In this article we will examine in detail the equipment for converting audio signals, which is provided on our website. At the time of writing this article, we have four current models.
As you can see, the equipment is divided into two types - decoder and converter. Both types are designed to convert audio signals and audio connectors. They differ in purpose.
Decoders are designed to connect speaker systems with speakers and subwoofer. The equipment also decodes audio formats in 2.1/5.1 mode.
The converter converts the signal from digital to analog and vice versa. The analog connector is provided as 2RCA only. The purpose of such a converter is the usual conversion of a connector.
Designed to convert analog sound signal in digital. Accordingly, the R/L connector is converted to Coaxial or Toslink, and at the same time! At the output you will receive a digital signal of 2-channel uncompressed LPCM (linear pulse code modulation) with a sampling frequency of 48 kHz.
One of the advantages of the converter is its small size and ease of connection.
Now in “everyday language” - how to apply it.
Such a converter is simply necessary if you do not have digital audio outputs on your TV, but only an analog “tulip”. For example, you purchased a digital sound bar that only has Toslink or Coaxial. Your TV doesn't have a digital audio jack. Using this converter, you connect 2RCA from the TV to the tulip connector
Is it optical or coaxial cable connect to the appropriate digital connector.
Charger from converter to mains, and that's it! The signal has gone!!
Bottom line - you will not only be able to connect your TV to your new music equipment, but you will also receive an excellent digital signal at the outputs!
Designed to convert a digital audio signal to analog.
The digital signal can come from two sources. For this, the converter has two digital inputs, Toslink and Coaxial.
At the output, the signal is converted to analog and output to RCA connectors (L/R).
Let's figure out how it works.
The equipment is necessary when you have a digital signal source from which you want to extract audio (DVD, TV and even laptop). Your sound will go to an audio system that only has RCA connectors. By connecting an optical or coaxial cable to the converter, then connecting the white-red “tulip” cable, you will receive sound on your audio system. It turns out if you have good audio system, but it doesn’t have the digital output that your player has, you don’t have to buy it new system. You can simply convert the sound and connect everything without any problems.
Converts digital audio signal to analog. The main difference from the converter is the ability to convert in 2.1/5.1 format, and sound distribution in the speaker system format.
And now it’s clear: for example, you bought new TV, which has an optical audio connector only. And you have a 5.1 speaker system, it’s good, but it’s old, it doesn’t have numbers. Buying a new music system is not always possible. And then you can convert the sound and the connector, and “connect” these two equipment using this decoder.
Now for more details about the device.
The decoder has the following input connectors - two optical inputs (you can connect two signal sources at once), a coaxial input, and an analog stereo input. Also on the front panel there is a power connector (power supply included), a button for switching signal sources, and three indicators of the working source and a power indicator. 2.1/5.1 sound mode switch button
At the output, the device has six analog audio outputs in the form of “tulips”. FL/FR - front left/right, SL/SR - rear left/right, CEN - center, SW - subwoofer (woofer).
How to connect - everything is simple, the source is in the digital input connector, we throw a tulip cable to the music system into the corresponding connectors. And that's basically all...
Since the decoder can work in several sound formats, we select the mode we need using the 2.1/5.1 button
Sound conversion modes:
1. digital 5.1 to analog 5.1, when you press the 2.1/5.1 button, it forcibly converts the sound to 2.1 stereo.
2. The 2.1 signal is converted to “pseudo 5.1”; when you press the 2.1/5.1 button, the signal returns to 2.1.
Switching sound formats occurs smoothly, the sound slowly fades, then increases again.
By the way charger, the kit includes an optical cable 1 meter long.
Absolutely the same device as the previous decoder. The only difference is in the audio output connectors. The inputs have the same connectors. The operating principle, including audio decoding modes, is the same.
Front Panel
Back panel
In addition to analog audio connectors, this decoder has USB input, which can act as a charger connector.
In this article, we told you in detail about the audio converter models we have. If you still find it difficult to choose the equipment you need, our consultants will be happy to help you by phone 8-499-343-01-71 or answer all your questions by email
The question arose: there is a new TV with HDMI inputs or digital audio output and there are 5.1 acoustics but designed only to receive low-frequency audio signals but also in 5.1 format, how to connect these two devices to each other.
It won’t work out easily with the help of laces, since from one device we have access to digital format, and in the other there is an analog input designed to receive an audible spectrum, that is, a low-frequency signal.
