was the first film to use Dolby Digital technology when it premiered in theaters in Summer 1992. The Laserdisc version of Clear and Present Danger featured the first Home theater Dolby Digital mix in 1995.

This codec has several aliases, which are different names for the same codec:

* Dolby Digital (promotional name, not accepted by the ATSC)
* DD (an abbreviation of above, often combined with channel count: DD 5.1)
* Dolby Surround AC-3 Digital (second promotional name, as seen on early film releases and on home audio equipment until about 1995/1996)
* Dolby Stereo Digital (first promotional name, as seen on early releases, also seen on True Lies LaserDisc)
* Dolby SR-Digital (when the recording incorporates a Dolby SR-format recording for compatibility)
* SR-D (an abbreviation of above)
* Audio Coding 3 (relates to the bitstream format of Dolby Digital)
* AC-3 (an abbreviation of above)
* Audio Codec 3, Advanced Codec 3, Acoustic Coder 3 (These are backronyms. However, Adaptive Transform Acoustic Coding 3, or ATRAC3, is a separate format developed by Sony)
* ATSC A/52 (name of the standard, current version is A/52 Rev. B)

Posted on Jun 16, 2009

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Can't access Dolby digital surround mode on my rca home theater system. Using hdmi cables but only getting Dolby prologic settings.


From where is the signal coming?. If it's a PlayStation, Xbox or bluray player settings may be needed in order for it to operate in the desired way.
Also the content has to support Dolby Digital like a tv show even if the receiver had DD the program also has to be in DD.
A lot of new players such as Fire Tv, Apple TV or Roku now send a Dolby Digital Plus signal which only newer-ish support. It's sort of a blanket signal that covers Dolby Digital but won't read as such. It will display as Dolby Digital Plus.
I can help with settings if you give details on the devices. Receiver type. Media type.

Mar 05, 2017 | RCA Audio Players & Recorders

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UNABLE TO POWER UP


Check for a bad fuse inside the receiver.

Jun 20, 2015 | Yamaha AVENTAGE RX-A1030 3D A/V Receiver -...

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How do I get the C5 Subwoofer to activate?


Hello
If subwoofer is inactive now, the sound preference settings you set now is wrong.

Before using the remote control for the following
operation
* Set the remote control mode selector to AUDIO

** There are exceptions in the operation mentioned
above. In such a case, follow each instruction

Dolby Pro Logic II*1

# Dolby Pro Logic II has a newly developed multichannel playback

format to decode all 2 channel sources - stereo source and Dolby

Surround encoded source - into a 5.1 channel.

Dolby Pro Logic II has two modes - Movie mode and Music
mode

# Pro Logic II Movie (MOVIE)
Suitable for reproduction of Dolby Surround encoded sources

# Pro Logic II Music (MUSIC)
Suitable for reproduction of any 2 channel stereo music sources

# Dolby Digital*1

Used to reproduce multichannel soundtracks of the software
encoded with Dolby Digital

# DTS Digital Surround*2

Used to reproduce multichannel soundtracks of the software

encoded with DTS Digital Surround. DTS Digital Surround (DTS) is another discrete multichannel
digital audio format available on CD and DVD software

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1 Answer

How do i get dolby digital to work on my kenwood vr0405 reciever?


Make sure your source is playing something that has been recorded in dolby digital, not all dvd's and tv boxes transmit dolby digital. what is your source?

Dan

Dec 27, 2009 | Kenwood VR-405 Receiver

1 Answer

Wil not switch to dolby digital mode


You must use optical sound wire in order to reprduce dolby digital......You should have 2inputs on the back for this......plus the signal must be broadcasted in dolby digital.Such as HBO,SHOWTIME....they will tell you before the show comes on whether or not the movie or event is being broadcasted in dolby digital.Your unit will automatically change to dolbly digital once the show or event starts.Just make sure your input on video1,2,or3 is set to optical1 or 2.Just press the "Audio Sel" on the remote to change the audio source.But make sure the optical wire is connected first.....And just incase,make sure you are sending a dolby digital source to the unit from the sat reciever,cable box,playstation2.....make sure the dolby digital/optical option is on.You can find out what audio options you have in the menu screen.........or the redneck way.look on the back of the sat reciever/cablebox/playstaion2 ect...for a red laser light comming from these units.........i hope tht helps.

