So, you have become a happy owner of 5.1-channel computer speakers (AC / acoustic system / acoustics) and correctly connected them to the sound card. What's next? In this note, I will tell you in detail and "pictures" point by point how to correctly and quickly configure sound in windows 7 using the Control Panel and the Realtek HD audio manager. In the last paragraph, I will also mention the rating South Korean media player PotPlayer. Who is interested - read further after the button of the same name.
1. Let's start our brief digging into the settings by calling the "window" control panel ("Start" → "Control Panel"). Find and open the parameter (applet) "Sound" → then, on the main tab "Playback" we designate the playback device as "Speakers" ("Speakers") → at the bottom left click on the button "Configure" (see first screenshot). In the window that opens, in the "Sound Channels" list, select "5.1 Surround Sound", after which we will not forget to click on the "Check" button (of course, all speakers should produce sound). After passing the test, let's move on to the next settings, where you need to specify which speakers will be full-range, rear, etc.
2. Having properly configured the speakers and clicking on "Finish", we will return to our multi-tab "Sound" window → selecting "Speakers" again, look at "Properties" → in the "Properties: Speakers" window on the "Improvements" tab, check the box next to " Environment", confirming the change with the "OK" button (screenshot). This completes our manipulations with the "Sound" applet.
3. Now let's open the Realtek audio manager (see in the control panel windows parameter"Realtek HD"). On the "Speakers" tab, select the "5.1 speakers" configuration → check in the same place that the items "Virtual environment" and "Control connection" are activated low frequencies". Close the dispatcher with the "OK" button (screenshot), and the control panel - of course, with a "cross".
Note: You can download the manager with the Realtek sound card driver package from the official website here (see "High Definition Audio Codecs (Software)").
4. If media files on your system are not opened by built-in (windows media player), and a third-party player, then the final "digging" will be changing the channel settings from stereo to "5 + 1". For example, for the test winner "Choosing the best media player for windows OS: comparative review programs for playing audio and video files "Daum PotPlayer" digging "are as follows: when running program press F5 ("Settings") → on the "Audio" tab in the "Speakers" setting, change "2.0 stereo" to "3/0/2 + LFE - 5.1 channels" → "OK" (screenshot).
Actually, this is all - not too difficult and long. All that's left is to experience surround sound by playing your favorite Dolby Digital (DTS) movie.
Dmitry dmitry_spb Evdokimov
TestSoft.su
Setting sound 5.1 in windows 7
Surround sound lovers - hello! The setting can be done using the control panel as well as the Realtek Sound Manager. Open Start > Control Panel > Sound. Find a tab called "Playback" there, then highlight the "Speakers" icon and go to "Customize". If you see a green arrow there, it indicates that this device is currently in use.
Initially, you should check if you have a codec for playing and sound settings at all. If not, you can download realtek for windows 7 at any time. Those who have already downloaded realtek hd for windows 7 and 8 will not have to spend a lot of time setting it up, the sound will now be excellent.
In the window that you have opened in the list, you should find "Surround Sound 5.1" and there click on "Check". After that, you should hear sound from all speakers. It is also important to note that if you do not hear sound from all the speakers, then you can try choosing "7.1 Surround Sound" instead of 5.1.
After you pass the test, then click on "Next". Next, you will need to select in the settings which speakers should be rear, full-range, side, etc. When you finish working with the wizard, you will again need to select the "Speakers" icon and go to "Properties". After finding the "Properties: speakers" window, go to the tab called "Additional features" and there check the box "Virtual surround sound", and then click the "OK" button. After that, you can check the parameters of the installed sound effects again.
coolinfoo.ru
Setting up surround sound in windows 7 and windows 8
Hello dear readers. Today's article will be especially helpful for music lovers as I will show you how to set up surround sound in the operating room. windows system 7 or 8.The first thing you will need is to purchase speakers and a good sound card. Let's assume that you already have these two components. Then, be sure to install the drivers for the sound card. You can find out the name of your "zvukovuha" using the "Everest" program or any other similar program.
