Owners of modern smartphones Xiaomi, Redmi and POCO often face a situation where built-in sound processing algorithms are too aggressive. Instead of clearing the voice from the background hum, the system can “crush” the speech itself, making the interlocutor indistinct or creating an “aquarium effect.” This problem is especially acute when recording videos in windy weather or during calls from high-traffic areas. Understanding how to turn off the noise emitter on Xiaomi becomes a key skill for those who use the gadget for blogging, podcasts or important business negotiations.
It is worth noting that there is no single “Stop Noise Cancelation” button in the global Android settings, as this process is tied to the deep level of the audio codec and software filters MIUI or HyperOS. However, there are proven methods to circumvent these restrictions. They range from simple switches in a standard voice recorder to the use of third-party software and engineering menus. In this article, we will discuss all the available ways to help you get the most pure and natural sound.
Before we start taking any drastic measures, it's important to determine which use case you're concerned about, and the way you process sound when you're recording video, dictating voice messages, and when you're talking to your phone is different. Disabling a function in one app doesn't guarantee that it's deactivated in system calls, so we'll look at each situation separately so you can customize the device to your needs.
Causes of aggressive noise reduction
ANC (Active Noise Cancellation) technology and software-based noise suppression have been introduced to improve communication in a metropolis. Algorithms analyze incoming microphones and try to cut out frequencies typical of wind, transport or crowd hum. The problem is that artificial intelligence does not always correctly recognize a useful signal. Often it perceives a quiet voice or specific timbre of speech as background noise and ruthlessly removes them.
On Xiaomi devices, the situation is exacerbated by the optimization of MIUI, which prioritizes speech intelligibility over naturalness, which causes the sound to become flat and metal when recording video, especially in mid-range models, where the hardware of the microphones does not always cope with software processing. Users often complain that when you turn on the front camera, the sound becomes deaf, as if the phone is in your pocket.
⚠️ Warning: Aggressive noise cancellation can result in loss of important conversation details or sound environments, which is critical for journalistic filming or recording interviews in nature.
Another reason is that multiple microphones work at once. Modern smartphones have 2-4 microphones to implement stereo recording and improve reception. The system automatically mixes signals, and if one of them is closed with a finger or contaminated, algorithms begin to compensate for the loss of data with artificial amplification, which often manifests as an unpleasant whistle or pulsation. Understanding the physics of the process helps to understand why simply turning off a function in settings does not always give the desired result.
Setup of the built-in voice recorder Xiaomi
The standard application "Dictophone" in the shells MIUI and HyperOS has hidden but useful settings to control the recording quality. By default, the system aims at maximum file compression and clearing the voice, but these parameters can be changed. To get to them, open the application and find the menu icon (usually three dots or stripes in the corner), there you are interested in "Sound Quality Settings" or the like.
Inside the menu, you'll find several recording profiles. To minimize the interference of the algorithms, it's recommended to choose "No Compression" or "WAV" mode if available. Some firmware versions have a "Sound Improvement" or "Noise Repression" switch that is active by default. It needs to be put into an inactive state, which is an action that forces the microphone to record the "raw" signal, keeping all the surrounding noises alive, but also making the voice more alive.
☑️ Setting up the recorder
Also worth paying attention to the format of saving. MP3 format involves strong compression and loss of frequencies, which in combination with noise maker gives the worst result. Switching to WAV or AAC (high bit rate) allows you to save more details. If your goal is to further processing sound on the computer, then writing in high quality without built-in processing is the only right solution. Remember that files without compression take up much more space in the memory of the device.
Video sound management
Video recording is the scenario where the noise maker is most annoying. Xiaomi's standard Camera app often ignores the external audio settings while working on its own algorithms. However, in professional shooting modes, the situation is different. By switching to Pro or Video Pro mode, you get access to manual control of audio parameters. Here you can turn off automatic adjustment (AGC) and reduce the sensitivity of the microphone, which indirectly reduces the need for the system to turn on noise cancellation.
If the camera's built-in tools fail to achieve what they want, third-party apps from Google Play come to the rescue. Programs like Open Camera or Filmic Pro (paid) allow you to fully control the audio stream. In the Open Camera settings, you need to go to the "Video Settings" section and find the "Sound Source" option. Choosing the "External microphone (if any)" or "Microphone (no processing)" often allows you to bypass the system filters of MIUI. This gives a clean sound, albeit with all the noise of the surroundings.
