Xiaomi’s current MIUI 12 smartphones offer users a lot of features, but sometimes standard audio settings are not enough. Device owners often face a situation where when wired or wireless headsets are connected, the audio signal level seems too low, especially when listening to music in noisy places or watching movies without subtitles.
There are a number of reasons for quiet sound, from the software limitations of regional firmware versions to the banal contamination of speakers or Bluetooth codec settings. In this article, we will explore all the available ways to increase volume, from standard sliders to advanced methods through the engineering menu.
Before you get to the tricky manipulations, make sure the problem isn’t physical audio blocking or software failure. MIUI 12 has a complex audio driver structure, and a competent setup can work wonders even with standard budget headphones.
Basic verification of sound and connection settings
The first step is always to review the basic parameters. Often users forget that the system can store independent volume profiles for different types of connections. Make sure that the media slider is twisted to the maximum at the time the sound is played through the headset.
It’s also worth checking if Silence or Do Not Disturb mode is activated, which in some scenarios may limit the maximum amplitude of the sound wave. Go to Settings → Sound and Vibration and carefully examine all the switches available.
If you are using wireless TWS-So if you have headphones, try turning them off in the Bluetooth menu and then pair them again, sometimes the connection protocol gets knocked down and the device goes into power saving mode, sacrificing the quality and volume of the sound.
- 🎧 Check that the Media slider is raised to the point when the headset is connected.
- 🔇 Make sure no sound mode is turned off in the side control panel.
- 📱 Reboot your smartphone to reset the system’s temporary audio buffers.
⚠️ Warning: If the sound remains quiet after rebooting and checking the sliders, the problem may be software limitations on your regional firmware (e.g., the EU version has volume limits).
Use of the built-in Dolby Atmos equalizer
The MIUI 12 shell is often equipped with Dolby Atmos technology, which not only creates surround sound, but also allows you to significantly amplify the signal, access to these settings is in the same menu "Sound and vibration", activating this mode can dramatically change the perception of audio.
Inside the equalizer menu, various presets are available, such as Music, Film or Voice. For maximum amplification, choose Music mode or create your own profile where you can manually lift all frequency sliders. However, be careful: excessive low frequency raising can lead to wheezing.
Special attention should be paid to the function of “Smart amplifier” or similar names depending on the model of the smartphone, this option dynamically adjusts the volume to the ambient noise, which is especially useful outdoors.
- 🎚️ Enable Dolby Atmos in the sound settings to expand dynamic range.
- 🎼 Choose Preset Bright or Pop to increase high and medium frequencies.
- 🔊 Activate the automatic volume adjustment function under the medium.
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When manually adjusting the equalizer, don't lift all sliders to zero, it will cause severe distortions. It is better to make the lift in the form of a gentle arc, leaving the extreme frequencies just below the central ones.
Setting the absolute volume of Bluetooth
One of the most common causes of quiet sound in wireless headsets is the desynchronization of the volume of the phone and the headphones themselves.The Bluetooth protocol allows the control device (smartphone) and the playback device (earphones) to have independent volume levels if the absolute volume function is not enabled.
To fix this, you need to get into the developer menu. Go to Settings → About Phone and quickly click on MIUI Version seven times. Once you have become a developer, go back to the main settings menu.
Next, follow the path Additional settings → For developers. In this list, you need to find the item "Disable absolute volume." If it is turned off, turn it on. If it is on, try turning it off. After that, be sure to reconnect the Bluetooth device.
Settings → About Phone → (7 times tap according to MIUI) → Additional settings → For developers → Turn off absolute volume☑️ Bluetooth setup for developers
Engineering menu and deep audio calibration
For advanced users who are not afraid of technical terms, there is an access to the engineering menu, which is a powerful tool to adjust the parameters of the audio driver at a low level. Entering code ##6484## or ##3646633## gives access to testing equipment.
You can find the Hardware Testing tab in the test menu, then go to Audio → Audio Debugger, where you can select Speech or Media mode and increase the Gain for the corresponding volume levels. Be extremely careful: setting maximum values can lead to overloading and burning of speakers or headphones.
Changing the parameters in the engineering menu requires accuracy, and it is recommended that you write down the initial values before making changes so that if the sound quality deteriorates, everything can be returned back, a method that is especially effective for Chinese firmware versions, where the limits can be tighter.
⚠️ Warning: Changes to the settings in the engineering menu are made at your own risk.Incorrect calibration can lead to irreversible damage to the audio codec of the smartphone.
What do I do if the codes don't work?
Third-party applications for sound amplification
If there are not enough system tools, Google Play apps come to the rescue, which act as software amplifiers, and they process the audio stream before it is sent to the DAC, artificially increasing the signal amplitude. One popular solution is the Volume Booster GOODEV app.
Another powerful tool is Poweramp Equalizer, which has its own audio processing engine that bypasses the standard system constraints, which allow you to add Boost amplification above 100%, but as with the engineering menu, it is important not to overdo it.
Using third-party software can consume additional battery power as the processor will be more active in processing the audio stream, and some applications require root rights to fully access the audio subsystem, although the basic amplification works without them.
- 📲 Install a verified volume booster from the official app store.
- ⚙️ Set the Boost level to no more. 20-30% wheezing.
- 🔋 Keep an eye on battery consumption as sound processing requires resources.
Comparison of volume-raising techniques
The choice of method depends on your headphone model, the version of MIUI and your willingness to risk the stability of the system. Below is a table that will help determine the best way to solve the problem of quiet sound.
| Method | Security | Efficiency | Difficulty |
|---|---|---|---|
| Equalizer settings | Tall. | Medium | Low. |
| Absolute volume BT | Tall. | High (for BT) | Medium |
| Engineering menu | Low. | Very high. | Tall. |
| Third-party annexes | Medium | Tall. | Low. |
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The safest and most effective way for most users is to combine the equalizer setting and the Bluetooth absolute volume check.