Modern smartphones line Xiaomi, Redmi and POCO They have powerful multimedia capabilities, but users often experience poor audio output, and quiet sound, frequency imbalances, or de-synchronization of video audio can ruin the experience of listening to music or watching movies. This is especially true when using wireless devices and TWS-models where volume control is tied to software algorithms MIUI or hyperos.
Fortunately, the Android operating system installed on Xiaomi devices provides extensive tools to fine-tune the sound tract. You don't need to be a sound engineer to fix the situation. It's enough to go through several stages of diagnosis consistently and activate hidden features that by default can be disabled by the manufacturer for "hearing safety."
In this article, we'll look at all the methods available, from basic menu settings to engineering mode, how to remove volume limit, adjust the equalizer to your genre of music, and solve the problem of quiet sound in Bluetooth headphones. Proper calibration can unlock the potential of even budget models of headsets.
Basic sound setting through the system menu
The first thing to start with is the standard operating system settings menu, and many users ignore the Sound and Vibration section, relying only on the side volume buttons, but this is where the key switches that affect the quality of audio streaming are hidden. Go to Settings → Sound and vibration and carefully study the options available.
Note the sound quality and effects. Depending on your smartphone model and firmware version, this section may be called differently, but the functionality remains similar. There is often a Mi Sound switch that adapts the audio output to the type of headphones connected. If you have a headphone insert, be sure to select the appropriate profile so that the system correctly allocates the frequencies.
⚠️ Attention: Activating the Absolute Volume feature in Bluetooth settings sometimes causes the volume sliders on your phone and headphones to stop syncing. If you encounter such a problem, try turning this option off in the developer menu.
There's also an equalizer in this section, and you don't have to neglect the standard presets like Pop, Rock, or Jazz. Manually adjusting the frequency sliders can give you a more accurate result. Try to raise the high frequencies a little bit for more detail and the bass for depth, but don't overdo it to avoid distortion.
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Use either the “Mi Sound” or “Dirac” function (if available in your model) by selecting the “Intrachannel” or “Intra-Earphone” type for the most accurate frequency range calibration.
Volume control of Bluetooth devices
One of the most common problems Xiaomi owners have is quiet sound in wireless headsets, which is because Android and iOS handle volume control commands differently, and in some cases, the system limits the maximum output level to protect the user's hearing, but for many, this becomes an obstacle.
To solve the problem, you need to activate additional settings. Go to Settings → About Phone and press 7-10 times on the MIUI Version (or OS Version). This will open access to the hidden menu. Next, go back to the main settings, go to Additional → For developers. Find the item “Absolute Volume”.
- 🎧 Try to switch the “Absolute Volume” slider to the off position if the volume jumps.
- 🔊 Turn on “Absolute Volume” if the headphones sound too quiet and do not respond to buttons on the body.
- 🔄 Reset your Bluetooth connection settings in the same menu if your devices are not running smoothly.
- 📱 Make sure that the volume slider in the Media menu is twisted to the maximum separate from the system sound.
When you change these settings, it is recommended to completely reboot your smartphone and reconnect your headphones, often allowing the system to re-friend the codecs and volume levels. If the sound is too loud and cuts your hearing, return the settings back or turn down the volume with physical buttons on the headset itself.
Use of built-in equalizer and effects
Deep audio tuning is impossible without using an equalizer. Xiaomi smartphones often preinstalled an audio engine from Dirac or Waves, which provides more advanced tools than standard Android. To access them, go to Settings → Sound and Vibration → Sound quality and effects.
Here you'll find a graphical equalizer. Don't be afraid to experiment with frequencies. For vocal music, you usually raise the average frequencies; for electronic music, you usually raise the low and high frequencies; a graphical interface allows you to visually assess the balance; and there's also a feature called "Improving Sound" that dynamically compresses the audio stream, making quiet sounds louder and louder softer.
| Type of music | Low frequencies (Bas) | Mid-frequency | High frequency (HF) |
|---|---|---|---|
| Pop music. | +2 dB | 0 dB | +1 dB |
| Rock/Metal | +3 db | +1 dB | +2 dB |
| Classic. | 0 dB | +1 dB | +3 db |
| Electronics | +4 dB | -1 dB | +2 dB |
Remember that over-amplifying certain ranges can lead to wheezing, especially at maximum volume. Digital amplification has its limits, dictated by hardware. If you hear distortion, lower the sliders.
What are the AptX and LDAC codecs?
Engineering menu and fine calibration
For advanced users who are not afraid to get into the system settings, there is an engineering menu that allows you to adjust the sound amplification at the hardware level. Be careful: improper setting can lead to overloading of the earphone speakers. Sign in through the code set # # #6484## in the Phone app.
On the menu that opens CIT (Calibration & Test, you have to find the audio section, and it can be different, often it's Receiver or Speaker, and you can check the channels and, in some versions of the firmware, change the Gain. Vol_Level or Mic Gain.
⚠️ Warning: Changing the values in the engineering menu can lead to irreversible changes in the operation of the audio chip.
If you CIT-There is no way to change the gain, which means that the manufacturer has blocked this function at the software level, in which case it is not recommended to install third-party patches, as this can disrupt the stability of the system.
☑️ Check before changing the engineering settings
Third-party applications for sound amplification
If the built-in funds are not enough, the Google Play Store apps come to the rescue, with Precise Volume or Volume Booster GOODEV being the leader in this niche, which allows you to increase volume above the system limit and have their own powerful equalizers.
When using volume boosters, it is important to be aware of the risks: software-based amplification can cause the headphone membrane to fail, especially if it is inexpensive. Use such applications dosed, raising the volume by no more than 10-15% of the maximum.
- 📈 Precise Volume – Up to 100 volume levels instead of the standard 15.
- 🎛️ Poweramp Equalizer – Professional equalizer with support for most audio codecs.
- 🔊 Flat Equalizer is a simple and easy option for fast bass adjustment.
Installing a third-party equalizer often requires disabling Xiaomi's built-in effects to avoid conflicts. If after installing the app, the sound is gone completely or there is a lot of noise, delete the app and restart the device. Compatibility of third-party audio drivers with MIUI is not guaranteed and depends on the Android version.
Solving problems with desynchronization and cracking
Sometimes volume control is unnecessary because the problem is latency or intermittent cracking, which is typical for a Bluetooth connection in a noisy ether setting. Try turning off the "Use AAC" function in Bluetooth settings, or turn it on if it's turned off.
Also worth checking is if Monoaudio is enabled in the Special Features section, which sums up stereo channels into one, which can create a "flat" and quiet sound experience. Make sure that the balance of channels (Left/Right) is set strictly in the center.
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If the sound is interrupted in only one app (like YouTube), the problem is most likely in the app's cache, not the system.
In the case of permanent coding in wired headphones through a 3.5 mm connector, the problem may be physical. Dirt in the connector or incompatibility of standards (CTIA vs. OMTP) can have this effect. Try to clean the connector gently or use the Type-C adapter if it is included.