Owners of modern Smart TV Xiaomi and Redmi often face a paradoxical situation: 4K-And the picture is accompanied by a mediocre, flat sound of the built-in speakers, and it's not a marriage, but a saving on components to reduce the final cost of the device. TV PatchWall allows you to significantly adjust the audio stream, making watching movies and listening to music much more pleasant.
Before you buy expensive acoustics, it’s worth experimenting with software settings. Xiaomi’s digital signal processing has hidden potential that isn’t fully disclosed by default. Proper frequency calibration and choosing the right audio stream can do wonders even with small 10-20W speakers.
In this article, we’ll look at all the sound enhancement techniques available, from hidden engineering menus to the right external devices, and learn how to make your TV sound volumetric, clean and loud using only built-in tools or minimal attachments.
Basic calibration of the built-in equalizer
The first step to sound quality is to drop standard presets like Standard or News, which often artificially ups the high frequencies to make voices creaky, or to jam bass to deplete soundtracks, so you have to go to Settings → Sound → Mode and choose User or Manual.
In manual mode, you can access the graphical equalizer. It's important to understand the physics of sound: low frequencies (60-250 Hz) are responsible for volume and humility, medium frequencies (500 Hz - 2 kHz) are responsible for speech intelligibility, and high (4 kHz and above) are for detail and "air." Most of Xiaomi's built-in speakers are characterized by a failure in the area of medium frequencies, which forces users to constantly turn up volume.
The optimal setting for watching movies at night or for regular television looks like a gentle curve. Try to slightly lift the sliders in the 100-300 Hz range for warmth and add 1-2 dB at frequencies above 8 kHz for clarity. The main thing is not to overdo it, otherwise there will be distortions known as clipping.
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When setting up your equalizer, use a test track you know well.Abrupt changes can initially be perceived as deterioration, give your ears 10-15 minutes to adjust to the new frequency balance.
⚠️ Warning: Avoid sudden frequency spikes if you lift one equalizer band more than a few times. +6 dB, the built-in amplifier may not cope with the load, which will lead to wheezing and rattling of the body.
Developer menu secrets and hidden codecs
The Android TV operating system on which Xiaomi TVs are based allows you to activate support for advanced audio codecs, which are often disabled by default for compatibility with older receivers.We are talking about the Dolby Digital Plus, DTS and PCM formats. Switching the audio output mode can make a difference, especially if you use an external sound bar or home theater.
To access these settings, you sometimes need to activate the developer mode. Go to Settings → About device → Build and click on this item 7 times in a row. After the message “You became a developer”, a new section will appear in the settings menu. Find the item associated with audio formats or HDMI pass-through.
What is HDMI ARC/eARC?
In the audio settings section, look for the option “Digital Output” or “Digital Format.” If you have a good audio system connected, select “Auto” or “Pass-through” to allow the TV to transmit raw signals without its own processing. If the sound is only coming through TV speakers, make sure that you choose “PCM” as this is the most versatile format for internal processing by the processor.
| Codec | Quality. | Compatibility | Recommendation |
|---|---|---|---|
| PCM | High (no compression) | Universal. | For built-in speakers |
| Dolby Digital | Medium (compression) | Tall. | For old receivers. |
| Dolby Digital Plus | High. | Medium (HDMI 2.0+ required) | For streaming (Netflix) |
| DTS | High. | Low (license fee) | For Blu-ray discs |
Use of third-party applications for correction
Xiaomi's regular functionality doesn't always allow you to fine-tune the sound to specific content. Google Play Store apps come to the rescue, which work at the system level, intercepting and processing the audio stream before sending it to speakers. One of the most powerful tools is the Equalizer FX or Bass Booster app.
These programs offer not just frequency sliders, but also presets for different genres of music and content types. For example, Cinema artificially expands the stereobase, creating the illusion of surround sound on even two speakers. Voice mode cuts out high frequencies, leaving only the middle, which is ideal for news channels.
On low-cost models with a small amount of RAM, this can lead to micro-latency of the interface. If after installing the application, the menu began to slow down, it is better to remove it and return to the standard settings.
Connecting external acoustics: soundbars and 5.1 systems
If the software methods are exhausted and the sound quality is still not satisfied, the only right solution is to buy external acoustics. Xiaomi's built-in speakers are physically limited by body size and power (usually 2x10 watts). They are not able to create the air pressure required for deep bass. Connecting a soundbar or a Home Theater system solves this problem radically.
The best way to connect is through an HDMI (ARC) connector, which allows you to control the soundbar volume with the TV remote and automatically turn on the external system when you start the TV. If you don't have one, use the optical output of S/PDIF (Optical). It provides lossless digital signal transmission, but does not support volume control from the TV remote (you need a remote from the soundbar).
☑️ Choosing external acoustics
When using Bluetooth speakers or headphones, you should consider latency. Cheap Bluetooth adapters can desynchronize lips and voice in 200-300 ms. For Xiaomi TVs, there are special low-latency adapters that connect to USB that minimize this problem, but a wired connection via AUX or fiber will always be more reliable.
⚠️ Warning: When you connect an expensive audio system through a cheap optical cable (Toslink) longer than 3 meters, the signal can degrade.Use high-quality cables with gilded contacts for stable multichannel audio transmission.
Resolving technical problems and wheezing
Sometimes the problem isn't with settings, but with hardware defects or software failures. If you hear cracking, static noise or periodic interruptions, check the physical condition of the speakers. In Xiaomi's slim cases, the speakers diffusers can touch the back wall or mount elements at maximum volume, causing rattling.
Another common cause is overheating of the sound chip or problems with the power supply, which manifests itself when working at high volume for long periods, in such cases, it helps to reset the settings to factory or, in extreme cases, flashing the device, and it is also worth checking whether the Volume Limiter feature is included in the security settings, which is often activated by default to protect children's hearing.
If wheezing only appears in certain apps (like only YouTube, but not the built-in movie theater), the problem may be the app's cache or its incompatibility with the current version of Android TV.
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The rattling of the case at high volume is a design feature of budget TVs: the solution is to reduce the bass in the equalizer or to glue a damper material (vibroplast) on the inside of the back cover.