Next, we connect the previously purchased stereo system to the computer. To achieve better sound quality, I would recommend using a 7.1 system, but 5.1 is fine too. Connecting a 5.1 stereo system to system unit carried out in the following outputs:
- Orange - subwoofer and center speaker;
- Green - front speakers;
- Black - rear speakers.
The Sound dialog box will open, showing you the devices connected to your computer to output sound. Make sure the sound device you want to configure is set to "default".
Now a new "Setup Speaker" dialog box will open. In my case, two channels appeared in the list of audio channels: Stereo and 5.1 Surround. In your case, it may be 7.1 Surround or some other name. It only depends on the equipment you have connected. Selects the 5.1 Surround channel. If you just set the Stereo value, then only two columns will “light up” on the image in the window, if 5.1 - four additional columns will be added and 7.1 - five additional columns will be added
speakers. 
Then I recommend testing by clicking on the "Test" button. At the end of testing, click "Next" and go to additional settings surround sound in windows 7 or 8. I advise you not to change anything much here, because operating system adjusts automatically for optimal performance.
At the very end, you will receive a message that the setup was successfully completed. Click the "Finish" button and you will finish setting up surround sound in windows 7 or 8.
Using this small instruction, you will be able to do everything yourself, without resorting to calling wizards or special services. In the end, I would also like to recommend that you read the article that was previously published on our website, about one very useful program, with which you can convert the sound in your favorite mp3 tracks from mono to stereo and vice versa, from stereo to mono in a matter of minutes.
vgtk.ru
Setting up 5.1 sound via S / PDIF in windows 7
There is a computer with Win 7 on board There is a 5.1 receiver with support for DTS and DolbyDigital When connected via a digital output, the sound comes only in stereo mode At the same time, for movies with DTS or DD tracks, 5.1 works only in windows Media Player Movies with regular 5.1 tracks are played back as stereo. When connected via analog, everything is ok. How to enable 5.1 by default system wide? - Sound card - built-in Realtek ALC888/1200 Receiver Kenwood KRF V4070
latest version of Klite and AC3Filter
- Question asked over 3 years ago
- 31880 views
- I solved the problem by purchasing a sound card with DOLBY DIGITAL LIVE support! (Creative audigy 4) and the actual library of the same name on off. manufacturer's website. Satisfied, I advise.
Thanks for answers.
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- 5.1 worked great for me for movies in VLC (in the settings, select "All Options", the Sound section, the "Use S / PDIF if available" checkbox). For the entire system is unlikely to succeed. Like Comment
- "Movies with regular 5.1 tracks" - what are these ordinary ones? Multi-channel tracks for movies can be encoded in different formats (DTS, DolbyDigital, etc.). If the track standard matches the capabilities of your receiver (a bunch of all sorts of icons on the front panel), then it will play multi-channel sound. If this is a game or something else other than what it can decode, then you will not hear anything. The sound card in this case can reproduce the whole thing because its capabilities are not limited to DTS or DolbyDigital. - Similarity of the solution: The receivers have modes of virtual decomposition of stereo signals into all 5.1 channels. Usually this is Dolby ProLogic or similar. Check the instructions for your receiver. Then you will have all 5 speakers playing, although the input signal will be stereo.
And yet, by default, AC3Filter does not seem to have an option for signal output to SPDIF.
Like Comment
- Good day! I decided not to create a new topic, the question is almost the same. there is an LG TV 42" with S/PDIF output on board, a PC with a Sound Blaster X-Fi Xtreme Audio PCI Express sound card on board S/PDIF in, analog 5.1 speakers. We want to watch DTS movies with 5.1 sound. everything is OK with TV, the output from the computer is also OK, but the input is only stereo firewood, everything is there.
set up (3-4 years ago) everything worked but the other day I reinstalled Windows and sailed, I remember I also suffered for a long time, help with advice where to dig
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acoustic system 5.1 what it is? How is 5.1 different from 2.1 or 2.0? What is better 5.1 or 2.1? And in general, what's the point of installing a 5.1 system and how to connect it?
