Personalizing your smartphone is the first step to making your device your own. The owner of the Xiaomi Redmi Note 9 Pro often faces the desire to replace the standard, familiar alarm sound with a unique composition. It’s not just a matter of aesthetics, but also a practical necessity: in a noisy place or when meeting friends, it is much easier to recognize your phone by its characteristic sound than constantly checking the screen.
With MIUI, which is installed on the Redmi Note 9 Pro, the ringtone change process is flexible, although it has its own characteristics compared to “pure” Android. You can set a separate melody for an incoming call, message, alarm clock, or even assign a unique sound for a specific contact from the phone book. Understanding the logic of the MIUI sound engine will allow you to manage the audio of your gadget as efficiently as possible.
In this article, we will discuss in detail all available ways to replace audio files. We will look at both standard methods through the settings menu, and more advanced options using third-party file managers. We will also pay attention to possible problems that users face, for example, when the system does not see the downloaded track or the volume of the call remains low even at maximum.
Preparation of audio files and format requirements
Before you start setting up, you need to make sure that your music files meet the technical requirements of the system. Redmi Note 9 Pro works perfectly with popular formats, but for stable operation it is better to use universal coding standards. The best choice is MP3 format with a bitrate from 128 kbit / s to 320 kbit / s, which ensures good sound quality without undue load on the processor during playback.
It is also important to consider the length of the track. If you plan to use the track as a standard ringtone for all incoming, it is better to choose a fragment lasting from 15 to 30 seconds. Too long tracks can be cut by the system or sound incorrect if the call comes again before the first melody is played.
⚠️ Note: Do not use protected audio files DRM (These files will not be played as system sound, as they are tied to a particular application and account.
Files should be stored in the phone's memory, not just in cloud storage, if you want to avoid delays when calling, Ringtones_Custom, The folder structure will help the system index new sounds faster and display them in the list of available sounds.
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Use online services or editorial apps to cut the song down to the right snippet before downloading to your phone, eliminating the need to listen to the introduction every time you call.
Classic method of installation through sound settings
The easiest and most reliable method of replacing a tune is to use the built-in MIUI interface. This method does not require installing additional software and ensures that the system correctly applies the changes. First, unlock the screen of your Redmi Note 9 Pro and find the Settings icon application, which usually looks like a gear.
In the settings menu, scroll down to the Sound and Vibration section. This is where all the main audio settings of the device are concentrated. You will see the "Bell Melody", "Notification Sound" and "Alarm Sound" items. By clicking on "Bell Melody", you will be placed in the list of preset songs, and you will see the "Select a Melody from Files" button or the plus icon depending on the firmware version.
- 🎵 Click on the "Call Melody" item to select the main ringtone.
- 📂 Use the built-in audio player to listen to the track before installing.
- ✅ Confirm the choice with the “OK” button or check in the corner of the screen.
If the file is not listed, the system will suggest selecting it through the file manager, in which case the navigation may vary slightly depending on the design topic, but the logic remains the same: go to the folder where your track is located and select it. After applying the changes, the phone immediately loses the selected fragment for verification.
☑️ Checking the ringtone installation
Using the theme of design to change sounds
A unique feature of Xiaomi’s shell is the deep integration of sound profiles with the themes of the design. Often users do not know that by installing a new theme from the MIUI Themes store, they can automatically receive a set of new ringtones, notifications and even lock sounds created specifically for the visual style.
To use this method, open the Themes app on your desktop. Type in a keyword or select the Sound category. You can find both free and paid packages here. The advantage of this approach is that sounds are often already optimized for length and volume, and have smooth fade-out, which makes the call more pleasing to the ear.
When you install a theme, the system will ask you which components you want to use. You can only choose Ringtones or System Sounds, leaving the wallpaper and icons unchanged. This allows you to combine the visual style of one theme with the audio sequence of another, creating a fully customized experience using the Redmi Note 9 Pro.
Where are the sounds of them stored?
Customization of individual melodies for contacts
One of the most useful features for productivity is the ability to assign a unique tune to a particular subscriber, which allows you to know who is calling without looking at the screen, even if the phone is in your pocket or in another room. On the Xiaomi Redmi Note 9 Pro, this is done through the Contacts or Phone app.
Open the contact list and find the person you want. Click on their name to go to the subscriber card. At the top of the screen or in the menu (three dots in the corner), select the "Set a ringtone" option. It opens a standard audio selection menu similar to the one used for a general call. You can select a track from the list or download a file from memory.
It is worth noting that if a contact is linked to a Google or Mi Account, the setting can be synchronized between devices, but local files (your mp3) are synced only if the appropriate cloud settings are available. For calls via messengers (WhatsApp, Telegram, Viber), this setting does not work – there the sounds are configured inside the applications themselves.
| Type of setup | Where applicable | Priority |
|---|---|---|
| Common ringtone | All incoming calls | Low (redefined by contact) |
| Contact ringtone | Only the number selected | High-pitched |
| Do Not Disturb mode | Blocks all sounds | Highest. |
| Simulation of a memory card | Affects the reading of files | Systemic |
Installation of sound through file manager
Sometimes the standard menu doesn’t display all files, especially if they’re in deep folder structure or have custom tags, and in these cases, direct access through a file manager, such as Xiaomi’s built-in Explorer or a third-party File Manager+, comes to the rescue.
Find the downloaded audiophile in the Downloads or Music folder. Click on the file and hold your finger until the context menu appears. Select "More" (or three dots) and find the "Install as a ringtone" option. The system will transfer the file to the desired system directory and apply it.
The alternative is to copy the file to the ringtones system folder, and you have to go to the root of the internal memory and find the MIUI -> sound -> ringtone folder, and if you copy your file, you'll see it in the general list of tunes in the sound settings as a system, but it requires care not to disrupt the system files.
⚠️ Note: When working with system folders, make sure you copy the file rather than moving the original. Deleting system files can cause sound settings to be reset to factory facilities.
Solution: If the melody doesn't work or is quiet
Redmi Note 9 Pro users may find themselves in a situation where the file is not playing after installation, or the volume seems to be insufficient. Often the problem lies in the media volume settings, not the bell. In MIUI, these parameters are separated: make sure that the Sound slider (the bell icon) is twisted to the maximum, not just Media.
Another common reason is the file format. Some codecs may not be supported by the system call player, although they open in a music player. Try converting the file to a classic MP3 with a sampling rate of 44.1 kHz. Also check whether Quiet or On-Air mode is on, which blocks audio signals.
If the sound is interrupted or wheezing, it is possible that the file is corrupted or of too high quality (e.g., Lossless FLAC) that the processor does not have time to decode at the time of the incoming call, in which case using a smaller converted version will solve the problem.
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System volume and media volume are different settings. Always check the sound level of the call in the side menu.