How to change the charging sound on Xiaomi Redmi 9: The complete guide

Xiaomi smartphone owners often face the desire to personalize their device, making it unique and easy to use. One of the most sought-after changes is to replace the standard system sound that is heard when you connect the power cable. The standard melody can seem too loud, annoying or simply boring after prolonged use of the gadget. In the case of the Redmi 9 model, running on the shell of MIUI, this process has its own nuances that distinguish it from setting ringtones for calls.

Changing the charging sound on Xiaomi Redmi 9 doesn’t require superuser rights or complex system reflashing. Modern versions of MIUI allow you to flexibly customize the audio of system events, although hidden settings sometimes require a careful approach. In this article, we will discuss in detail all the available ways, from using built-in themes to applying specialized applications and manually replacing files. You will learn how to avoid common errors and why the standard method may not work in your particular case.

Before making any changes, it’s important to understand that the sound profile of the system is closely related to the visual design you choose. Often users try to change the sound through the standard audio settings menu, unaware that in the Xiaomi ecosystem, these settings are strictly tied to an active theme. We’ll look at how to circumvent this limitation and install any audio file from your memory. We’ll also focus on file formats that Redmi 9 supports so you don’t waste time converting inappropriate tracks.

Features of the MIUI sound system on Redmi 9

The MIUI shell installed on Redmi 9 has a unique multimedia management architecture that is significantly different from pure Android. Here, the charging sound is not a separate system file that can be simply replaced in the root folder without consequences. The system dynamically loads audio resources from the active theme package. This means that trying to change the audio settings without considering the themes can lead to everything returning to its original state after rebooting or changing the design. Understanding this logic is the key to successful customization.

Xiaomi has also implemented strict restrictions on access to system files in the newer versions of Android that run Redmi 9. This is done for security reasons so that attackers cannot introduce malicious code through the replacement of system sounds. Therefore, methods that worked on older versions of firmware may not be effective. However, there is a workaround through the theme menu that remains workable and safe for the average user.

⚠️ Warning: Before making any changes to system files or installing third-party audio management applications, be sure to back up important data.While the methods described are safe, human error or app failure can lead to unforeseen results.

Importantly, the audio codecs used by the system also play a role. Redmi 9 does a great job with MP3 and M4A formats, but for system sounds it is better to use small files and bitrate. Too long or heavy tracks can be cropped by the system or played with a delay. The optimal charging sound duration is from 2 to 5 seconds, which ensures an instant reaction of the device without undue load on the processor.

Preparation of audio file: formats and requirements

The first step to personalization is to find or create the right audio file, and not every music track is suitable for use as a charging signal. MIUI on the Redmi 9 It works most correctly with file formats. MP3. Although other codecs are supported, the use of MP3 ensures compatibility and no playback errors.The file must be stored in the device memory, preferably in the root or in the Music folder or MIUI/sound_all, make it easier to find.

Sound quality also matters. There's no point in using a high-resolution Hi-Res file for short system notification. This will only take up extra space and can cause micro-latency when triggered. It's recommended to use files with a bitrate of 128 kbps or 192 kbps. If you create the sound yourself from your favorite song, be sure to cut the extra silence at the beginning and end of the track. The system can perceive silence as part of the signal, and the charging sound will be heard after the actual cable connection.

You can use both online services and special apps on your smartphone to edit audio. There are many free editors that allow you to cut the desired piece and save it in the correct format. Once you create a file, give it a clear name, for example, give it a clear name, charge_sound.mp3, This is especially true if you plan to change sounds regularly.

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Use voice recorders or simple audio editors on Android to quickly record or cut the desired piece of sound directly on your phone without using your computer.

Method 1: Using the Themes app to change sound

The safest and most officially supported way to change the charging sound on Xiaomi Redmi 9 is to use the built-in Themes app. This is where resource packs are stored, including audio files for system events. You don't have to search for hidden menus or use USB debugging. Just open the Themes app on the home screen or in the tool folder. Note that the interface may vary slightly from region to region, but the logic remains the same.

In the Topic app, go to Profile (the person icon in the corner) and select My Themes, and here you will see a list of all the designs installed and downloaded. However, we are not interested in changing the whole theme, but in accessing sounds. MIUI There's a separate tab called Sounds or editing a current topic, and if there's no direct replacement, we use a trick: we find a topic that says it has a topic_custom_sounds, or download a theme stub that allows you to reassign system sounds.

The algorithm of actions through the standard menu often looks like this:

• 🎵 Open the Topics app and go to the Sounds section (if available in your area).
• 🔍 Search for “Charge” or “Charge” to find sound packets.
• ⬇️ Download your favorite package and use it by selecting the option "Apply only sound".
• ⚙️ If you don’t have ready-made options, use the Create Theme feature to add your file as system sound.