You may have noticed that both computer speakers and TV-connected speakers come in different configurations, meaning the number of individual speakers used in a particular system. Someone has only two table speakers, another has two speakers on the table and another subwoofer, and the third has six elements of the speaker system or even more. This difference indicates the use of different speaker circuits. What does it mean? This means that a system with two desktop speakers is a 2.0 system. the speaker system has two speakers (two channels) and no subwoofer, which is why it is designated as 2.0. Accordingly, if the system has two speakers and a subwoofer, then this is 2.1 acoustics. In the case of using two front speakers + two rear (or side) + center channel + subwoofer, it turns out that there are six elements in the system, and it is designated as 5.1.
What is better 5.1 or 2.1? The answer to this question will most likely be subjective, since everyone has their own needs for listening to music or watching movies. For some, desktop computer speakers are enough, while others will choose a multi-channel system for a long time and carefully, and they are not averse to spending several tens or even hundreds of thousands of rubles on it. In terms of sound, 2.0 or 2.1 systems transmit stereo sound through two speakers, which are usually placed in front at the edges of the listener. The 5.1 system surrounds the listener in a circle, in addition to the front side speakers like in 2.1, the center channel is installed in the front in the center and two more speakers at the rear along the edges plus a subwoofer. This configuration gives a surround sound that surrounds the listener and, as it were, places him inside the plot (when watching a film), adding to the viewer the effect of the presence and reality of what is happening on the screen.
As for the technical part, how connect 5.1 and how to set it up? There are several nuances: the first is that the music of the mp3 format, which is most often used, is, as a rule, stereophonic, i.e. the sound is intended for playback in a 2.0 or 2.1 system and does not have a breakdown into additional channels, you can get around this, more on that below; the second - the sound from the Internet, played through the browser, has the same problem as in the first case, but here you still need to be able to configure the browser itself, more on that below; third - movies, for full-fledged multi-channel sound, you need the corresponding multi-channel track in the movie file (this does not seem to be a problem, but this must be taken into account when choosing a movie).
Further down the line, the 5.1 speaker system has three pairs of tulip-type (RCA) input jacks. A pair for the front speakers, a pair for the rear speakers, and a pair for the center channel and subwoofer. The connection between the PC and the acoustics takes place with the help of three cables, on one side which have “tulip” connectors, which are just connected to the speaker jacks, and on the other, a 3.5 jack plug. It turns out that a PC or a TV (dvd player) should have three connectors for connecting a “3.5 jack” or three pairs of tulip connectors (between acoustics and a dvd player, the connection goes through cables on both sides of which have “tulips”). In the case of dvd, everything is clear, there should be these connectors on the rear panel (if, of course, the player has such a function). But on a desktop computer, or even more so on a laptop, you will find three jack 3.5 connectors designed specifically for acoustics connection 5.1, a rarity (on stationary PCs, do not confuse with green, blue and pink connectors, which, respectively, are responsible for connecting 2.0 acoustics or headphones, a line input for connecting external subsystems and an external microphone).
How to connect a 5.1 system to a laptop or desktop PC if not desired connectors? You need to buy a suitable sound card that supports 5.1 acoustics. In the case of a stationary PC, this can be either internal, connected directly to motherboard, and an external sound card. In the case of a laptop, this will be an external sound card connected to the laptop via a USB cable. You can buy such a sound card in a regular store or order it, as a rule, cheaper on AliExpress, I’ll leave the link here: 5.1 sound card on AliExpress.
So, you bought a 5.1 sound card and now you need to connect and configure it. Further I will explain using the example of a sound card from AliExpress, which is found in blue or black.
- plug the tulips of the cord coming from the GREEN “front out” connector of the sound card to the 5.1 system into the corresponding color jacks for the “tulips” of the channel responsible for the front right and left speakers (in the case of the picture, these are R and L, related to 5.1);
— connect the tulips of the cord coming from the BLACK “rear out” connector of the sound card to the 5.1 system into the corresponding color sockets for the “tulips” of the channel responsible for the rear right and left speakers (in the case of the picture, these are SR and SL);
- connect the tulips of the cord coming from the ORANGE "cen / bass out" connector of the sound card to the 5.1 system into the corresponding color sockets for the "tulips" of the channels responsible for the center channel and the subwoofer (in the case as in the picture, these are C and SW).