To operate these devices in one connection, you need to use a conversion device (AV decoder) between them. In a computer, the function of a sound decoder is performed by a sound card, and 5.1 acoustics with low-frequency inputs were primarily developed for them.
Connectors for connecting 5.1 acoustics
On sound card There are three connectors for sound output, similar to connectors for example for connecting headphones. There are also three such connectors on the acoustics. Why three, one connector allows you to transmit two audio channels, so
- two front audio channels
- two rear
- center and subwoofer
Also, the acoustics may have tulip-type connectors, but then there will be 6 of them.
In the photo below you can see similar inputs on acoustics.
Speaker input 5.1
So we have acoustics, so we won’t consider the use of AV receivers, but briefly we can say that this is a device to which a digital audio signal is supplied, it is converted into a low-frequency signal, amplified (as part of an amplifier) and connected to the receiver sound speakers. We just need a converter since we already have an amplifier in the acoustics.
For conversion, you can use an audio decoder, but famous companies do not produce such equipment; they produce media players that have more advanced functions.
5.1 decoders are produced by Chinese companies; the cost of such a device is about $55. It allows digital sound to be fed to it via an optical or electrical interface, converted into a low-frequency audible spectrum, and then transmitted to active acoustics. Many devices can be bought in China with delivery by mail, for example, using this link http://ru.aliexpress.com/w/wholesale-digital-decoder-5.1.html
As a result, you can assemble the following connection diagram TV→5.1 decoder→acoustics. There are also advantages to using a decoder; many TVs do not support playback audio tracks DTS format, but this format Lately is gaining more and more popularity and it is by no means rare cases when, if you want to watch a film, High Quality via network or from removable media It turns out that there is an image, but unfortunately there is no sound. Many decoders support the format
Good day!
I decided to buy an Audio Rush (Audio gear) to replace my audio decoder, which . About all the differences and advantages of the new decoder below the cut.
In short, very worthy device. This is one of the best and high-quality acquisitions recently from our Chinese comrades.
Purpose - decoding digital audio to analog 5.1 for home cinema.
I bought it on ebay for $50, the parcel was sent by Swiss post and arrived very quickly - for .
The parcel arrived as usual in a plastic envelope, and the box was wrapped in bubble wrap
Package
The box is standard for all devices 
The box contains a decoder, remote control (with battery!), power adapter with European plug, instructions in Chinese and English. Unfortunately, the manufacturer did not include an optical cable.
Equipment
A little closer
Ventilation holes on the side 
The case is of very high quality, of sufficient thickness, heavy and cold.
Front connectors and indicators:
Optical input (SPDIF), USB connector, Infrared sensor, USB operating mode, Optical input operating mode, Coaxial input operating mode, Mode selection button, On/off button.
Rear connectors: 
Video output, 5.1 audio output (6 RCA), Coaxial digital input, Power.
Power adapter, characteristics
The remote control is strictly incompatible with my Microlab M-1910 speakers, they go crazy (the codes partially coincide), starting with changing the volume and ending with entering the service mode.
Everything inside is of very high quality, although the board is not washed off after manual soldering of large parts.
Main chips
Silan - SC8636A
Didn't find any details
atmel 24c02bn
The AT24C02B provides 2048 bits of serial electrically erasable and programmable
read-only memory (EEPROM) organized as 256 words of 8 bits each. The device is
optimized for use in many industrial and commercial applications where low-power
and low-voltage operation are essential. The AT24C02B is available in space-saving
8-lead PDIP, 8-lead JEDEC SOIC, 8-lead Ultra Thin Mini-MAP (MLP 2x3), 5-lead
SOT23, 8-lead TSSOP, and 8-ball dBGA2 packages and is accessed via a Two-wire
serial interface. In addition, the AT24C02B is available in 1.8V (1.8V to 5.5V) version.
74HCU04D
hex inverter
m12l64164a
The M12L64164A is 67,108,864 bits synchronous high data rate Dynamic RAM organized as 4 x 1,048,576 words by
16 bits. Synchronous design allows precise cycle controls with the use of system clock I/O transactions are possible on
every clock cycle. Range of operating frequencies, programmable burst length and programmable latencies allow the same
device to be useful for a variety of high bandwidth, high performance memory system applications.
