Xiaomi and Redmi users often face a situation where notifications from messengers are no longer audible or playback is incorrect, due to the peculiarities of the MIUI shell, which has a complex audio management hierarchy. Unlike pure Android, here the audio settings are divided between system parameters, application rights and physical buttons.
Understanding where to look for a slider allows you to quickly return loud and recognizable alerts for new emails. In this article, we will take a detailed look at all levels of settings so that you no longer miss important messages. Deep tuning requires attention, but the result is worth it.
Sometimes the problem is not software failure, but the simple switching of the profile of the device. Before you climb into the jungle menu, you should check the physical condition of the gadget. Make sure that the speaker is not covered with a case and not contaminated with dust, as this physically blocks the sound wave.
Check physical switches and system profiles
The most obvious but often overlooked reason for the lack of sound is the activated Do Not Disturb or No Sound mode. Many Redmi models may not have a physical slider on the side of the case, like the iPhone, so the control is software-based. If you see a crossed-out speaker in the notification curtain, the sound will not work.
To switch profiles, you have to lower the curtain from top to bottom and find the corresponding widget. In some versions of MIUI, this element is hidden in the second page of the control panel. Pressing the icon changes the mode of operation of the speakers and the vibrator.
- 🔇 No Sound mode completely shuts down the audio output, leaving only vibration.
- 🌙 Do Not Disturb Mode blocks sounds and screen, skipping only selected contacts.
- 🔔 Standard mode restores all audio notifications by default.
It's important to distinguish between the overall volume of media and the volume of calls. Sliding on the side of the video changes the media track, but does not necessarily affect the system sounds of notifications.
Volume setting through system mixer
In the Android operating system installed on Xiaomi, there is a separation of sound streams, which means that the volume of music, call and notifications of applications is regulated independently of each other. If you add the volume of media files, but the sound of messages remained quiet, the problem is this separation.
To access full control, press the volume button on the smartphone body. When the scale appears on the screen, click on three dots or the gear icon to the right of the slider. This action will reveal an extended menu where all categories of sounds are available.
In the window that opens, find a slider with a bell icon or a "Notification" caption that's responsible for how loud WhatsApp will sound. Move it to the right to the maximum value. It's also worth checking the "System Sound" slider, as some system alerts depend on it.
⚠️ Warning: Don't confuse the Media slider with the Notifications slider. The volume of YouTube videos and the sound of a WhatsApp message coming are different channels of playback.
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If the notification slider is gray and doesn’t move, try rebooting your smartphone – it often resets the audio driver’s software “glitch.”
Managing sound directly in the WhatsApp app
Even if the system settings are perfect, there are limitations within the messenger itself. WhatsApp allows you to customize the sounds for each chat separately, as well as set general parameters. If you accidentally set “No Sound” for a particular contact, the system volume will not help.
To set up globally, open the app, go to the menu (three dots in the corner) and select Settings → Notifications. This is where you find the settings for incoming messages and calls. Make sure the Notification Sound switch is active.
Click on "Notification Sound" to select a tune. The list may be empty if memory is not allowed, but standard tones must be present. The "No Sound" option on this menu prioritizes system settings.
- 🔊 Message tone: Selects a melody for all incoming text messages.
- 📞 Tone of call: Sets ringtones for voice calls through the app.
- 💬 Chat Sound: allows you to set up an individual alert for a specific correspondence.
It is worth noting that app updates sometimes reset the settings to the standard, so if the sound is lost after the WhatsApp update, the check should start from this section, and the internal settings of the application are higher priority than the general system.
☑️ Checking the settings inside WhatsApp
Notifications Permits and Management in MIUI
The MIUI and HyperOS shells are notorious for aggressive energy savings and strict control over applications.The system can block audio playback if it believes the app has no right to distract the user in the background, a common reason WhatsApp is silent.
Go to Settings → Notifications and Status bar → Notification management. Go to WhatsApp. Make sure the Allow Notifications switch is active. Below is a list of categories: Messages, Groups, Calls. Click on category text (not the switch) to enter the detailed menu.
In the detailed menu, make sure you select the “With Sounds and Vibrations” display type. If it’s “No Sound” or “In the Curtain Only”, the phone will vibrate or just show the icon, but not make a melody. Also check if the “Important” (or “Urgent”) check box is worth checking, as this affects priority.
| Parameter | Recommended value | Impact |
|---|---|---|
| Allow notices | Included. | Basic display permit |
| Sound. | Included. | Allows audio playback |
| Important notifications | Included. | Ignoring the "Do Not Disturb" mode |
| Display on the lock screen | Included. | Shows text when the phone is locked |
Special attention is paid to the category “Important notifications”: in the new versions of Android on Xiaomi, this allows sound to pass even in sleep mode, but abuse of this mode can consume the battery faster.
Why are the settings resetting?
Set up the category "Notifications" in special features
Some firmware versions have a separate level of control for people with hearing or vision impairments that can overlap standard settings, although this is rare, it should not be ruled out, especially if the sound has become intermittent or quiet.
Go to Settings → Advanced Settings → Special Features. Check the hearing-related sections. Make sure that monosound features are not enabled if they conflict with stereo notification tracks or background noise suppression modes.
Also in Settings → Sound and Vibration → The option “mono-audio” may be included, and turning on it sometimes changes the way system signals sound, making them less distinguishable. Try switching this option and checking the result.
If you have Bluetooth headphones or smartwatches connected, the sound can be redirected to them. Check if the output to the external device is active. Xiaomi's system sometimes "forgets" to switch the channel back to the speaker after the headset is turned off.
⚠️ Note: When you connect a Bluetooth headset, the notification sound often goes through it by default.If the headphones are lying in your bag, you may not hear the message.
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Verifying special features and Bluetooth connections is an important diagnostic step that users often miss.
Problems with energy saving and background work
MIUI's aggressive energy-saving policy is the main enemy of timely notifications. If WhatsApp is put to sleep, the app won't be able to make sound at the right time, it will wake up when you open it and show accumulated messages, but it won't sound anymore.
To fix this, press the app icon on your desktop and select About. Find Activity Control or Battery Savings. Select No Limits. This will allow the app to run in the background all the time.
You also need to fix the app in the list of running processes, open the menu of running applications (swipe from the bottom up and hold), find WhatsApp and pull it down to make the lock icon appear, which will prevent the application from being cleared from RAM.
- 🔋 No restrictions: Allows full background work.
- 🔒 Blocking in memory: protects against closure by cleaning.
- ⚡ Auto Start: Allows start with the system (optional).
Performing these steps ensures that the application process is active and ready to play the audio file at any second, without this step, even the correct volume settings may not work.