Users of Xiaomi, Redmi and POCO smartphones often face situations where the device stops playing audio or the volume becomes critically low, which can occur for various reasons, from accidentally pressing the No Sound button to software failures in the shell of MIUI or HyperOS. It is important to understand that the multimedia management system in Android is complex, and different types of sounds are responsible for separate channels.
In this article, we’ll look at all the possible ways to activate and customize audio on your device, not only standard buttons, but also hidden engineering menus that allow you to amplify the output signal, and learn how to deal with regional volume restrictions that are often found in Chinese versions of smartphones, and how to adjust the equalizer for maximum sound quality.
If you are faced with complete silence, do not rush to carry the gadget to the service center. In most cases, the problem is solved software in a few minutes. Below are detailed instructions that will help you return full sound to your device, whether it is Xiaomi Mi 11, Redmi Note 12 or more recent models.
Basic methods of volume control
The most obvious, but often ignored, way is to check the physical buttons on the body, and on the side of the smartphone are the volume keys, and short-term pressing increases or decreases the sound level, but it's important to understand which channel you're changing, and the system responds contextually: if you press a button while watching a video, the volume of the media changes, and if you're in standby mode, the volume of the call.
When you press any of the buttons, you have a slider on the screen, and you click on the gear icon or the three dots next to the slider to expand the full menu, and you'll see the individual controls for:
- 🔔 Call – the volume of incoming calls.
- 🎵 Multimedia – Sound in Games, Video and Music.
- 🔔 Alarm clock – regardless of other settings.
- 📢 Notifications – System sounds and messages.
Make sure that none of the sliders are moved to the leftmost position. Also check if the "No Sound" or "Do Not Disturb" mode is activated. In the latter case, the sound can be turned on, but it can be blocked software for certain contacts or applications. For a quick check, swipe top-down to open the Control Panel, and make sure that the speaker icon is not crossed out.
⚠️ Warning: Do Not Disturb mode can be set to schedule. If the sound is gone at a certain time of day, check the automation in the settings of this mode.
Sometimes users forget about connected wireless devices. If your Xiaomi has Bluetooth headphones or a speaker connected, the sound can be output on them, not on the phone speaker. Turn off Bluetooth in the quick access panel and check if the sound came from the main speaker.
Customize audio through the system menu
For a deeper setup, go to the main settings menu. The path may vary slightly depending on the shell version, but the logic remains the same. You need to find the section responsible for the audio. In modern versions of HyperOS and MIUI 14, it is often called "Sound and Vibration".
There's a lot of advanced settings inside this section, and you can not only turn on the sound, but you can also pick out the tunes, you can set the vibration when dialing, you can activate the sound of the touches, and you should pay special attention to the "Additional Sound Customizations" item, which is where important features like Mi Sound Enhancer are hidden.
Activating Mi Sound Enhancer allows you to select an equalizer profile (Pop, Rock, Jazz) or adjust frequencies manually. This is especially useful if you don't have enough standard sound. Also on this menu is the Sound Adaptation switch, which automatically adjusts the frequencies to the connected headphones.
Be sure to check the settings for specific applications. Some versions of MIUI have Audiovisual Effects, which can override system settings. If you use third-party players, make sure that their own settings do not include quiet mode or volume limit.
Solving the problem of quiet sound in headphones
A separate category of problems is associated with low volume in wired or wireless headphones, often due to the desynchronization of the volume levels of the phone and headset, and there is a proven algorithm of actions to solve this problem that helps in 90% of cases.
☑️ Volume synchronization algorithm
First, turn off Bluetooth completely on your smartphone. Then put your headphones in your case or turn them off. Then turn on Bluetooth on your phone and do the pairing again. When the connection is set, start the music and push the volume on your smartphone to maximum, and then lower it to a comfortable level. This action "teaches" the system the right range.
