Dolby Pro-Logic II
This is one of many surround sounds created by Dolby Laboratories (AKA: Dolby Labs; Dolby). Officially the surround sound that really started it all for having a home theatre, Dolby Pro-Logic, is no longer even mentioned on Dolby’s official site at the time of this posting.
For info on the original Dolby Pro-Logic read my post titled “Dolby Pro-Logic Revisited.“
Later on Dolby made variants of Pro-Logic with three formats; Pro Logic II, IIz and IIx. This post will explain the differences between them.
According to Dolby:
“Dolby Pro Logic II transforms traditional stereo audio into 5.1-channel surround sound for a seamless listening experience full of presence and depth.”
This above quote and more about this format can be found here on Dolby’s official website.
Pro Logic IIz adds more depth to the sound heard.
Pro Logic IIx adds listening modes to further customize how you hear everything.
DTS Surround Sound Formats
Listed below is the complete listing of the surround sound formats available from DTS:
DTS Stereo Plus
DTS TruVolume HD
DTS Studio Sound
DTS-HD Master Audio
DTS Digital Surround
DTS:X Pro is an advanced decoder technology package for home cinema customers that supports up to 30 connected speakers and 2 subwoofers for a total of 32 output channels. Built upon the DTS:X decoder, DTS:X Pro includes the advanced DTS Neural:X spatial remapping engine and a powerful object renderer to deliver pristine audio with pinpoint accuracy in premium immersive audio installations. Enjoy breathtaking audio from every speaker for the ultimate immersive listening experience in the home.
DTS:X®, DTS’ flagship object-based audio decoder, includes object-based audio decoding, full backward compatibility with all DTS-encoded formats, and Neural:X, the latest spatial remapping technology that translates legacy bitstreams and PCM content to virtually any speaker layout.
DTS Virtual:X bridges the gap between our DTS:X codec and the reality of so many consumers’ homes, allowing you to enjoy multi-dimensional sound regardless of room size, layout, or speaker configuration.
DTS Play-Fi® was designed with one goal in mind: to bring music home again. While it’s great to be able to hear any song, any time, anywhere from a device that fits in your pocket, it s even better to enjoy that music out loud with amazing detail when you come home. With DTS Play-Fi, you can finally do just that. It’s not just the ease and power of wireless listening; it’s the unprecedented freedom to find this experience in all kinds of products from the brands you love.
DTS Sound™ for Bluetooth, Wi-Fi and Smart speakers enables greater clarity and impact from small-form-factor devices. DTS Sound is designed to maximize the performance of even the smallest speakers. DTS Sound delivers depth, detail and loudness, while minimizing distortion at high volumes. Other features include bass enhancement technology for warm bass tones and dialog enhancement to improve vocal clarity.
DTS Stereo Plus is the perfect solution for stereo Bluetooth, Wi-Fi and Smart speakers. Featuring spatial processing technology developed by DTS, Stereo Plus packs lush, natural sound into a small form factor, providing a wider and deeper soundstage from stereo speakers placed in a single enclosure. Other features include a new limiter for distortion-free listening, bass enhancement technology for warm bass tones and dialog enhancement to improve vocal clarity.
DTS TruVolume HD technology is a real-time loudness leveling technology with support for stereo and 5.1 that measures and regulates perceived loudness differences to create consistent audio output that matches a configurable target loudness level. Eliminate those annoying fluctuations in volume while watching and listening to content. DTS TruVolume HD responds in real time to different sources and types of content to maintain consistent loudness.
DTS Studio Sound™ post-processing creates virtual surround sound for an immersive surround experience. Volume Leveling smooths transitions between sources and when changing channels while bass enhancement improves bass perception for a more dynamic experience. Speaker EQ lets you maximize performance of the system and Dialog Enhancement improves dialog clarity in soundtracks. The Single Band Hard Limiter helps protect the system from overload and damage.
DTS-HD Master Audio™ is a premium 5.1/7.1 high-definition audio codec that is bit-for-bit identical to the studio master.
DTS-HD digital surround audio decoder with output up to 5.1 channels for streaming file-based and disc-based DTS-encoded media featuring adaptive streaming for smoothing streaming bandwidth fluctuations and compatibility with layered audio to provide efficient encoding.
DTS Digital Surround™ audio decoder with output up to 5.1 channels for streaming, file-based and disc-based DTS-encoded media.
DTS (DTS, Inc.). You can learn more about them at their official website for home theatre.
The description used for this sound format was taken directly from DTS’s own site for the most accurate description available.
This article was up to date at the time of writing it. After publishing the article it is possible that they may have added additional formats that I did not know about at the time. I will do my best to update this page as necessary.
This surround sound is also known as 5.1 channel surround sound and also commonly referred to as “AC-3.” This is one of many surround sounds created by Dolby Laboratories (AKA: Dolby Labs; Dolby).
This was a major milestone when this was created because it took Dolby Pro-Logic to a whole new level and is still considered to be the industry standard as a minimum surround sound used in all modern films despite being created in 1992.
What you need for this:
The official speaker setup guide can be found here.
For more information on this surround sound click here.
This post is all about how sometimes smaller surround sound formats can be better. 9.4 channel surround and some variations are what will be discussed today. For the record none of these surround sound formats have been built and tested. Instead they are merely thoughts that popped into my head and I wanted to publish before I forget them. Perhaps someday I will in fact test them.
- Why not try a 5.1 channel receiver with the standard wiring setup and then add this? Add a pair of ceiling height speakers (front left and right) and a pair of ceiling height speakers (rear left and right). It’s not super exiting, but its simple enough – just add speaker switches to allow for the additional speakers. Use two ‘y’ cables for the 4 powered subs. Now this ends up being a 9.4 channel surround system. Use satellite speakers and only one receiver.
- Take a 7.1 channel receiver and wire it up this way instead! Front left and front right each will be done as two pair of speakers (one at ceiling height and one at ear level), connect the remaining speakers (front center, rear center) as the owners manual says to do. The left rear and right rear will require a speaker selector (switch) box so they can allow for a middle center sitting either at ceiling height or on the floor aimed up towards you (your choice). Use four powered subs. This ends up being another version of a 9.4 channel surround sound system.
- Skip the side speakers since not much comes out of them anyway and try this variation? Using a 7.1 channel receiver wire it up like the manual says to. When it comes to the side speakers place the speakers not in the back like they suggest and not on the sides like I always suggest. Instead place these speakers as middle centers. Now you are still using a 7.1 channel receiver but simply change where a pair of speakers go? This will perhaps improve the sound. Of course I recommend 4 powered subs instead of one making it into a 7.4 channel surround sound system. As a bonus why not add in a rear center by utilizing a single speaker selector switch off of the rear speakers on the back of the receiver. Connect it to either the rear left or rear right and connect two speakers to it. Place those two speakers side by side as if the two were one big rear center.
All of these suggestions will give you custom 9.4 channel surround sound system (except option number 3) that just might sound amazing or perhaps it wont – you can never really be sure until you test it!
Let me know what you think.