Dolby Digital
Hardware entity
Supports Dolby Digital audio hardware.
27
games
6platforms
Alternate names: DD, Dolby Digital Sound System
WIN 2010-04-08
WIN 2002-12-03
SWTC 2018-02-16
XBOX 2003-11-18
WIN 2011-08-26
WIN 2005-03-29
WIN 2005-10-31
WIN 2004-09-20
WIN 2006-10-19
PS2 2004-11
WIN 2016-01-15
PS3 2013-04-26
Dolby Digital, like the name suggests, is digital instead of analog like the earlier Stereo, Dolby Surround and dolbyprologic2 Pro Logic II offerings from Dolby Labs. It can produce sound for a variety of speaker arrangements. Mono (Center), Stereo, dolbysurround Dolby Surround (Left, Center, Right, Limited Rear), 3 channels (Left, Center, Right), 3 channels (Left, Right, Rear), 4 channels (Left, Center, Right, Rear), quadrophonic (Left, Right, Rear Left, Rear Right)(perfect for emulation of quadrophonic arcade games), 5 channel (Left, Center, Right, Rear Left, Rear Right). The LFE (bass) channel is optional for all of these modes as a matrixed 0.1 channel, a full discreet channel, or not at all. Any of the rear channels have the option of being matrixed or discrete. The Dolby Digital system knows how to downmix any of these modes into a setup that does not have 6 speakers in the proper locations (only 1 rear speaker in the center, for instance, will mostly receive both rear channels while the front left and right channels will receive a bit of the signal to suggest the proper Left/Right mix). Whether or not your decoder knows how to tell the DD system which speakers are missing is a separate matter.
DD has a variety of synonyms, some of them are routinely used inaccurately.
DD, DD 5.1, Dolby Surround AC-3 Digital, Dolby Stereo Digital, Dolby SR-Digital, SR-D, Adaptive Transform Coder 3, AC-3, Audio Codec 3, Advanced Codec 3, Acoustic Coder 3, ATSC A/52 Rev B.
The audio undergoes digital lossy compressed before becoming a DD or AC-3 signal. It is decompressed for playback by the receiver.
The PS3, Xbox, X360 and some versions of the PS2 are all designed to be capable of outputting an AC-3 signal
On computer systems without special "Dolby Digital" hardware. The DD signal may by translated into PCM and output through a SPIDIF or TOSLINK jack. 'Digital Speakers' understand this PCM signal. Many home theater receivers do not.
Any videogame system with high quality sound output could theoretically output a prerecorded SPIDIF signal through one of it's normal audio channels. A Super NES, GP2X, N64, 3D0, Sega CD, Dreamcast, Saturn, Apple ][GS, Amiga, CD-i, Neo-Geo CD, GameCube, Jaguar, Nintendo DS, Pippin, Playdia, PS1, PSP, or Wii should be able to handle it.
Sound Related:
Dolby Digital Sound System
Dolby Surround (Dolby Pro Logic)
Dolby Pro Logic II (Dolby Surround 5.1)
Stereo audio
Redbook Audio (Compact Disc Digital Audio;CDDA)
Mockingboard soundcard
Miles Sound System (MSS)
KidVid audio player peripheral
Vorbis audio encoding
OpenAL (OAL;Open Audio Library)
Voice control (Audio input;Voice input;Speech recognition)
Supercharger audio gameloader
FMOD audio engine
Environmental Audio Extensions (EAX)
Environmental Audio Extensions 2 (EAX 2.0)
Environmental Audio Extensions 3 (EAX 3.0;EAX Advanced HD)
Environmental Audio Extensions 4 (EAX 4.0)
Environmental Audio Extensions 5 (EAX 5.0)
BASS audio library
AtariVox Speech Synthesizer
DD has a variety of synonyms, some of them are routinely used inaccurately.
DD, DD 5.1, Dolby Surround AC-3 Digital, Dolby Stereo Digital, Dolby SR-Digital, SR-D, Adaptive Transform Coder 3, AC-3, Audio Codec 3, Advanced Codec 3, Acoustic Coder 3, ATSC A/52 Rev B.
- 'SR' is an encoding process and has no effect on the decoder
- AC-3 is a specific bitstream format with a greater range than 'ordinary' DD. It is part of the DD specification. It allows for lower frequency sounds from all 6 channels, not just the subwolfer. The lower ranges are well below human hearing range and will be 'felt but not heard' on systems of sufficient quality. If your decoder only receives "Dolby Digital" and does not specifically receive full range AC-3, it will be downgraded to 'ordinary' DD. Decoders that accept full AC-3 often have separate connectors for "AC-3" and "Dolby Digital". Others allow the users to select the format manually. A few will 'figure it out' when the signal is received.
The audio undergoes digital lossy compressed before becoming a DD or AC-3 signal. It is decompressed for playback by the receiver.
The PS3, Xbox, X360 and some versions of the PS2 are all designed to be capable of outputting an AC-3 signal
On computer systems without special "Dolby Digital" hardware. The DD signal may by translated into PCM and output through a SPIDIF or TOSLINK jack. 'Digital Speakers' understand this PCM signal. Many home theater receivers do not.
Any videogame system with high quality sound output could theoretically output a prerecorded SPIDIF signal through one of it's normal audio channels. A Super NES, GP2X, N64, 3D0, Sega CD, Dreamcast, Saturn, Apple ][GS, Amiga, CD-i, Neo-Geo CD, GameCube, Jaguar, Nintendo DS, Pippin, Playdia, PS1, PSP, or Wii should be able to handle it.
Sound Related:
Dolby Digital Sound System
Dolby Surround (Dolby Pro Logic)
Dolby Pro Logic II (Dolby Surround 5.1)
Stereo audio
Redbook Audio (Compact Disc Digital Audio;CDDA)
Mockingboard soundcard
Miles Sound System (MSS)
KidVid audio player peripheral
Vorbis audio encoding
OpenAL (OAL;Open Audio Library)
Voice control (Audio input;Voice input;Speech recognition)
Supercharger audio gameloader
FMOD audio engine
Environmental Audio Extensions (EAX)
Environmental Audio Extensions 2 (EAX 2.0)
Environmental Audio Extensions 3 (EAX 3.0;EAX Advanced HD)
Environmental Audio Extensions 4 (EAX 4.0)
Environmental Audio Extensions 5 (EAX 5.0)
BASS audio library
AtariVox Speech Synthesizer