When you stop hearing someone during an important conversation because of a quiet sound, this is a familiar problem for many smartphone owners, especially on devices with a MIUI shell, where software restrictions sometimes lower the limit of sound for hearing safety or because of the specifics of regional settings. If your Xiaomi has become quieter, do not rush to carry it to the service center, since in most cases it is solved by software methods.
Low volume can be caused by a variety of factors, from the corny contaminated speaker grid to downed equalizer settings or Bluetooth headset system constraints. In this article, we will look at all the existing ways to amplify sound, from basic checks to advanced manipulation of the engineering menu. Attention: some methods require accuracy, but when executed correctly they are absolutely safe for your device.
Before we get to the complex settings, we need to rule out hardware and simple software failures. Often users forget that media volume and call volume are different parameters that are independently controlled, and it's worth checking if the device is connected to external audio devices that can intercept sound.
Basic sound settings and speaker cleaning
The first step is always to check the physical elements and the standard settings, and the case of a Redmi or Poco smartphone has a speaker hole that gets clogged with dust, pocket pile and skin fat over time, which physically blocks the sound wave output, making the sound deaf and quiet.
To clean, use a soft toothbrush or a special sticky tape to clean the appliances. Carefully walk along the speaker grid to remove contaminants. Do not use sharp objects such as needles or pins, as you risk damaging the speaker membrane or pushing dirt even deeper inside the case.
After physical cleaning, check the software sliders. Press the volume button and tap the gear or triplet to unfold the full mixer. Make sure the Call Sound or Call Loudness slider is twisted to maximum. Some versions of MIUI have a separate slider for Bluetooth devices that is also worth checking if you use a headset.
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Use the Dictator app or turn on speaker during a call to see if the speaker is working at all. If the speaker is clear and loud in speaker mode and quiet in normal, the problem may be in the speaker or plume itself.
It is also important to check whether Do Not Disturb or Silence mode is activated, which can visually show high volume but programmatically block audio notifications. In the audio settings, look for the Do Not Disturb section and make sure it is disabled or configured correctly.
Set up the equalizer and Dolby Atmos
The MIUI has powerful built-in audio tools that users often ignore. Xiaomi smartphones often feature Dolby Atmos technology or a proprietary sound engine that can dramatically change the perception of sound. You can access these settings through the Sound and Vibration menu -> Sound Effects.
So here you can choose a sound profile, "Music," "Film," "Game" or "Voice," and to improve the intelligibility of speech during calls, the best way to do that is to have a Voice profile or a manual equalizer setting, and if you choose manual mode, you'll see a frequency chart.
- 🎚️ Lift sliders in the mid-frequency range (approximately 500 Hz to 2 kHz), as this is where human speech lies.
- 🔊 Increase the overall volume (Master Volume) if this option is available in your firmware version.
- 🎧 Turn off Smart Script Selection if the sound gets too quiet in certain apps.
Using an equalizer can compensate for the shortcomings of the speaker, making the voice of the interlocutor clearer and more penetrating, but do not raise all frequencies to the maximum, as this can lead to wheezing and distortion, especially at maximum volume.
☑️ Customization of sound effects
It is worth noting that some global firmware versions may not have a Dolby Atmos section, so you can try installing third-party equalizer apps from Google Play that have root access or work through system permissions.
Engineering menu: hidden volume settings
The most effective way to increase volume at the software level is to use the engineering menu, which is a hidden part of the system for engineers to adjust the signal amplification levels for different scenarios of the phone, and accessed through a special code in the Phone application.
Dial the code ##6484## or ##3646633##. If the code is not working (some newer versions of MIUI have no access), you can use the MTK Engineering Mode app or the Snapdragon CPU app. You need to find the Hardware Testing -> Audio -> Audio Debugging section.
In the menu that opens, you'll see a list of profiles: Normal, Headset, Speaker, Handfree. We're interested in Normal (normal mode) or Handfree (loud communication). Select Type: Sph (sphere, that is, voice of the interlocutor). You'll see Level and Max Vol.
| Parameter | Description | Recommended action |
|---|---|---|
| Level 0-6 | Volume levels (buttons +/-) | Increase the values by 10-15 units |
| Max Vol | Maximum volume | Raise to 160 (maximum 255) |
| Digital Gain | Digital Strengthening | Careful not to exceed 6 dB |
| Ana Gain | Analog reinforcement | It is better not to touch without experience. |
Risks of changing the engineering menu
When you change your values, make sure you press the Set button to apply the settings. The changes take effect immediately. If the sound starts to wheez, put the values back. It's not recommended to set maximum values right away, it's better to act gradually.
Third-party applications for sound amplification
If system settings aren’t enough, Google Play Store apps come to the rescue, which can programmatically amplify the signal by bypassing Android’s limitations. One of the most popular and proven solutions is the Volume Control GO or Precise Volume app.
These apps create a virtual layer on top of the system mixer, allowing you to twist the volume above 100%.The principle of their work is to digitally amplify the audio stream before sending it to the speaker. This is especially true for Xiaomi Redmi Note series models, where speakers often have average power.
- 📲 Install the Volume Control app GO log-store.
- 🔊 Give the necessary permissions to change system settings.
- 📈 Use the amplifier slider during the call for instant adjustment.
It is important to understand that using these applications increases power consumption, the battery will run out faster during a conversation, as the processor has to process the audio stream more actively, and there may be small delays in sound (latency).
Some antivirus or MIUI optimization programs may aggressively close such applications in the background. To avoid this, add a volume amplifier to the battery exclusion list and allow auto-start in the Security settings of the application.
Problems with Bluetooth headsets and headphones
Special attention should be paid to the situation when a quiet sound is observed only when connecting wireless headphones or headsets in the car.The Bluetooth protocol has its own volume limitations, and sometimes the smartphone and headset can not properly synchronize levels.
In Android 10 and above, as well as newer versions of MIUI, the logic of "Absolute Volume" has been changed. If your Bluetooth device is quiet, try turning it off from the developer menu. To log into the developer menu, click 7 times on the build number in the About Phone section.
In the developer menu, find Disable Absolute Volume. If it's on, turn it off, and vice versa. Reboot your phone and reconnect the headset. This action often solves the problem of desynchronizing volume sliders.
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Bluetooth volume synchronization is a common cause of silent sound, and switching the option "Absolute Volume" to the developer menu solves the problem 80 percent of the time.
It's also worth checking the settings of the earpiece itself. TWS-Headphones have their own app (such as Mi Earbuds or Xiaomi Wear) where you can adjust the equalizer and volume level regardless of the phone.
Hardware malfunctions and repairs
If none of the software methods worked, and the sound remains quiet even after the settings are reset, there is a high probability of hardware failure. The speakers are consumables, and over time their membrane can degrade, lose elasticity or partially break down.
Another common cause is the oxidation of the contacts of the speaker plume, especially if the phone is in a wet environment, in which case the sound may disappear, then appear, accompanied by cracking, in which case it is necessary to disassemble the device and clean the contacts with alcohol or replace the module.
⚠️ Attention: If after the fall of the phone the sound became much quieter or there was a metal sound, most likely damaged the speaker or moved its connector from the motherboard.
You can run a built-in test for diagnostics. In the Service app or in code ##64663##, select Receiver and Speaker. The phone will play the test tunes. If the test sound is loud and clear, and in life it is quiet, the software problem. If the test is quiet, the hardware problem is.
Replacing the speaker is a fast and inexpensive procedure, and in authorized Xiaomi service centers, original parts are changed in 30-60 minutes. Using non-original speakers can cause the sound to become even quieter or have a porridge effect in the voice.