Owners of Xiaomi Redmi Note 8 smartphones often face a situation when in a noisy place or with a bad signal of the network of the interlocutor becomes difficult to hear, this is a common problem that can be caused both by the software limitations of regional versions of the firmware and banal contamination of the speaker grid. The speaker in this model is located at the top of the bezel, and its performance directly affects the comfort of communication.
There are many ways to get the most out of your device’s acoustic system, and we’ll look at methods ranging from simple physical cleaning to the hidden engineering menus available in the MIUI shell. It’s important to understand that not all methods are equally safe, so software modifications to your audio settings should be approached with caution.
Before you start to make complex manipulations, it is worth noting that in some cases, a quiet sound is the result of wear of the component or factory defect. However, in most situations, you can fix the situation yourself without going to the service center. Next, we will discuss in detail the algorithms of actions that will help you regain confident audibility.
Diagnostics and physical cleaning of dynamics
The first and most obvious step is to check the physical condition of the device, and during operation, the speaker's grid inevitably gets dust, pocket pile and skin fat, and these contaminants create a dense cork that physically blocks the output of the sound wave, making the sound deaf and quiet.
To begin, carefully examine the top of the screen in good lighting. If you see a gray plaque or black dots in the holes, you need to clean. Use a soft toothbrush with dry bristles or a special sticky tape to clean the equipment. Carefully, without much pressure, walk along the surface of the mesh, sweeping the dust out.
It's also worth checking if there's a protective film or glass with a cutout that covers part of the dynamic emitter. Even a minimal shift of the accessory can reduce the volume by 30-40%. Remove the protective glass and wipe the speaker area with an alcohol wipe to degrease the surface.
⚠️ Warning: Never use sharp objects such as needles or pins to pick through the speaker grid.You can damage the membrane or push dirt even deeper, leading to irreversible sound deterioration.
After cleaning, run a test call, and if the sound is louder but still not loud enough, go to software tuning methods, and physical purity is the base, without which software tricks can not have a full effect.
Basic sound setting in the Android system
Before you go into the hidden settings, make sure that all standard sliders are twisted to the maximum. In the MIUI shell, sound control is divided into several categories, and sometimes users forget to raise the volume specifically for calls while listening to music.
When you talk, press the side volume button. A scale will appear on the screen that will have the phone icon next to it. Make sure you adjust that setting, not the multimedia volume. Also go to Settings → Sound and Vibration and check if Quiet or Do Not Disturb mode is activated, which can limit the maximum signal level.
Another important feature is "Sound Improvement." Some versions of the Redmi Note 8 firmware include the option "Mi Sound Enhancer" or "Sound Adaptation." Try changing the equalizer to "Clear" or "Voice" mode, if available, which can emphasize the frequencies a person is speaking.
- 📱 Make sure that the call and call volume slider is at maximum.
- 🔇 Turn off power saving modes that may limit the audio codec.
- 🎧 Make sure that no third-party audio device is connected to Bluetooth settings that intercepts sound.
If standard settings don’t work, you should pay attention to the specific models of headphones or headsets you use, sometimes the problem lies in the incompatibility of the impedance of the accessory and smartphone.
Using an engineering menu to amplify sound
The most effective method for power users is access to the MTK Engineer Mode engineering menu. Since the Xiaomi Redmi Note 8 is built on the basis of the MediaTek processor, this tool allows you to directly control the amplification of audio channels at the hardware level.
To enter the menu, open the Phone app and dial the combination ##3646633##. If the code didn't work, your firmware version may be blocking access. In this case, you can try downloading the MTK Engineering app from the Play Market. After logging in, go to the Hardware Testing → Audio → Audio Debugging path.
In the menu that opens, you'll see the Type tab. Select Normal, and in the Level list, select Level 0 or Level 1. We're interested in Digital Gain. The default is a value like 132 or 140. It can be neatly enlarged. Don't maximize it right away, it can lead to wheezing and distortion.