It is worth noting that in some regions (e.g. Russia or Europe), the functionality of the Theme app can be reduced compared to the Chinese version. If you do not find the right options, try changing the region in the phone settings (Settings → Additional settings → Region) to India or Indonesia. This often unlocks full access to the theme and sounds store. Once set up, you can return the region back, but the audio packages will remain available.

Method 2: Install sounds through third-party applications

If standard MIUI methods seem too complex or limited, specialized applications from the Google Play Store come to the rescue. There are many utilities created specifically for managing system sounds on Android. One of the most popular and proven programs is ZRingtone or Volume & Sound Notification, which have the rights to change system audio settings without having to obtain root rights using standard Android resolutions.

The process of installing sound through such an application on Redmi 9 is usually as follows: After installation and launch, the program will request permission to access files and control sound. Accept the requests. Then, in the application interface, you need to select the Charging category. The application will suggest selecting a file from the device memory. Navigating the file system in such programs is usually convenient and allows you to quickly find your prepared mp3 file.

The advantage of using third-party applications is their flexibility: they allow you not only to change the sound, but also to adjust the volume of the sound regardless of the overall volume of the media or call. Some programs also allow you to set different sounds for different scenarios, for example, quiet sound at night and loud during the day, although this is less common for the charging function, the main thing is to carefully look at the permissions that the application requests, and download only proven high-rated software.

It's important to understand that after you upgrade your MIUI system or reset your settings, third-party applications may lose their rights to change the system sounds, so you just have to reopen the application and reapply the sound, which is not a bug, but a feature of Android security, which resets custom modifications when critical configuration changes.

Manual System File Replacement (for Advanced Users)

For those who are not afraid to work with the file system and want to gain full control of Redmi 9, there is a method of manually replacing the system sound file. This method requires a file manager with access to the system partition, such as MT Manager or Root Explorer. However, starting with Android 10 and above, access to the /system/media/audio/ui folder is limited even for root users without unlocking the bootloader and reflashing with disabled verification.

If you have access to the system, you need to find the file that handles the charging sound, which is usually called charging.ogg or PowerOn.ogg depending on the firmware version. The actual file name may vary depending on the specific build. MIUI, Before replacing the original file, it is better to rename the file (for example, in the charging_backup.ogg), Replace it with your file, renaming your track in the exact name of the system file.

If the sound has not changed or the phone has gone into a cyclic bootloop, this means that the file has been damaged or not fit into the format, in which case downloading to Recovery mode and resetting to factory settings (if recovery from the backup did not help), which is why this method is considered risky for inexperienced users.

⚠️ Note: Manual file replacement in the system folder /system/ This can cause system failure, loss of warranty and inability to boot your phone, and only do so if you understand the risks and have an up-to-date data backup.

Removal: Why doesn’t the sound change?

Often, users are faced with a situation where all actions are done correctly, the file is loaded, but when you connect the cable, you hear a standard sound or silence. One of the most common reasons on Redmi 9 is the Do Not Disturb or Silent Mode. In some MIUI configurations, system sounds, including charging, are muted or turned off in these modes. Check the sound settings and make sure the system effects sliders are active.

Another reason may be in the file format. Even if the.mp3 extension, there may be an unsupported codec encoded inside. Try converting the file to a different bitrate or using the.ogg format, which is native to Android. Also, the problem may be the file length: if the track is longer than 5-7 seconds, the system may simply ignore it as a system signal.

Sometimes cleaning the app cache of Themes or Sounds helps. Go to Settings → Apps → All apps, find the appropriate app and select Clear Cache. After that, restart the phone and try to re-apply the sound. This helps to eliminate software conflicts that arose after the system update.

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If the sound is unchanged, 90% of the time the problem is in file format (use MP3 128kbps) or that the Do Not Disturb mode is active.

Optimization and additional sound settings

After successfully setting up your desired charging sound, you should pay attention to the overall optimization of your Redmi 9 audio system. In the Sound Enhancer settings, you can find an equalizer and presets for different music genres. While this does not directly affect the charging sound, the right equalizer setting can make the system sounds more enjoyable and legible, especially if you use headphones.

Also worth mentioning is the Dolby Atmos feature, which is present in some firmware versions for Redmi 9. Enabling this mode can change the sound of system notifications, making them more voluminous. Experiment with these settings to find a balance between sound quality and battery consumption, as complex audio processing can consume additional energy.

Remember that smartphone personalization is a creative process, and you can create different sound profiles for different situations: one for work (strict and quiet), another for home (fun and loud), and by changing the whole theme, you can automatically switch the audio, which is very convenient.

⚠️ Note: Avoid using audio files from DRM-protection (from paid subscriptions of music services), as the system will not be able to reproduce them as a system signal.