Modern TVs, including the popular Samsung 7 Series, are equipped with thin enough cases that physically limit the size of the built-in speakers. In the pursuit of design, manufacturers often sacrifice the quality of the soundtrack, making it flat and devoid of deep bass. It is at this point that external acoustic systems, such as soundbars from Xiaomi, come onto the scene, capable of radically changing the perception of a film or game.
The process of integrating Chinese acoustics into the Korean TV ecosystem can seem complicated due to differences in interfaces and software. However, engineers have provided several standard audio streaming protocols that allow devices from different brands to be combined without loss of quality. The key is choosing the right connection interface, because it depends not only on the volume, but also on the ability to control the sound of the TV remote.
In this guide, we will take a look at all the switching options available, from the best digital connection to wireless methods, how to activate the HDMI-CEC protocol to control one remote, how to configure the optical output, and the nuances of Bluetooth pairing.
Choosing the optimal connection interface
Before you start physical manipulation, you need to determine which type of connection will be most effective for your particular Xiaomi Soundbar model and Samsung TV. Modern devices offer several options, each with its own advantages and limitations in audio bandwidth. Choosing the right cable or data transfer method is the first step to quality sound.
The most preferred option for medium-to-high-end home theaters is the HDMI ARC interface or its newer version, eARC. This digital channel allows high-resolution multichannel audio, including the Dolby Digital and DTS formats that are often used in streaming services and on Blu-ray discs. In addition, the same cable transmits a control signal, which eliminates the need to use two remotes.
If your TV or soundbar doesn't support HDMI ARC, or if the free ports are busy with other tech, you should pay attention to the optical output of Toslink. It's a fully digital interface that is also capable of transmitting compressed multichannel audio, but does not support the most advanced object audio formats, such as Dolby Atmos in full. However, for most users, the difference will be invisible, and the connection stability is higher than that of wireless methods.
- 🔌 HDMI ARC/eARC: Best sound quality, remote control transfer, support for all modern formats.
- 🔴 Optical (Toslink): Stable digital signal, no electromagnetic tips, but no support for the latest codecs.
- 📶 Bluetooth: Complete absence of wires, but possible latency and loss of quality when compressed.
- 🎧 AUX (3.5 mm: Analog signal of the lowest quality, suitable only as a backup option.
When choosing a cable, it is important to consider its specification. For HDMI, it is recommended to use cables 2.0 and higher with Ethernet support to ensure stable data transfer. Cheap wires may not provide the necessary contact, which will lead to periodic loss of sound or interference in the form of “cod”.
Connect via HDMI ARC and configure Anynet+
The HDMI ARC (Audio Return Channel) interface is the gold standard for connecting external acoustics to a TV. The Samsung 7 Series usually has at least one ARC or eARC-labeled port that you need to use, a technique that not only transmits sound to the soundbar, but also returns the control signal back to the Anynet+ (HDMI-CEC) function.
To start the connection, take a quality HDMI cable and connect the HDMI OUT (ARC) port on the back of the Xiaomi soundbar to the corresponding HDMI IN (ARC) port on a Samsung TV. It is important not to confuse the ports, since normal HDMI inputs will not be able to transmit audio from the TV to the soundbar in the opposite direction. After a physical connection, turn both devices on the network.
The next step is to activate the control function in the TV menu, so you have to go to the settings and find the partition that handles external devices, and without this option, the TV remote will not control the soundbar volume, and you will have to reach for the acoustics remote every time.
You can set it up via the following menu: press the Home button on the remote, go to Settings → Connection → Expert setting. Here you need to find Anynet+ (HDMI-CEC) and move the switch to the On position. The TV will start looking for connected compatible devices and must automatically determine the soundbar.
☑️ Checking the settings HDMI ARC
If the automatic determination has not occurred, check the audio settings. Go to Settings → Sound → Output and select HDMI Receiver or Audio System. In some firmware, you may need to manually select the digital audio format by setting the Pass Through or Auto value so that the TV does not attempt to decode the sound on its own.
⚠️ Note: If, after connecting through HDMI The image on the screen has become dull or color is gone, perhaps using a low-quality cable that does not support video and sound transmission at the same time at high frequencies.
Use of optical cable Toslink
The S/PDIF optical interface (Toslink) remains one of the most reliable ways to transmit digital audio, especially in situations where HDMI ports are occupied by a game console or media player, the main advantage of this method is full electroplating, which eliminates the background and electrical tips that sometimes occur when using analog or cheap digital cables.
To connect, you'll need an optical cable with square connectors. On the back of the Xiaomi soundbar, find a port signed as OPTICAL or Digital In, and on the Samsung 7 Series TV, a Digital Audio Out (Optical) port. Before inserting the cable, make sure that the protective plugs from the ends of the fiber are removed, as they block the light signal.