For wired headphones with a 3.5mm connector, the problem may be socket contamination or standards incompatibility (CTIA vs. OMTP).Wash the connector with dry soft cloth. If you use a Type-C to 3.5mm adapter, make sure it supports sound output (DAC) rather than just charging.
⚠️ Note: Using cheap, uncertified adapters can lead to the phone not recognizing headphones as an audio device, but instead treating them as a charger.
Owners of Chinese versions of smartphones may face a software volume limit in headphones, which is in place in the European Union to protect hearing, bypass this restriction through the engineering menu, but do this with caution so as not to damage the dynamic range of headphones.
Engineering menu and hidden settings
If standard methods don't work, you can use the engineering menu, which is a hidden part of the system, designed for testing equipment, accessed through the Phone app. Enter the code ##6484## or ##3646633#. Different Xiaomi models may have different codes, sometimes requiring a third-party application, such as Engineering Mode MTK.
Once you're on the menu, select the Hardware Testing tab. We're interested in Audio. Here's a list of tests for different modes: speaker, speaker, headphones. Select the desired mode (for example, Speaker for the main speaker) and click Get Gain Level or Set Gain Level.
You'll see Gain sliders for different scenarios (Level 0-6). Level 6 is the maximum volume. Make sure the values are not zero. However, changing those values above the factory can cause the speakers to wheez or crash completely. Be very careful.
| Parameter | Description | Recommended action |
|---|---|---|
| Audio Volume | Total signal amplification | Check if it's worth 0 |
| Digital Gain | Digital Strengthening | Don't change it unless you need to. |
| Analog Gain | Analog reinforcement | Calibrate only with knowledge of the matter |
| Test Tone | Test horn | Use it for inspection |
After you make the changes, make sure you press Set or Save, or the settings won't apply. Reboot the device to make the changes effective. If you reset the settings back to the original settings after reset, then the system blocks the changes at the firmware level.
What to do if the engineering menu is not opened?
Resolving programmatic failures and conflicts
Sometimes the sound goes missing because of an application conflict or accumulated system debris. First, force the device to restart. Press the power button for 10-15 seconds. This will clear the RAM and restart the audio drivers.
If the reboot didn't work, check to see if the mono-sound mode is on, which may misallocate channels. Path to setup: Settings → Advanced Settings → Special. features → Hearing. Make sure the Mono-audio switch is off if you don't have specific hearing requirements.
It’s also worth checking the list of installed apps. Recently installed programs, especially those that control sound (equalizers, voice recorders, calls), can intercept the audio stream. Try uninstalling newly installed apps or running your phone in Safe Mode. To enter this mode, press the off button, and then keep your finger on the “off” icon on the screen for a long time until you are prompted to switch to Safe Mode.
In Safe Mode, only system applications are running, and if that mode is sounding, it means it's a problem with third-party software, and remove the apps one at a time, and check the results to find the culprit.
Diagnostics of hardware faults
When software methods are exhausted, it remains to check the hardware. Speakers are physical devices that can fail due to moisture, dust or impact. Do a visual inspection of the speaker grids. If they are clogged with dust, clean them carefully with a soft toothbrush. Do not use sharp objects to avoid piercing the membrane.
Check if there's any moisture in the case, even if the phone has protection. IP68, The leakage is broken over time (LCI) are inside the slot SIM-If the indicator turned red, it means that the device was exposed to water, and corrosion could damage the audio track.
⚠️ Warning: If the sound becomes quiet or hoarse after moisture is injected, do not try to dry the speaker with a hairdryer or on a battery. High temperature melts the glue that holds the speaker together and damages the membrane.
Another sign of hardware failure is that there's a crack or a wheezing at maximum volume, even when you're playing a clean tone, which suggests that the diffuser is broken or unstuck, and then software tweaking won't help, you'll need to change the module.
💡
If the sound is completely absent even at maximum volume and after resetting the settings, and in the engineering menu the speaker test shows an error - this is 100% a sign of hardware breakdown.