winbond 25q16cvsig
Memory Size 64M (8M x 8)
Speed 80MHz
Interface SPI Serial
Main characteristics
Digital audio decode format…………………………………………………………….Dolby Digital (AC3)/DTS/LPCM
USB playback music format……………………………………………………MP3 / WMA / AAC / WAV
USB playback video format…………… Divx3.11,4.x,5.x/Xvid/AVI/MJPEG/VOB/VCD(Dat)/MPG1,2,4
USB playback photo format……………………………. JPG (Resolution range: 16x16～10000x10000)
DSP sample frequency range………………………………………………………………………………32～96 KHz
DSP Bit rate range……………………………………………………………………………….16～24 Bit
Digital input level……………………………………………………………………………….0.1~1Volts p-p
Analog output level(1kHz@0dB).............................................. .....................................1V RMS
SNR @ 0dB(CCIR/ARM)………………………………………………………………………………≥85dB
Distortion………………………………………………………………………………………..≤0.1%
Frequency response……………………………………………………………………………………….20Hz~20KHz
Max working current……………………………………………………….……….…….….…..400mA
Power adapter format Input ……......….….…….…….…….…. AC 100V～240V 50HZ/60Hz, DC5V/1A
Operating Temperature range……..…………….…………………………………………. -10 to +55℃
Storage Temperature range……………………………………………………………………. -20 to +60℃
Operating Humidity range………………………….….……….……….10 to 90%RH (No Condensation)
Storage Humidity range………………………….….……….……………5 to 95%RH (No Condensation)
Case Dimension (L x W x H) ………………………………….…………………………… 139x64x22 (mm)
Weight…….………………………….………………………………………….………………………. 210g
Finally, what is this box for:
1) The main purpose is to decode a Dolby Digital digital signal into 5.1 analog sound for connecting home theater speakers.
2) Optionally can play MP3 and Video formats, TXT
So, more about these two modes
1) My decoder is connected to an LG TV and the digital audio output is set to AUTO (optical cable from another Audio Rush decoder), in this mode there is no need for a remote control, everything works right away.
The sound is clear, without distortion, all audio formats that can be transmitted over an optical channel are reproduced. The decoder clearly separates the channels! There is an equalizer with presets that can be turned on from the remote control and switched in a circle (I don’t use it).
The operating mode after the power is turned off is remembered.
2) Video player mode. In this mode (switching through the front panel or remote control), a simple graphical menu becomes available. Support for video formats is quite scarce and is generally limited to Mpg4 and MPEG2; audio is played in MP3 format and without support for Russian characters; If there are audio files on the flash drive, they start playing automatically. Graphic files can be shown in slide mode. In the settings you can test whether the speakers are turned on correctly. It looks like there is an opportunity to update the firmware (although I couldn’t get anything from the Chinese)
Player mode
Video playback, timer does not clear 
View photos 
Main menu 
mp3 list 
List of videos 
Settings 
Firmware 
Comparison with another popular Audio Rush decoder:
Firstly, this is the sound quality - in Audio Rush the sound often “floats” - the channels are slightly mixed and can move from channel to channel. When the digital audio channel suddenly turned off (for example, like for me, when the PS3 froze), a terrible high-frequency squeak appeared in all channels for 15 seconds, this is not the case in the ADSW0007M1. Periodically, on the old decoder, the sound would stupidly disappear for a second or two. Over time, on the old decoder, the sound volume automatically decreased; it was necessary to distort the power supply to restore the sound level. Audio Rush got warm - not fatally, but still, the new one is a little warm. Audio Rush was unable to save one of three sources after a power outage. In the ADSW0007M1, not only does the operating mode and the selected input (one of two) remain, but when the power is turned on, the sound level gradually increases. The only thing in which the reviewed decoder is inferior (this is both an advantage and a disadvantage) is that there is no stereo decomposition in pseudo 5.1, it would be completely 5+ if you could turn on the decomposition in the settings or from the remote control.
And of course - blinding powerful blue LEDs, or rather the lack thereof!
For a long time I was looking for a simple Dolby Digital and DTS to multi-channel analog 5.1 audio decoder for the HD player WD HD TV.
Buying an AV receiver would undoubtedly be a more correct and beautiful option, but I was too lazy to tinker with its settings, look for space for a box weighing 10 kg and, most importantly, spend extra money.
On ebay I came across a Chinese online store (unverified, by the way), where I took a chance and bought for only 72 bucks a small and compact box that fully performs its functions:
Characteristics:
Converting Dolby Digital DTS digital signal to analogue multi-channel 5.1
Convert analog stereo to 5.1 multichannel
Three independent digital inputs: two optical SPDIF and one coaxial, as well as one analog stereo AUX
Channel select button
Analog outputs: front - 2, rear - 2, center and subwoofer
Automatic detection Signal format: Dolby Digital EX / DTS-ES / Dolby Pro Logic II/DTS/AC3
Signal-to-noise ratio: 120 dB
dimensions: 105x75x25 mm
Housing material: aluminum
View from the digital inputs:
View from the analog outputs:
Briefly about the positive and negative sides of the piece of iron.
