Modern Xiaomi Redmi Note smartphones feature high-quality microphones, turning the gadget into a full-fledged digital recorder. Users often use the built-in app to record lectures, interviews, musical ideas or important conversations. However, long recordings often contain unnecessary pauses, background noise or unnecessary inputs that require removal.
With MIUI and the new HyperOS, developers have implemented advanced audio editing functionality directly into the standard application, so you don't have to download third-party software to cut a piece, create a ringtone, or split a long track into parts, saving time and space in the device's memory.
In this article, we will discuss in detail the process of cropping audio files on Redmi Note smartphones. We will look at the standard tools, nuances of working with different versions of firmware and alternative methods for those cases where standard functionality is not enough.
Preparation for editing: file search
Before you start modifying, you need to find the file you want in the system. The standard Xiaomi Dictaphone app automatically sorts records by date of creation. Open the program through a menu or search, and you will see a list of all available audio files. If you used different recording modes, they can be divided into tabs.
Sometimes users lose files without knowing where they are stored. By default, the path to audio recordings looks like internal memory. → MIUI → sound_recorder. In this folder, files are often sorted into subcategories: "Call_rec" For calls and for "rec" for regular records, knowing the exact path will come in handy if you decide to use third-party editors.
To get started, just tap the right entry in the app list, and you'll see a player that visualizes the sound wave, and that's where the basic playback controls are located, and make sure that the file is not editable, although Redmi Note has very little system restriction on your files.
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Before you start editing the original recording, it is recommended to make a copy of it, which will protect you from accidental loss of important data in the event of a cropping error.
Use of the built-in editor in the Dictaphone application
In the latest versions of MIUI 12, 13, 14 and HyperOS, the functionality of the regular voice recorder is significantly expanded. When you open the recording, pay attention to the bottom of the screen or the three-dot menu, which often hides the Edit button or the scissor icon, and clicking on it activates editing mode.
The editor interface is a timeline with sliders. The green area usually represents the part that will be saved, and the gray area is the piece that will be removed. You need to move the start and end sliders so that you can highlight the desired area. The accuracy of the selection is regulated by the zoom of the scale, which is available with a swipe or special buttons.
Once a fragment is selected, the system will suggest several actions: save as a new file, replace the original file, or copy the allocated one. To create a ringtone, often use the "Set as a signal" function. If this option is not available, just save the cropped piece as a new file so as not to damage the source.
☑️ The trimming algorithm in the standard application
Alternative method through file manager
If your Dictaphone app doesn't have an edit button, which is what happens on older versions of Android or MIUI, you can use a system file manager. On Xiaomi smartphones, it's called Explorer. Find the audio file through a search or go to the Sound Record folder.
A long press on the file will open the context menu, and some versions of the shell have a "Curse" or "Edit audio" option, which is less accurate than a full-fledged editor, but allows you to quickly cut off the extra. The interface may vary depending on the year of the Redmi Note model.
It is worth noting that the functionality of the built-in conductor depends on the regional version of the firmware. In global builds (Global ROM), the possibilities may be limited compared to the Chinese versions. If the conductor menu does not offer tools for working with sound, you will have to use other methods.
⚠️ Note: When editing through a file manager, always select the option "Save a copy"; directly modifying the original file without backing up can lead to irreversible data loss if the process is interrupted.
Using third-party applications for precision cropping
When built-in tools aren’t enough for professional processing, Google Play apps come to the rescue. Xiaomi Redmi Note is great for lightweight editors like Lexis Audio Editor or MP3 Cutter, which provide more precise control over the sound wave and support various compression formats.
Installing third-party software requires permission to access memory. Once installed, simply open the application, select a file from the list, and use Trim (trimming) or Cut (cutting) tools, which often allow for attenuation effects, which make transitions smoother.
The advantage of specialized applications is that they support high-bitrate WAV and MP3 formats, so you can not only cut, but you can also normalize the volume, remove noise, or change the playback speed, which is especially useful for processing lectures or creating memes.
Table: Comparison of editing methods
To make it easier for you to choose the right way, we compared the main methods on key parameters, the data is relevant for current versions of MIUI and HyperOS.
| Method | Precision of pruning | Effects | Requires installation |
|---|---|---|---|
| Staff Dictaphone | Medium | No. | No (embedded) |
| File manager | Low. | No. | No (embedded) |
| Third-party annexes | Tall. | Yeah (echo, noise) | Yes. |
| Online services | Tall. | Depends on the site. | No (browser needed) |
Why can online editors be inconvenient?
Customize the quality of the record to simplify processing
The quality of the original file directly affects the convenience of its subsequent processing. In the settings of the application Dictaphone on Xiaomi, you can choose the recording format. MP3 format with a bit rate of 128 kbit / s is considered optimal for speech.
If you're planning a major processing, choose the non-compression WAV format, which takes up more space in Redmi Note memory but contains a full spectrum of frequencies, which is important when overlaying effects or pruning accurately, but for simple tasks, this is redundant.
Also worth paying attention to the source of the sound, you can choose the microphone in the settings: main, secondary or headset, using an external headset significantly reduces background noise, which makes it easier to automatically trim the silence in the editors.
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Choosing the WAV format when recording gives you more editing options, but takes up 5-10 times more space in the smartphone’s memory compared to MP3.
Frequent problems and their solution
Xiaomi users sometimes encounter situations where the edit button is inactive.This often happens if the file is write-protected or has an unsupported format. Check file extensions: the standard editor works with.m4a,.mp3 and.wav.
Another common problem is desynchronizing the sound after trimming, so if the audio starts to stutter or lag behind the video (if it was), try converting the file to a standard MP3 before editing, which will fix the codec problems.
In rare cases, an application may close when trying to save a large file, due to a lack of RAM, close background applications before you start working with heavy audio files on Redmi Note.
⚠️ Warning: Do not interrupt the process of saving a cropped file, even if the smartphone is slow.Forced closure of the application at this point is almost guaranteed to lead to file corruption and data loss.