Multichannel audio.
Now let's talk about the nuances described above. As already mentioned, mp3 music does not have a breakdown for playback in 5.1 systems, and in fact, when playing such files, we get division through all channels using software methods. Not everyone has a breakdown for all channels when playing with standard players, so you can install the JetAudio player and set “Environment (Multi-channel sound)” in its settings. In general, you need to look for music in a multi-channel format and listen to it.
5.1 sound in the browser.
The second nuance is about playback through the browser. Not every browser will immediately play sound 5.1, it often happens that only two columns work when listening through the browser. Therefore, the browser must be configured to play 5.1. To set up 5.1 in Opera, you need to insert “opera: flags” into the address bar, and then look for settings related to audio (previously, the problem was solved by turning on the “Non-default channel layouts for audio output streams” flag). Time goes by, Opera is being updated, and maybe it will work for someone right away. In any case, there are a lot of discussions on the Internet about this, I think there is a solution somewhere.
For settings 5.1 in Chrome, you need to insert “chrome://flags” into the address bar, find and enable “#try-supported-channel-layouts”. The browser must be restarted for the changes to take effect.
Nuance in USB Multi-Channel Audio Device settings
Another nuance is related to the effect settings on the "Effect" tab in the "USB Multi-Channel Audio Device". For some reason, when setting the ambience settings, the ambience sizes and the equalizer, the sound in all channels except the two front ones starts to become very muffled, and therefore, it seems that the system is operating in 2.0 mode. You can solve this problem by adjusting the volume level of each speaker using the knobs under the number 2 in the previous picture.
Thus, here I have outlined all the problems that I had to face when setting up my 5.1 system, but as a result, all players and browsers, music and movies that I use and turn on, work in 5.1 sound mode.
After buying acoustics with support for 5.1-channel sound mode, I ran into a number of problems. Simply put, 5.1 mode did not work in Windows 10, out of five columns only 2 worked, and even then in compatibility mode. At first I thought it was all Google Chrome(which controls the sound itself), but no, you had to know one feature when setting it up. In continuation detailed instructions how to set up 5.1 sound on windows 10.
First you need to check which sound card is installed on the PC. To do this, go to the "Device Manager" and find the item "Sound, game and video devices" (this can be done by right-clicking on the "Start" button, "manager" will be the fifth from the top). If the sound card is from any manufacturer other than VIA Audio, skip the next step.
If the sound card is manufactured by VIA Audio, then before setting up it is necessary to install the drivers of the version: "VIA HD Audio v 11.11.00" (you can download it from the link). However, the VIA programmers messed up something and wrote the wrong one to the built-in mixer, so after downloading the archive with the drivers, we simply unpack it into any folder. After you need to go to the "Device Manager", then in the "Properties" of the built-in sound card, find the "Driver" tab and click on the "update driver" button. Then "Search for drivers on this computer". Then select the folder with the unpacked drivers from VIA. After successful installation, restart your PC.
To set up 5.1 sound on Windows, you need to go to the "Playback Devices" tab (right-click on the volume icon in the Windows tray). Next, select the speakers we need and click on the "Settings" button in the lower left corner. Next, and this is very important, you need to select the 7.1 sound mode !, then click "next" and uncheck the "side pair" of speakers. Then just click "next-next" and exit the settings window. 5.1 sound activated, congratulations.
It is also necessary to configure the virtual surround sound mode so that when playing files with stereo sound, not 2 speakers work, but all 5. To do this, go to the "Properties" section (button in the lower right corner). There is a tab "Enhancements", where there is a list of different modes, we are interested in the "Enable Speaker Fill" mode - check the box opposite. This completes the sound setup.
Whether you're setting up your 2.1, 2.0 computer speakers, or a complex 5.1 home theater system, setting up channels, acoustics, and placement is the most important step in enjoying your new sound system. Read on as we give you a crash course in surround sound setup.