"Pros":
+ really high-quality sound distribution across channels. Compare with built-in Chinese DVD player decoder on the same acoustics SVEN IHOO-Ir;
+ 3 digital inputs to which you can connect all equipment - in my case these are DVD and HD players;
+ no setup at all – plugged it into the network, selected a channel and that’s it;
+ “remembers” the selected channel even after disconnecting from the network;
+ price. I haven't seen anything cheaper anywhere.
There are also “disadvantages”, but IMHO they are insignificant:
- I wanted to at least shoot and hang the designer of the case who arranged the connectors in this way, because When all the wires were connected, it became inconvenient to use the decoder. I'll explain now. I don’t quite understand the design idea regarding WHERE the decoder should be located in relation to the rest of the equipment: if in plain sight, you can use the input channel selection button, but the sight of a bunch of wires is not aesthetically pleasing; if you put the decoder out of sight, then how to select the channel ? For myself, I solved this problem by slightly modifying the subwoofer and the decoder itself, but more on that later.
- the button selects channels in a circle, but there are channel selection LEDs only for three digital channels, the analog one remains unlit.
- LEDs are blue and VERY bright (can be used to damage the vision of a potential enemy)
- signals from all other channels are mixed into the sub channel.
All the “cons” were overcome in the following way: the decoder was glued to the back of the subwoofer with tape (I have it active with an amplifier). I removed all the LEDs from the decoder and transferred them to the front control panel of the sub. The channel selection button also went there. For ease of connection/disconnection, a Soviet 10-pin connector was embedded into the rear wall of the subwoofer.
P.S. At the time I bought it (November 2009) this was the only model. And now its analog outputs from 3.5 mm have been replaced with RCA “tulips”. Recently a more expensive model appeared (for 100 bucks), in which all the “cons” were taken into account and a remote control was added: http://www.lunashops.com/goods.php?id=294
Thanks to everyone who read to the end!
This decoder can operate in three modes (switchable on the front panel). That is, it also serves as a switch, since you can connect up to three audio playback devices to it at the same time and switch between them.Incoming HDMI port, it receives video and audio.
Dolby digital (AC3), DTS, LPCM audio is supported.
Mute mode - passes video and audio to HDMI output. To which a TV or receiver can be connected that has its own EDID and supports up to LPCM 7.1 channels
2CH mode - the internal EDID of the decoder is used, 2.0 stereo sound can be output to any port (optical SPDIF, analog RCA FL and FR or analog mini jack 3.5mm)
5.1CH mode - the internal EDID of the decoder is used, 5.1 sound is output to optical output, or to analog RCA 5.1
Power adapter included.
Support 3D, CEC, HDCP
DAC 24 bit/192 kHz
HDMI resolution………………….....up to 1080P/1080I/720P/576P/480P/60Hz
Supported video color format………………….24 bit, 30 bit, 36 bit
Digital audio conversion format …………………………………. PCM, up to 5.1
DAC sampling frequency……………………………………………………………….. 32～192 kHz
DAC baud rate range……………………………………………………….16～24bit
RCA analog output level.................................................... ........................1V RMS
SNR (1 kHz at 0 dB)……………………………………………………………………….…≥85 dB
THD+N (1 kHz at 0 dB)……………………………………………………………………………………….....≤0.1%
Frequency response……………………………………………………………….20 Hz~20 kHz
Input HDMI cable length………………≤15m standard AWG26 cable
Output HDMI cable length……………≤15m standard AWG26 cable
Max. operating current…………………………………………………………….……….…….….…..500 mA
Power unit ……......……….…. 100～240V alternating current, 50/60 Hz, 5V/1A DC
Operating temperature range …………….……………………………………………. from -10 to +55℃
Storage temperature range………………………………………………………. from -20 to +60℃
Operating humidity range………………….…….………. from 10 to 90% RH (no condensation)
Storage humidity range……….….……….……………5 to 95% RH (non-condensing)
Housing dimensions (L x W x H) ……………………….…………………………. 139x64x22 (mm)
Weight …….…………………………….………………………………………….……………………. 220 g
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