Change the value in steps of 5-10 units and after each change press the Set button. Then make a trial call to evaluate the result. The optimal value is a value at which the sound is loud, but does not yet begin to crack at high frequencies.
☑️ Checking before changing Gain
⚠️ Warning: Changing the parameters in the engineering menu can overload the speaker and cause it to fail. You make any changes at your own risk.
It is worth noting that after resetting the phone or updating the firmware, these settings can return to factory settings, in which case the procedure will have to be repeated, and in some global versions of MIUI, access to the change (Gain) may be limited software.
Application of third-party amplifiers
If you're messing with the engineering menu, Google Play Store apps specifically designed for volume boosting come to the rescue. They're software-based, amplifying the audio signal before it's sent to the speaker. One of the most popular and proven solutions is the Volume Booster GOODEV app.
The way these tools work is simple: they create a software layer on top of the Android system mixer. Once you install the application, you'll need to put a gain slider. Usually, a range of 20 to 40 percent is considered safe. Exceeding this threshold often leads to severe distortions, because the speaker has physical power limitations.
It is important to understand that using such applications increases the load on the processor and battery. The smartphone can heat up during long conversations. In addition, some antiviruses or the MIUI system itself can aggressively unload such applications from memory to save energy.
- 🚀 Volume Booster GOODEV — Simple and easy application with one slider.
- 🔊 Super Volume Booster – allows you to adjust the amplification for different types of sound.
- 🎚️ Precise Volume – gives detailed control over 100 volume levels instead of the standard 15.
To keep the amplifier running, add the app to the boot list and exclude from battery optimization. Go to Settings → Applications → Application Management, find your booster, and select No Limits under Battery.
Why does the sound hoarse at 100% amplification?
Comparison of volume-raising techniques
To make it easier for you to choose the right way, we have systematized the basic methods in the table, each with its own advantages and disadvantages, which should be considered by owners of Redmi Note 8.
| Method | Efficiency | Risk to the device | Difficulty |
|---|---|---|---|
| Physical cleaning | Medium | Low. | Low. |
| Engineering menu | Tall. | Medium. | Tall. |
| Booster applications | Medium | Low. | Low. |
| Change of region | Low. | Low. | Medium |
As you can see from the table, cleaning is the safest method, and the most effective is working with the engineering menu, but for the average user, the optimal balance is the use of specialized applications.
Separately, you can choose a country in your phone settings (Settings → Additional Settings → Region), like India or Nepal. Some firmware versions for those regions have a standard louder speaker set than for Europe or Russia, a safe software trick that doesn't require any extra software.
💡
If you have changed region, check NFC and other location-specific features, and in some cases, banking applications may require re-authorization.
Removing software failures and resetting settings
Sometimes a quiet sound is caused by a software conflict or an audio driver error, and if the volume goes down abruptly after you upgrade your system or install an application, you should try resetting your audio settings, using the hidden code ##6484##, which opens the CIT test menu.
In the test menu, select Receiver, the test will run and you will hear the tone. If the test mode is loud and clear, then the hardware is correct, and the problem lies in the settings of the system or a particular application (for example, in the messenger), and if the test mode is silent or intermittent, there is likely a hardware malfunction.
As a radical method, you can perform a full Wipe Data reset. Before you do that, make sure to back up all the important data to the Mi Cloud or your computer. Reset will return all system parameters, including audio configs, to factory status.
⚠️ Warning: Full reset will delete all your contacts, photos and apps. Make sure you have an up-to-date copy of the data before clicking the Reset button".
After reset, don't rush to install hundreds of applications at once. Check the volume on the "clean" system. If the problem persists even on the factory firmware without third-party software, it is almost guaranteed to indicate wear and tear of the speaker or oxidation of the plume contacts.
💡
If neither cleaning, nor software settings, nor resetting did not help - the problem is hardware in nature and requires replacing the speaker in the service center.