Feb 20, 2009 | Onkyo HTR500 Receiver

1 Answer

No dolby digitaL ON BLU-RAY FIMLS played thro a ps3,


prologic is a form of dolby digital, the 4.0 or 5.1 (versions I and II respectively) to be exact. the type of dolby version is determined by the source disk. the reciever may expand a dolby digital signal into 7.1 but it is actually a 5.1 standard, as is prologicII

Nov 28, 2008 | Denon AVR-3801 Receiver

1 Answer

No Audio when I play Blu-Ray discs with Dolby TrueHD


For dolby digital to work you have to have the optical or coax cable hooked up to the reciever ,The HDMI cable is for digital video and audio output but does not support dolby digital out the cable into your reciever , so just turn off the dolby digital on your reciever and you should hear the sound.
here is more info

Dolby TrueHD is an advanced lossless multi-channel audio codec developed by Dolby Laboratories which is intended primarily for high-definition home-entertainment equipment such as Blu-ray Disc. It is the successor to the AC-3 Dolby Digital surround sound codec which was used as the audio standard for DVD discs. In this application, Dolby TrueHD competes with DTS-HD Master Audio, another lossless codec from Digital Theater System.
Dolby TrueHD uses Meridian Lossless Packing (MLP) as its mathematical basis for compressing audio samples. MLP was used on the earlier DVD-Audio format, but details of TrueHD and DVD-Audio differ substantially. A Dolby TrueHD bitstream can carry up to 14 discrete sound channels. Sample depths up to 24 bits/sample and audio sample rates up to 192 kHz are supported. Like the more common legacy codec Dolby Digital, TrueHD bitstreams carry program metadata. Metadata is separate from the coding format and compressed audio samples, but stores relevant information about the audio waveform. For example, dialog normalization and Dynamic range compression are controlled by metadata embedded in the TrueHD bitstream.

May 19, 2008 | Marantz SR-7200 Receiver

1 Answer

Yamaha htr-5240 dolby digital problem


Is there switch from dolby pro logic/ surround / or analog/ digital?

Sep 27, 2007 | Yamaha HTR-5240 Receiver

1 Answer

Hook up your Xbox to a Dolby Digital Decoder


Xbox® is the first and only game console to support in-game Dolby® Digital 5.1 surround sound. This lets you experience all the game sounds from your home theater system in full 5.1 surround. Before you get started, make sure you've got the following: A digital audio output. A free optical digital input on your receiver. An optical digital audio cable. Digital Audio Output Your Xbox didn't come standard with a digital audio output, but you're gonna need one for this to work, so hightail it to the store for the Advanced AV Pack or High Definition AV Pack, both of which have digital audio outputs. Microsoft makes both of them. You can also buy third-party AV cables for Xbox?but make sure they have a digital audio output. Free Optical Digital Input For this slammin' sound system to work properly, you need at least one free optical digital input on your receiver. Ready to Hook It Up? Let's Go! Connect the digital audio output to your Xbox. Connect one end of the optical digital audio cable to the digital audio output on your Xbox and the other end to the optical digital input on your receiver. Turn on your Xbox with no disc in the disc drive. In the Xbox Dashboard, select Settings. Select Audio. You will see an Audio Mode screen that shows Dolby Digital and DTS status. Select Dolby Digital. You will see the question "Does your stereo system support Dolby Digital Audio?" Select Yes. You will see Dolby Digital Enabled in the audio screen. Your Xbox is now ready for Dolby Digital gameplay. Insert a game disc and play!

Nov 20, 2005 | Microsoft Xbox Console

2 Answers

Hook up your Xbox to a Dolby Digital Decoder


Xbox® is the first and only game console to support in-game Dolby® Digital 5.1 surround sound. This lets you experience all the game sounds from your home theater system in full 5.1 surround. Before you get started, make sure you've got the following: A digital audio output. A free optical digital input on your receiver. An optical digital audio cable. Digital Audio Output Your Xbox didn't come standard with a digital audio output, but you're gonna need one for this to work, so hightail it to the store for the Advanced AV Pack or High Definition AV Pack, both of which have digital audio outputs. Microsoft makes both of them. You can also buy third-party AV cables for Xbox?but make sure they have a digital audio output. Free Optical Digital Input For this slammin' sound system to work properly, you need at least one free optical digital input on your receiver. Ready to Hook It Up? Let's Go! Connect the digital audio output to your Xbox. Connect one end of the optical digital audio cable to the digital audio output on your Xbox and the other end to the optical digital input on your receiver. Turn on your Xbox with no disc in the disc drive. In the Xbox Dashboard, select Settings. Select Audio. You will see an Audio Mode screen that shows Dolby Digital and DTS status. Select Dolby Digital. You will see the question "Does your stereo system support Dolby Digital Audio?" Select Yes. You will see Dolby Digital Enabled in the audio screen. Your Xbox is now ready for Dolby Digital gameplay. Insert a game disc and play!

Nov 20, 2005 | Microsoft Xbox 360 Console

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