The numerous surround sound codecs to be had on modern AV receivers can seem puzzling.
Dolby Digital, DTS and THX listening modes are all to be had to system your audio, but what is the difference and what do all of them do?
On this page, I listing some of the audio decoding and processing codecs you'll locate for your hardware and give some information as to while you may use them.
You may also encounter other audio formats further to those indexed here, but these are the maximum common and well-used.
Dolby Digital EX
A Dolby Digital EX enabled receiver can decode this kind of codec and accommodate an additional surround speaker for a 6.1 setup. If there may be no more surround speaker attached to the receiver, then it'll routinely play the 5.1 model.
Dolby Digital Plus
This codec is elective for Blu-ray and extends Dolby Digital to 7.1 surround sound. Therefore, this feature may be present on a receiver that helps 8 surround channels.
Dolby TrueHD
This sort of audio might be detected automatically with the aid of an AV receiver if it has an onboard decoder. If decoded by using the AV receiver, this codec may be despatched over HDMI 1.3 as a bitstream from the Blu-ray player, and the front panel will display 'Dolby TrueHD'. However, the ability of AV receivers to decode this layout is not common.
Dolby Atmos
However, starting in 2014, some Blu-ray disc releases commenced seeming with a Dolby Atmos soundtrack. They are actually more not unusual on new releases, despite the fact that no longer established. Dolby Atmos is the first codec launched that was object-primarily based - because of this that a legitimate object can be located in a greater precise role in the sound-field and isn't tied to a particular channel.
Dolby Surround
Dolby Surround is an upmixing set of rules. It will take a preferred surround mix and create the more channels that your system supports.
So, if you have two (or more) peak speakers hooked up on your AV receiver, then Dolby Surround will create channels for them from a 5.1/7.1 soundtrack