Why should this bother me? Why do I need to set up 5.1 acoustics?
A long time ago a friend of mine made a big purchase and bought a new led panel, as well as a smart, powerful receiver and new acoustics. At that time, he researched tirelessly, wandered through the forums and still made his purchase, spending most of Money on a chic, powerful receiver and a small part on 5.1 speaker systems (pretty).
When it came time to connect the acoustics in the prescribed manner, my friend simply placed all the 5.1 acoustics right on the shelf under his new TV.
Then he called me and said that the acoustics in cinema 5.1 are “complete rubbish, hammering as it should, but there are no effects at all.” When I came to his house, I laughed for a long time when I saw such a picture, but then I arranged his 5.1 acoustics in the proper order and set everything up.
After this setup, I invited my friend and showed on some test movies how the 5.1 system sounds, my friend's face became joyful, by the way, a little later my friend bought all the same a normal 5.1 system and replaced the poor one with a good cinema projector. 
There are a huge number of acoustics for home theater. All of them add sound effects to films - all of which contribute to recreating realistically pleasing sound in your .
In order to take advantage of all that energy put into producing amazing soundtracks and movie ratings, you have to do your own tuning. Don't worry, we've already done the research for you. Just follow along with us as we explain what each speaker does and where to best place it.
To begin our speaker placement, let's first start with the most well-known audio setup, a simple stereo sound. When you listen to your player or smartphone with a pair of headphones, or listen to the radio, you hear sound in .
Stereo audio is simply two channels of audio, one for the left speaker and one for the right speaker. This is the smallest setting you will need to give the listener the illusion of sound directionality and perspective.
In surround sound terms, this is a simple setup—two channels are called a 2.0 system (or, 2 channels without a subwoofer). The addition of a subwoofer changes the notation 2.1-. Where the number 1 represents the subwoofer and the attached low-frequency effects channel that it is.
More sophisticated audio systems are the 2.1 system and extra channels added to create sound around the listener. Unlike simple 2-channel systems that are usually found in hardware on the main device (such as a portable music player or TV), multi-channel surround systems typically require a separate component known as a receiver for distribution. sound signals source (Blu-ray player or cable television) to acoustics. However, there are kits not only standard 5.1 but also 7.1, as well as 9.2 and 11.2 audio channels (five speakers with one subwoofer and eleven speakers with two subwoofers,).
The vast majority of receivers now support 5.1 and 7.1 surround sound, of which Blu-Ray is plentiful, with movies now shipping with even more than 5.1 audio support.
Let's start with the acoustic setup. We'll start with a simple 2.1 setup and move on to a 7.1 setup.
How to set the sound to stereo (2.1)?
Now that we've got some terminology out of the way, let's take a look at how we can best set up the most common speaker systems, starting with a 2.1 system.
2 channel placement: With a stereo channel setting of 2.1, all movie sounds (with the exception of the low-frequency effects generated by the subwoofer) will be played on the left and right channels. All sound effects, music and dialogue from the speakers will be broadcast to you from the front speakers.
In addition to the placement of 2.1 and 2.0 speakers, which should be located on the sides of the screen and when listening to the viewer, the speakers must be turned inward towards the listener (known as convergence, as opposed to those standing in front of it), the ideal acoustic placement angle is 22-30 degrees. Position your speakers accordingly to create this cone of sound that points towards the center of your listening area (for example, the middle spot on yours).
A Note on Accuracy: It's important to note that we strive for optimal home theater sound (within reason), of course you won't get an IMAX sound system. Simply moving the speakers to the appropriate position for the viewer will drastically improve the quality of your soundstage.
How do I set up 5.1 channel audio (surround)?
5.1 channel audio is widely regarded as the absolute minimum speaker setup required to create incredible surround sound. The 5.1 speaker setup builds on the 2.1 setup layout, but adds a center channel and left and right speakers for surround.
In order to set up 5.1, the first thing to set up is the subwoofer and the left and right front channels (2 channels from the 2.1 setup above). After you have angled the left and right front channels, you need to add the center channel and rear channels.
