Smartphone owners Xiaomi often face the need to fine-tune sound profiles so that the device does not distract from work or rest at the wrong time. The model Redmi 9working on the shell MIUIoffers flexible audio management tools, but understanding them the first time can be difficult due to the abundance of menus. Turning off annoying messenger alerts or system signals requires understanding the hierarchy of sound settings in the ecosystem. Incorrect configuration may cause you to miss an important call, but the phone will make noise when receiving advertising mailings. In this article we will analyze in detail all the available methods: from global muting to fine-tuning each installed application. You'll learn how to manage Do Not Disturb modes and set up automatic profiles so that your Android.
An incorrect configuration may cause you to miss an important call, but the phone will make noise when receiving promotional mailings. In this article we will analyze in detail all the available methods: from global muting to fine-tuning each installed application. You'll learn how to manage Do Not Disturb modes and set up automatic profiles so that your Redmi 9 behaves exactly the way you want.
Before making any deep changes to the system, it's worth noting that the interface MIUI may vary slightly depending on the firmware version. However, the basic principles of working with audio streams remain the same for all devices in the line Redmi. We will look at both standard methods through settings and more advanced ways to manage notifications.
Quick settings through the control panel
The fastest way to change the sound mode is to use the quick access panel. Swipe down from the top edge of the screen to expand the notification shade. Here you will see a series of icons, among which is the sound mode switch. Pressing this button cyclically changes the state of the device: ringing mode, vibration and complete silence.
For more detailed control, hold your finger on the sound icon or find the volume slider. In the menu that appears, you can separately adjust the levels for media, calls and notifications. This allows, for example, to leave the volume for music high, but completely mute the sound of system messages. This approach is convenient when you need to quickly adapt the phone to the current situation.
Pay attention to the bell icon in this menu. If it is crossed out, then all sounds are disabled. In some versions MIUI a long press on the volume slider opens an expanded menu where you can activate Do Not Disturb mode with additional options for filtering incoming signals.
Use the physical volume buttons on the side of the case for quick adjustments. Tap one of them, then tap the gear icon on the screen to get to advanced sound settings without searching the menu.
Global mute of sounds in system settings
If you need a permanent configuration rather than a one-time change, you should refer to the main settings menu. Go to section Settings → Sound and vibration. All the main levers for controlling the audio streams of your Redmi 9are concentrated here. This section allows you to set the default behavior of the phone during various events.
In the “Notification sound” item, you can select a melody or set the value to “None”. This action will disable the standard signal for all events that do not have individual settings. There is also a “Lock sound” switch here, which is responsible for audio accompaniment when turning the screen on and off. Disabling these options makes using your smartphone more invisible to others.
Don't forget to check your vibration settings. Often, users turn off the sound, but forget about tactile feedback, which can be just as intrusive in a quiet environment. The menu Sound and vibration has separate sliders for vibration when calling and vibration in Silent mode. Disabling these settings completely guarantees absolute silence.
⚠️ Note: Mute notification sounds in global settings does not always affect third-party applications such as WhatsApp or Telegram. They can use their own sound files that ignore system settings.
Fine-tuning notifications for specific applications
The most effective method of dealing with noise is individual settings for each application. Modern versions Android i MIUI allow you to manage notification channels separately. Go to Settings → Notifications and status bar → Application notifications. In the list that opens, find the desired app, for example, a social network or a game.
Inside the menu of a specific application, you will see the “Allow notifications” switch. If you turn it off, the app will stop sending any signals. However, a more flexible approach is to click on the app name and select Notification Categories. Here you can turn off the sound only for certain types of events, leaving visual notifications active.
For some apps, you can select the severity of the notification. By setting the “Mute” option, you will allow the application to show banners in the curtain, but will not allow you to play audio signals. This is the perfect balance for those who want to see messages, but do not want to hear constant beeps throughout the day.
☑️ Audit noisy applications
It is worth remembering that updating the application may reset some user channel settings. Therefore, periodically checking this section is useful to maintain the desired level of silence. This is especially true for frequently updated instant messengers and news aggregators.
Using Do Not Disturb mode and schedules
Do Not Disturb (DND) mode is a powerful tool for scheduling silence. Unlike simply muting the sound, this mode allows you to create a “white list” of contacts, calls from which will go through even in silence. You can activate it through the control panel or in the section Settings → Sound and vibration → Do not disturb.
