Smartphone owners often face the need to preserve important details of business negotiations or courier arrangements. Xiaomi Redmi 9, which is powered by the MIUI shell, offers flexible tools to capture real-time audio, but users often get lost in the variety of settings, not knowing exactly where the feature is hiding or why recording doesn’t start automatically.
Modern versions of the Android operating system and Xiaomi firmware have undergone a number of changes in privacy issues, which directly affected the functionality of the voice recorder in the phone. In this article, we will analyze in detail the regular capabilities of your gadget, consider the subtleties of activating hidden options and analyze alternative methods if standard software has ceased to meet your needs.
Before we get into the settings, it's worth noting that the quality of the final file depends on the method of encoding and the source of the sound. Redmi 9 uses microphone recording by default, but when you connect the headset, the source can automatically switch, and understanding these nuances will help you avoid situations where instead of the voice of the interlocutor, you hear only silence or interference.
Activation of the built-in call recording function
The regular phone in MIUI firmware has powerful functionality that often goes unnoticed immediately after you buy it. You don't need to install additional programs to get started, you just need to configure the Phone system app correctly. Open the call menu and look at the three dots in the top right corner of the screen, which is where the settings menu is hidden.
Going to the settings section, look for Call Recording, and you'll see a control panel that allows you to automatically record incoming and outgoing calls, which is especially useful for those who are actively communicating with voice and do not want to manually start the save process every time.
- 📞 Automatic Recording: Allows you to save all incoming calls without your involvement.
- 🔔 Audible alert: plays a voice warning for the interlocutor about the beginning of recording (required by the laws of some countries).
- 📂 The path of preservation: the choice between internal memory and SD-space-saving.
It is important to understand that enabling Automatic Record applies to all numbers unless you have an exception. You can set the rules to keep only contacts from the phone book or, conversely, only unknown numbers. The flexibility of Redmi 9 settings allows you to adapt the phone to any use case.
Set up automatic recording for selected contacts
Storing gigabytes of audio files with weather or spam calls quickly fills up the device’s memory. To avoid this, MIUI offers smart filtering. You can create a list of numbers that will be recorded for all times, ignoring the general settings.
To implement this scenario, go to the contact you want to track. In the subscriber card, find the option menu (usually three dots or the “More” button) and select “Record calls.” After that, all dialogues with this person will be saved regardless of the global privacy settings.
⚠️ Note: If you use Google account contact sync, your individual entry settings may reset when you update sync.
This approach saves processor and storage. Redmi 9 has enough RAM, but the constant background recording of hundreds of files can slow down the file system. Selective approach is the most rational way to use a voice recorder.
☑️ Setting up the electoral record
Location and management of audio files
Once the conversation is over, the file is saved to a special file system section, which can be found through a standard conductor or directly from the call menu, and in the call history, a special icon will appear next to the number that was recorded, a small coil or tape recorder.
By clicking on this icon or selecting Listen in the details of the call, you can play audio. For more advanced file management, such as copying to a computer or sending via a messenger, it is better to use the built-in Explorer application.
The standard path to the entries folder is as follows:
/MIUI/sound_recorder/call_rec/This is the directory that stores all the audio formats, and you can sort them by date, size, or name of the subscriber. SD-map, the path will be similar, but it will begin with the designation of an external drive.
| Parameter | Description | Recommendation |
|---|---|---|
| Format | MP3 or AAC | MP3 is compatible with all players |
| Quality. | Low, Medium, High. | Average is optimal for speech |
| Duration | Depends on the conversation. | There are no limits as long as there is room. |
| File name | Date Time Number | Easy to search. |
Use of third-party applications for recording
In some cases, Xiaomi's regular tools may not work properly or suit the user with their functionality. Then the apps come to the rescue from the Google Play store. One of the most popular solutions is TapeACall or Call Recorder - ACR.
Installing third-party software requires advanced permissions, and the app must access not only the microphone, but also the telephony to determine the beginning and end of the call, and without those permissions, the program will simply record silence.
- 📱 Call Recorder - ACR: Powerful application with cloud synchronization.
- 🎙️ TapeACall: can record calls via conference call (paid).
- 📼 Blackbox Call Recorder: Minimalist interface and easy setup.
Note that the newer versions of Android (10 and above), on which Redmi 9 is based, severely restrict third-party apps from accessing the audio stream during a call. This is done for security reasons. Therefore, many third-party recorders can only record your voice through the microphone, and the voice of the interlocutor will be barely audible or absent.
Why have third-party apps stopped working?
Solution: No sound or quiet recording
One of the most common problems is when a file is created, but when you play it, you hear only your speech or you're silent, and this is often associated with noise reduction, and MIUI algorithms can treat the voice of the interlocutor as background noise and suppress it.
To fix this, try turning off the Noise Canceling Recording feature in the voice recorder settings if this option is available in your firmware version, and the problem may lie in using a protective glass or cover that covers the bottom microphone.
⚠️ Note: When talking through a Bluetooth headset or wired headphones, recording can only be done from one channel.
If you use speakerphone, the recording quality is usually better, because the sound is broadcast through the main speaker and picked up by the microphone. In ear-to-ear mode, the sound is transmitted directly to the hearing aid, and it is harder for the microphone to "catch" it without loss.
💡
For maximum recording quality in complex acoustic conditions, turn on speaker while talking, which will allow the microphone to capture the voice of the interlocutor through the speaker, which will ensure the recording of both sides of the dialogue.
Legal aspects and confidentiality
Recording telephone conversations is a subject of law, and in most cases, recording the conversation you are participating in is permitted for personal use, but it may be illegal to publish such recordings or use them as evidence in court without warning the person involved.
The voice alert feature built into Redmi 9 is designed to comply with these regulations, informing the other party that the conversation is being recorded, and ignoring this rule could lead to legal consequences in a number of jurisdictions.
Always remember the right to privacy, and even if you can technically record any conversation, the ethical side of the matter is on your conscience: use the data responsibly and do not share it with third parties without the consent of the participants.
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MIUI staffing provides the best recording quality and stability compared to third-party applications, thanks to direct access to system telephony resources.