Once connected, the cable needs to switch the source of the signal on the soundbar, usually by using the Source button on the acoustics panel or on the device body until the display lights up with the D.OPT or OPTICAL indication. The TV may not switch automatically, so the audio settings need to be changed manually.
From the TV menu, go to Settings → Sound → Additional settings → Digital Output Format. Here, you can select Pass Through mode, which allows the soundbar to decode the audio tracks itself, which is especially important for Dolby Digital formats, providing surround sound that cannot be obtained when converted to stereo.
| Parameter | HDMI ARC | Optical (Toslink) | Bluetooth |
|---|---|---|---|
| Sound quality | Maximum (Lossless) | High (Compressed) | Medium (Strongly compressed) |
| Control of the TV remote | Yes (automatically) | Adjustment required | Partially. |
| Support for Dolby Atmos | Yes (via eARC) | No. | No. |
| Sound delay | Minimum | Minimum | Possible. |
Why is optical cable better than Bluetooth for movies?
Wireless connection via Bluetooth
Wireless is ideal for listening to music from a smartphone or when physical cable connection is not possible, but for watching movies, this method may be less preferable due to the potential delay of audio flow (latency), although modern codecs aptX and AAC have significantly minimized this problem.
To connect the Xiaomi soundbar to a Samsung 7 Series TV over Bluetooth, first put the speaker system into pairing mode. Usually, you need to press and hold the Bluetooth button on the remote or soundbar body until the indicator starts flashing quickly. Some Xiaomi models require a brief press of the power button to activate the search mode.
On your TV, go to Settings → General → External Device Menu → Bluetooth Connection Menu → Bluetooth Dean List. Click Scan or Update. In the list that appears, find your device (usually called Xiaomi Soundbar or a device model, such as MDZ-XX-XXX) and select it.
After successful pairing, the TV can request confirmation. Click "Confirm" or "Yes" on the screen. The sound should switch automatically. If this does not happen, select Bluetooth Audio from the Sound menu → Output. To improve sound quality in the same settings, you can try changing the output format to PCM if distortions are observed.
- 📶 Make sure the soundbar is no longer a distance away. 3-5 Meters from the TV for a stable signal.
- 🔋 Watch for the soundbar charge if it is battery-powered, as a discharged battery can degrade transmitter power.
- 📺 When watching movies, check for lip and sound sync; when delayed, it is better to use a cable.
⚠️ Attention: When connected via Bluetooth, the volume control function from the TV remote may not work correctly or with a delay.
Set up sound and equalizer parameters
After a successful physical connection, it is important to properly configure the software part to match your preferences and room characteristics. Samsung TVs and Xiaomi soundbars have their own sound processing algorithms that can conflict or, conversely, complement each other.
First of all, it is recommended to turn off the TV's built-in speakers if they do not turn off automatically. Go to Settings → Sound → Speaker settings and make sure that the Audio System or External Speakers are selected. This will prevent echoes and phase distortions that occur when two sound sources are working simultaneously.
Next, you have to adjust the sound mode. For movies, the best mode is Standard or Movie, which expands the dynamic range and makes the dialogues clearer. For music, choose Music mode, which aligns the frequencies. On Xiaomi soundbars, there is often a separate smartphone app through which you can adjust the equalizer in more detail.
If you use an HDMI ARC, turn on the Auto Power Link feature (if available in your Xiaomi model).This will allow the soundbar to automatically turn on and off along with the TV. Also check the Bass Boost or Subwoofer settings to add depth to low-frequency effects without overloading the average frequencies.
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For nighttime movie viewing, turn on Night Mode in the sound settings. It compresses dynamic range, making quiet sounds louder and sharp explosions quieter so as not to disturb your neighbors.
Solutions and diagnosis
Even if you're properly set up, you can have technical difficulties. One of the most common problems is the lack of sound or the interruption of the sound, first of all, check the integrity of the cable and the density of the connectors, and often the problem is the trivial oxidation of the contacts or the incomplete plug.
If there's a sound but it's wheezing or distorted, try changing the digital audio format in the TV settings from Auto to PCM or Dolby Digital. Sometimes the TV tries to send a format that the soundbar doesn't support in its current mode. Resetting the audio settings to factory values also often helps to fix software glitches.
In case the soundbar is not detected by the TV on HDMI, try the following sequence of actions: turn off both devices from the socket (not just remote, but physically turn off the power cord), wait 30 seconds, turn on the soundbar first, then the TV. This procedure resets the HDCP protocol and often solves the problem of “invisibility” of the device.
If the problem persists, check for firmware updates. Go to Support → Software Update on Samsung TV. For Xiaomi soundbar, updates are often released via the Mi Home or Xiaomi Home mobile app, which you need to install on your smartphone.