Phone records on Xiaomi smartphones (including Redmi and POCO models) are automatically saved in.m4a or.amr format β and you canβt always get the right length right away. You may need to cut an important piece of dialogue for proof, shorten the lengthy interview, or simply remove unnecessary pauses. In this article, weβll look at all the current ways of cropping, from built-in MIUI tools to professional audio editors, and also explain how to avoid loss of sound quality.
The peculiarity of Xiaomi phones is that they do not always offer built-in cropping function directly in the Dictophone or Call Records app. Depending on the MIUI version (12-14) and the device model (for example, Redmi Note 12 Pro+ vs POCO X5), the interface may differ. We tested all methods on current firmware in 2026 and identified those that work consistently even on budget models with limited resources.
Pruning through the standard Dictator app (MIUI 14 and later)
Since MIUI 14, the companyβs Dictophone app (com.miui.soundrecorder) has introduced a basic audio editor that is suitable for quick cropping without installing third-party programs, but has limitations: you can not impose effects or change the playback speed.
To cut the record:
- Open the Dictophone app (the microphone icon on your desktop).
- Find the right entry in the list and tap it.
- In the lower right corner, click on the Edit icon (scissors).
- Drag sliders on the timeline to highlight the fragment for preservation.
- Click Save as a New File β the original will remain intact.
Important: In MIUI 13 and older, the editor may not be available, in which case, use the methods in the following sections.
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If your Dictator doesn't have a cropping feature, update the app via Google Play or App Gallery. Sometimes updates come separately from the firmware.
2.Use of the Call Recorder application
On some Xiaomi models (such as the Redmi Note 11 Pro or Xiaomi 13T), call records are not saved in the Dictator, but in a separate Call Records app (com.android.callrecorder).
- π± The cropping function is only available for.amr recordings (not working with the.amr format.m4a).
- π Sound quality after pruning may deteriorate due to recoding.
- β±οΈ Maximum length of fragment - 10 minutes (limitation) MIUI).
Instructions:
- Open the Call Records (Waves pipe icon).
- Select a post and click on the three dots in the top corner β βEditβ.
- Set the starting and ending points of the pruning.
- Save the file under a new name (the original is not changed).
What if the record does not open in the editor?
Third-party cropping apps (TOP-3 for Xiaomi)
If the built-in tools don't work, install one of the apps we've tested, and we've selected the ones that are optimized for Xiaomi and don't overload the system:
| Annex | Formats | Features | Cons |
|---|---|---|---|
| Lexis Audio Editor | MP3, M4A, AMR, WAV | Support for batch processing, sound normalization | Advertising in the free version |
| MP3 Cutter | MP3, AAC, FLAC | Simple interface, real-time preview | No AMR support without conversion |
| WaveEditor | WAV, MP3, OGG | Multi-track editor, effects | Difficult for beginners |
Recommendation: Lexis Audio Editor is best suited for call recordings β it works correctly with.amr files, which are often used in Xiaomi to save space. Install it from Google Play or APKMirror (if your model is without Google services).
Pruning on a computer (for precise processing)
If you want to cut a fragment to within a millisecond or apply effects (for example, remove noise), it is better to transfer the recording to the PC.
- Connect Xiaomi to your computer via USB (select File Transfer Mode).
- Copy the entry from the folder: Internal Storage β MIUI β sound_recorder Or internal storage. β CallRecorder
- Open the file in one of the programs: ποΈ Audacity (free, supports plugins) πΏ Adobe Audition (Professional Tool) π§ Ocenaudio (light, no installation)
Tip for Audacity: To maintain quality, export a file in either WAV (PCM) or MP3 (320 kbps) format. Avoid AMR format when resaving - it compresses sound strongly.
Copy the original file to the cloud (backup)
Check the format of the record (convert if necessary)
Install codecs (e.g. K-Lite Codec Pack)
Disable automatic normalization in the settings of the program-->
5. Online services for quick pruning
If you don't want to install software, use online editors, which are suitable for one-time tasks, but are not recommended for confidential records (files are uploaded to the server).
- π MP3Cut β supportive MP3, M4A, WAV, is a silence-cutting function.
- π΅ AudioToolkit β you can crop and glue several files.
- β‘ Online Audio Cutter β Works with AMR, but file size limit (50 MB).
Algorithm of action:
- Download the file from your phone (via browser or cloud).
- Select the fragment for pruning (usually by sliders or by indicating the time).
- Download the result and delete the file from the server (if you have such an option).
β οΈ Note: Online services may leave metadata in a file (e.g, IP-address or browser information: If the record contains personal information, use offline methods.
6. Cutting automation (for advanced users)
If you regularly need to trim records in one template (for example, delete the first 10 seconds), you can automate the process using scripts.
- π€ Tasker + AutoTools plugin β creates rules for pruning on a schedule.
- π Python script with pydub library (requires FFmpeg).
- π± MacroDroid is a simplified alternative to Tasker for beginners.
Example of Python script to trim the first 5 seconds:
from pydub import AudioSegment
sound = AudioSegment.from_file ("record.amr," format= "amr")
sound = sound[5000:] # Cut the first 5 seconds (5000 ms)
sound.export("Tracked record.mp3", format="mp3")To run the script on your phone, use the Pydroid 3 or Termux app (set ffmpeg by pkg install ffmpeg).
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Automation is only justified when you process a large number of files regularly, and it is easier to use manual methods for one-time tasks.
7. How to avoid loss of quality when pruning
When cutting audio, it is important to minimize transcoding so that the sound is not degraded.
- π Keep it in the original format (if you cut it). AMR, don't convert into MP3 needlessly).
- π Avoid re-compression β each time you save in MP3 or AMR quality is lost.
- π§ Use high bitrates: 128 kbps is enough for speech, 192-320 kbps for music.
- π Remove the noise before pruning (in Audacity: Effects) β Noise suppression).
If a record is important (for example, for a court), save the original to the cloud (Google Drive, Mi Cloud) and work with a copy. In Xiaomi, you can use the built-in Security β Backup app to do this.
β οΈ Attention: Format AMR, The one used by Xiaomi to record calls is not very good at multiple editing, and after 2-3 saves, artifacts (wheezing, cliffs) may appear. WAV pre-cut.