Center channel placement: In a 2.1 setup, the left and right front speakers are responsible for delivering all music, communication, and sound effects. In the sound settings of the 5.1 receiver, you must enable - the function of additional speakers (rear).
The most important role of the central channel is dialogue. This is how actors' dialogue is usually centered on the screen, but sometimes in special effects the dialogue is mixed and goes to the left or right channel.
The center channel must be placed exactly in the center. The center channel should be as close to ear height as your setup allows and can be placed either above or below the screen. If you can't place the center channel as close to the bottom or top of the screen as you'd like, you can turn the speaker up or down a bit to direct the sound more towards your head.
Placement of Surround Left and Right, Surround Channels: Just like adding a center channel, part of the 5.1 surround back operation offloads from the original left and right channels by adding left and right surround sound channels. If you are watching a recording of a concert, for example, applause and whistling from the audience, then these rear channels create the auditory illusion that you are sitting in the front row at the concert.
In order to position the left and right surround channels for maximum impact, you need to position them approximately 90-110 degrees from your listening position, in other words, the rear speakers are positioned behind the viewer. Also, you should place them just above the viewer's head.
If you have a compromise in speaker placement due to the shape of the room and the placement of the furniture in it, it is better to place your surround speakers farther and higher than lower (this will disorientate background noise).
How do I set up 7.1 channel surround sound?
If a 5.1 channel system is the absolute minimum for surround sound, then 7.1. surround sound is by far the best for consumer home theater. While there are now more and more Blu-ray discs released for 7.1, more and more releases are coming out with 7.1. sound and most receivers are fine with surround sound channels from a 5.1 source - yet 7.1 has a more immersive sound than 5.1.
To set up a 7.1 system, place the subwoofer first, then the front left, right and center channels, and the surround sound channels. In addition to these five channels and the subwoofer, you now have two more channels: left and right - this is the rear speakers.
Left and right rear speaker placement: The 7.1 setting adds even more realism to your home theater sound by adding two more surround sound channels. These channels should be placed 135-150 degrees behind the viewer and just above their head level.
Again, if you have a compromise with rear speaker placement, then we recommend that you move them further, closer together, and/or higher. This will affect the sound quality and sound quality.
Automatic calibration: Most of us who have modern receivers have this feature. You can sit and tune each individual channel, but you can use a well-trained microphone.
Check the documentation that came with the receiver to see if the microphone supports enhanced optimization. Nowadays every company calls it differently, Yamaha calls their system YPAO or Yamaha Parametric Room Acoustic Optimizer, a small microphone is connected to the receiver, placed where the listener's head would be during normal listening, and then a series of tones and signals are sent through the speakers to check sound, echo and others. The receiver then dynamically adjusts the acoustics for these problems to produce a more balanced sound.
Although many automatic calibration systems allow you to save from 2-10 additional measurements from additional places located in the listening area, we recommend that you measure not far from the center of the listening area of the measurement area - this can lead to distorted results.
Adjust the center channel A: While many of you are big fans of using the manufacturer's automatic calibration, if you turn the volume up to "very loud" during a movie you may not hear any dialogue, it's best to adjust your center channel.
In the receiver, it's best to boost the volume to the center channel until the dialogue becomes clear, this is best done with test sound effects.
Don't use a super-cheap cable like the thin wire noodles usually supplied with the equipment, it's better to connect your speakers to a good branded one.
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I hope the article helped someone
For any questions please email me. mail: [email protected] or VK
Today I will teach you how to connect 5.1 audio systems to devices without multi-channel audio support. Anyone.
So, imagine the situation: you already have a good multi-channel audio system. We emphasize - analog, classic connectors are used as inputs RCA (tulip). At the same time, as a result of upgrading device gadgets with suitable interfaces, the system cannot be used.
How to connect such 5.1-channel speakers to devices with HDMI/Toslink digital outputs, popular USB or use a stereo output? Or how to convert multi-channel digital audio signal to multi-channel analog?