One of the most useful functions is the ability to set a schedule. You can specify a time, for example from 23:00 to 07:00, when the phone will automatically switch to silent mode. This eliminates the need to manually change settings every night before bed. The system itself will silence all unnecessary sounds within a specified period of time.
In the mode settings, you can detail the blocking rules. Options are available to hide visual notifications on the lock screen, prevent vibration, and limit recurring calls. The Repeat Calls feature skips a call if the same caller calls a second time within three minutes, which can be critical in emergency situations.
⚠️ Attention: When Do Not Disturb mode is activated, alarms generally continue to work. However, third-party alarm apps may be blocked, so check their functionality in advance.
What happens to games in DND mode?
Do not disturb mode usually does not automatically mute game sounds and music because they are considered media content and not notifications. For complete silence in games, you need to reduce the media volume separately.
Setting quiet hours and automating scripts
The shell MIUI offers the “Quiet Hours” function, which is closely integrated with the “Do Not Disturb” mode. It allows you to automatically turn on silent mode at a specified time. Go to Settings → Accessibility → Quiet hoursto configure this setting. Here you can select days of the week and time intervals.
In addition to the time frame, you can configure the reaction to events. For example, your phone can automatically turn on silent mode when you connect to your home Wi-Fi network or when the battery drains below a certain level. Such automation makes using a smartphone more comfortable and predictable.
For advanced users, integration with the Scripts application (if installed) or use of built-in automation tools is available. This allows you to create complex chains of actions: when a certain time comes, the phone not only goes silent, but also reduces the screen brightness, turns off the mobile data and changes the wallpaper.
| Setting type | Impact on sound | Impact on vibration | Visual notifications |
|---|---|---|---|
| Volume slider (min) | Full mute | Depends on settings | Active |
| Silent mode | All disabled | Disabled | Active |
| Vibration mode | All disabled | Active | Active |
| Do Not Disturb | Filtered by rules | Filtered by rules | Hidden (optional) |
Automation through a schedule is the best way to forget about manual sound settings. Set up the quiet hours once, and the phone will automatically switch to the desired mode every night.
Solving problems with persistent sounds and bugs
Sometimes users are faced with a situation where the notification sound does not turn off even after all the settings. This may be due to the operation of specific system services or errors in the firmware Redmi 9. First of all, check the “Security” application and the “Permissions” section, where some apps may take precedence over system settings.
It is also worth paying attention to the “Notifications of important events” function. In some versions MIUI there is a separate channel for critical system messages, which is difficult to disable using standard methods. Try resetting application settings through the menu Settings → Applications → All applications → Three dots (top right) → Reset application settings.
If the problem persists, a third-party application that is taking over sound control may be to blame. Try booting your phone into safe mode. To do this, hold down the power button, and then long-press the “Power off” icon on the screen until you are prompted to reboot into safe mode. If the sound turns off correctly in this mode, the problem is in one of the applications you installed.
⚠️ Attention: Resetting application settings will not delete your personal data, but will return all resolutions and sound settings for apps to factory settings. You will have to re-configure notifications for instant messengers.
How to find hidden system sounds?
Some system sounds, for example, charging or USB connection, are controlled through the engineering menu or special codes, but it is better for the average user not to go there unless necessary, so as not to disrupt the operation of the system.
Frequently asked questions questions
How to mute the sound for only one contact, but leave it on for the rest?
Open the Contacts application, select the desired subscriber and click “Edit”. In the contact settings menu, find the “Melody” or “Notification Sound” option and set it to “Mute.” This will only apply to the selected person.
Why does the phone make a sound when charging is connected, although notifications are turned off?
The power connection sound refers to system interface sounds, not application notifications. To disable it, go to Settings → Sound and vibration and find the "Lock sound" or "System sounds" switch, then deactivate it.
Is it possible to make the phone vibrate but not sound?
Yes, to do this, just switch the phone to "Vibrate" mode through the control panel or adjust the volume sliders so that the notification volume is at zero and vibration is turned on in the corresponding settings menu.
Are the sound settings reset after rebooting the Redmi 9?
No, all changes made to the sound settings are reset. Do Not Disturb modes and application settings are saved permanently. They are not reset when you normally reboot the device, unless you perform a full factory reset.
How to turn off the keyboard click sound on Redmi 9?
The keyboard sound is configured separately. Go to Settings → Advanced settings → Language and input. Select your keyboard (for example, Gboard or Mi Keyboard), go to “Settings” and turn off the “Sound when pressing keys” option.