The Redmi Note 8 Pro remains one of the most popular mid-range devices, but its multimedia capabilities do not always satisfy demanding users. Often owners face a situation where maximum volume is not enough in noisy places or when watching videos without headphones, this is especially noticeable when compared with more modern flagships equipped with stereo systems.
Fortunately, the MIUI operating system on which the device is based provides extensive tools for fine-tuning audio. There are several proven ways to squeeze the maximum out of speakers without loss of quality and without risk of damage to the hardware. In this article, we will discuss all methods, from basic settings to advanced manipulation.
Before you go to any drastic measures, make sure you set the standard settings correctly. Many users overlook the built-in equalizer, which can dramatically change the perception of sound. The hardware part of the speaker in this model is quite high-quality, but software constraints often hide its real potential.
Basic audio setting in the MIUI system
The first step to improving sound should be to carefully check the standard settings of the operating system. At Xiaomi, the audio output is responsible for a set of software filters, which by default can be adjusted to the average values. You need to go to the Settings menu, then select Sound and vibration and then Sound Effects.
This is a key tool, the graphical equalizer, which is often in the default "Normal" or "Flat" position, which prevents the speaker from opening. Try switching the profile to "Rock" or "Pop", where the medium and high frequencies are twisted more strongly, which will create the illusion of higher volume and add clarity to the sound, which is critical for the speaker and the main emitter.
⚠️ Warning: When choosing aggressive equalizer profiles (such as "Rock" with maximum sliders), watch for wheezing. If the speaker starts to choke at maximum volume, slightly reduce the low-pass sliders.
Mi Sound Enhancer is also available on this menu, a proprietary technology that adapts the sound to the type of headphones you use, but also affects the main speaker. Activate this option and select the "Mi In-Ear Headphones" or "General" headphone type for the system to apply the improvement algorithms. Be sure to check if the "Adaptive Sound" option is enabled, if it is available in your firmware version.
You can use an extended equalizer to get a deeper setup, and by moving the frequency sliders manually, you can create your own profile, for example, lifting frequencies in the 2kHz to 4kHz range will add vocal clarity, and climbing above 10kHz will add air and detail.
Using the Engineering Menu to Enhance the Dynamics
One of the most effective, but careful methods is to access the engineering menu, which is a hidden part of the system that's designed for testing equipment by the plant's engineers, where you can directly control the amplification level of the signal fed to the audio codec. To enter the menu, open the Phone app and type the combination ##3646633##.
After you log in to the Engineering Mode interface, you need to go to the Hardware Testing tab, then select Audio and Audio Debug Tool. From the list that opens, find the Type option and select Media (this is responsible for multimedia: music, video, games). Next, in the Level list, select the maximum value available, usually Level 15.
At the bottom of the screen, you'll see a slider or numerical field that's responsible for (Gain), which increases the volume directly, but there's a major risk: over-boosting the speaker can overload the speaker and physically rupture the membrane.
Risks of changing engineering settings
Once you've set up, press the Set button to apply the changes. Check the result by turning on any track. If the sound is cleaner and louder without distortion, you're on the right track. If you have strong wheezing even at medium volume, immediately return the values back.
Third-party amplifiers
If there are not enough system tools, then the Google Play Store applications come to the rescue, and they act as intermediaries, amplifying the audio stream before it is sent to the speaker. One of the most popular and effective solutions is the Volume Booster GOODEV app, which is simple, lightweight and requires no root rights.
The principle of such programs is to programmatically increase the amplitude of the sound wave. In the application interface you will find a gain slider. It is recommended not to raise it above 20-30%, since further increase leads to digital distortion (clipping), which sounds like a crackle and can damage the speaker.
- 📈 Volume Booster Plus – allows you to customize the amplification separately for music, video and alarm clock.
- 🎚️ Super Volume Booster – has a built-in equalizer and profile saving function.
- 🔊 Bass Booster & Equalizer – Focuses on improving low frequencies, which adds volume to sound.
It is important to understand that third-party programs put additional strain on the processor and can discharge the battery faster, and they can conflict with the system equalizer Xiaomi, so before installing them, it is better to reset the sound settings to the factory.
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Use booster applications only when absolutely necessary. Constant operation at limit values reduces the life of the dynamic head.
Cleaning and maintenance of speakers
Often the problem with quiet sound is not software, but physical pollution. The main speaker grid in the Redmi Note 8 Pro is located at the bottom of the case and constantly collects dust, pile from pockets and fine dirt. Clogged holes prevent the free output of the sound wave, reducing the volume by 20-30%.
To clean, use a soft toothbrush or a dry antistatic brush. Walk gently across the net, sweeping the dust out. You can use Scotch: glue sticky tape to the net and pull back sharply to pull out the stuck particles. Using compressed air is also effective, but blow in short series so as not to damage the membrane with excessive pressure.
⚠️ Warning: Never use needles or sharp metal objects to pick through the speaker grid.You can pierce the protective membrane or damage the speaker itself, resulting in a permanent crack.
Also check the speaker at the top of the screen, which is often covered with skin fat from the ear during a conversation, wipe it with a cotton swab slightly soaked in isopropyl alcohol (after turning off the phone).
Setting up Bluetooth and wired headphones
If the quiet sound is only seen when you connect external acoustics or headphones, the problem may be Bluetooth codecs or matching (impedance). In Bluetooth settings (Settings → Bluetooth → Additional), try changing the codec from AAC to SBC or aptX if your playback device supports various options. Sometimes automatic codec selection is not optimal.
For wired headphones through a 3.5mm connector (or Type-C adapter), the quality of the DAC (digital-to-analog converter) is important. Built-in DAC in the Redmi Note 8 Pro decent, but external USB-Sound card can give you a boost in volume and quality. In the audio settings, check if the "Mi Sound Enhancer" option is activated specifically for the connected device.
Remember that some wireless headphones have their own manufacturer app where you can adjust the equalizer and sound modes, and check if it's power saving mode, which can limit volume.
Comparison of sound amplification methods
To make it easier for you to choose the right method, we have systematized the main methods for their effectiveness and safety, each method has its advantages and disadvantages, which are worth considering before using.
| Method | Efficiency | Security | Difficulty |
|---|---|---|---|
| Equalizer setting | Medium | Tall. | Low. |
| Booster applications | Tall. | Medium | Low. |
| Engineering menu | Maximum | Low. | Tall. |
| Cleaning the speakers | Depends on pollution | Tall. | Medium |
As you can see from the table, the safest way is to programmatically set up, while the engineering menu gives the greatest boost but requires knowledge. Combining cleaning the speakers and setting the equalizer gives the optimal result without risk to the device.
Checklist to fix sound problems
Before you bring your phone to service or use sophisticated methods, take this short diagnostic path to help eliminate simple errors and software failures.
☑️ Diagnostics of sound
If after completing all the checklist items, the sound remained quiet or wheezing at low volume appeared, it may be a hardware problem, it may be a departing plume of the speaker or its physical wear, in which case it will require disassembling the device and replacing the component.
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If the sound disappeared abruptly after falling or getting moisture - software methods will not help, repair is required.