Real and "virtual" multi-channel audio
A true multi-channel audio outputs the voice to the center channel, effects and music to the rear and front speakers. Or - in accordance with the distribution during recording (in some standards of multi-channel sound).
"Virtual" multi-channel audio is distributed according to the spectral response of the reproduced sound. Software and hardware decompose the signal into components according to predetermined algorithms, and distribute sounds around the listening point, creating surround sound.
Method 1. We spare no expense for high-quality sound
The easiest way is to buy a multi-channel receiver according to your preferences and needs. The simplest, most effective. And the most omnivorous.
The purchase will give a variety of video and audio I / O interfaces, be able to independently decode files and become the center of a home entertainment system. You can always choose a model with the required number of suitable inputs - and RCA in receivers is the liveliest of all. 
Modern receivers support improved sound distribution algorithms, including Dolby Atmos, which can distribute any number of tracks to any number of speakers, taking into account the acoustic properties of the room.
The disadvantage of the solution is the cost. It starts from 10 thousand rubles for a used one and from 30 thousand for a receiver with Dolby Atmos support.
In addition, the receivers have impressive dimensions. Well, if the place and the interior allow. And if not?
Method 2. (Digital) Optical -> Multichannel Analog
For the sake of this, the article was started. I often get asked questions like: “How do I connect my home theater to a new TV? It has no analog audio outputs!”.
Mine only has a two-channel mini-jack and an optical Toslink. For a while before buying new acoustics, I connected the old 5.1 kit using such a Chinese converter. 
A rather primitive digital-to-analog converter is hidden inside the device and DSP processor- a microcircuit responsible for mixing, equalizing and effects.
The application is very simple - connect to analog RCA outputs acoustic system, on the other hand, we supply an audio signal through a coaxial or optical connector and external power from the supplied power supply. 
If the signal corresponds to the number of connected acoustic channels, it passes without mixing and processing. As it is.
That is, if the film 5.1 channel audio track, and we use the appropriate audio system - the sound quality will be the same as the original.
If a two-channel track is fed to it, then the signal is converted using a "virtual" mixing in the processor, and is distributed to all speakers.
Of course, this is very different from real 5.1-channel sound, but it still sounds nicer than regular stereo. Unless, of course, we are talking about films.
So you can connect acoustics and to other devices- for example, through the usual headphone output of a laptop, tablet or player. 
But the output will be only virtual 5.1-channel sound, even if the original track is multi-channel. Nothing else can be obtained from the stereo connector.
If necessary, the converter allows you to play any incoming audio signal in two-channel. Suitable for standard music systems systems 2.1, as well as in cases where the DSP converter does not play the track correctly.
Method 3. HDMI -> Multichannel Analog
The option using HDMI is more promising, since this interface is used much more often in modern gadgets.
To transmit a multi-channel audio track, the jack on the audio source must support the HDMI Arc protocol. Otherwise, a regular stereo signal will be broadcast, which will be converted to "virtual" 5.1 by software.
If HDMI supports this function, you can purchase such a converter. This box also supports end-to-end transmission of a composite signal: by connecting a source via HDMI, you can separately output sound to an audio system via coaxial, optical or analog connectors, while running the video sequence on a projector or TV.
Method 4. USB -> Multichannel Analog
Most of the Chinese "multi-channel USB audio cards" offered on the Internet are rather primitive tricks that produce processed stereo. Save will not work.
Another thing is external audio cards. Some of them are capable of producing multi-channel sound, and are suitable for connecting to tablets, laptops, desktop computers. 
Unfortunately, even Smart TV, not to mention most devices with proprietary firmware (receivers, media players) will not be able to recognize it as an audio device. Therefore, Creative Sound Blaster Omni Surround 5.1 , Creative X-Fi Surround 5.1 Pro or ST Lab M-330 USB is suitable only as computer accessories, or in the case of separate audio and video transmission from a computer. And this is a completely different story.
"Chinese box" or a full-fledged receiver?
In fact, the choice is ambiguous. If you need to link multiple devices in single system the choice is obvious.