So before you take an important shot, make sure you test it in different light and noise conditions, check if there's a background buzz or crackle that was previously masked by noise, and clean sound requires more careful preparation of the location for the shot.
Why is it that 4K sound is worse?
Third-party applications for recording calls and voices
When it comes to phone calls, the audio path is made more difficult by the modem and system drivers that are restricted. The standard MIUI Dialer (or Google Phone, depending on the region) has no noise reduction settings for the user. The only legal way to influence the process is by using third-party recorder apps that can intercept the audio stream before or after processing by the system, but with the ability to use their own filters.
Applications like Cube ACR or Call Recorder often have their own gain and filter settings. While they can't completely turn off the modem's hardware noise maker, they can override the source of sound. In those settings, try changing "Audio Source" from "Default" to "Voice Communication" or "Microphone." In an experimental way, you can find an option where the app will ignore the system prompts to clean the voice.
- 📱 Cube ACR: Allows you to choose a specific sound source and has amplification settings, which helps to "smash" a quiet, suppressed noise-muffling voice.
- 🎙️ RecForge II: Professional recorder that supports manual adjustment of microphone gain and disabling Android software effects.
- 🔊 Lesser AudioSwitch: A utility that allows you to force the switch of the input / output device, ignoring standard use cases.
Using third-party call recording software requires broad permissions. Be careful when installing and choose reputable apps to avoid passing on your conversations to third parties. Also, on Android 10 and above, the ability to record calls for third-party apps is severely limited by Google’s security policies, so functionality can be unstable.
Use of Engineering Menu and ADB
For advanced users who are not afraid of complex manipulations, there is the possibility of interfering with the audio subsystem through debugging commands, which is the most effective, but also the most risky method. It requires connecting a smartphone to a computer and installing the ADB platform (Android Debug Bridge). Before starting any actions, be sure to create a full backup of data, as an error in the commands can lead to the failure of the audio tract.
The method is to send commands through the ADB shell to change the parameters of the audio effects. Commands can vary depending on the processor (Snapdragon or MediaTek) and the version of Android. For example, for some devices based on Snapdragon, disable the effects through commands:
adb shell settings put global audio_effects_enabled 0However, this command does not work on all firmware. You can find more in-depth configuration via an engineering menu, which is logged in through a set of special code in the "caller" (for example, ##6484## or ##3646633##). In the Audio -> Audio Debug section, you can find the parameters Noise Reduction or Acoustic Echo Canceller. Changing the values from 1 to 0, you theoretically turn off the function. But be careful: in new versions of MIUI, access to these fields is often blocked or changes are not saved after a reboot.
⚠️ Warning: Changing the settings in the engineering menu can lead to the complete disappearance of the sound or the appearance of a constant squeak.
An alternative to manual commands is to use specialized root-right terminal applications, such as Termux in conjunction with Magisk modules. There are modules, such as "Disable Noise Suppression", that patch libaudioeffect.so's system libraries, forcibly disabling processing, which requires unlocking the bootloader, which will officially disable the device's warranty, although it is reflashed by flashing.
Hardware solutions and external microphones
The most reliable way to get around the software limitations of a smartphone is to use external hardware. Connecting an external microphone through a 3.5 mm connector (if any) or via USB-C often causes the Android system to switch to another audio profile where the noise maker works softer or is turned off altogether. Modern models without a minijack will require quality adapters (DAC) with support for microphone input.
Loop microphones like Boya BY-M1 or more advanced wireless systems like DJI Mic and Rode Wireless Go connect directly and transmit the signal already processed, in which case Xiaomi's built-in algorithms get ready, clean sound and stop trying to "improve" it. This is a professional approach that guarantees stable results regardless of firmware updates or phone models.
| Type of solution | Efficiency | Difficulty | Impact on the guarantee |
|---|---|---|---|
| Settings of the recorder | Low/Mediocre | Minimum | No. |
| Third-party annexes (Camera/Sound) | Medium | Low. | No. |
| ADB and Engineering Menu | Tall. | Tall. | Risk (in case of error) |
| External microphone | Maximum | Medium (buying) | No. |
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When using an external microphone via a USB-C adapter, cover the hole of the built-in microphone on the end of the phone with your finger so that the system does not try to mix sound from two sources at once.
And don't forget the simple physical techniques, sometimes just keeping your palms on the main microphone area (usually at the bottom of the body) during a conversation, a common phenomenon where users block the microphone in horizontal play or video, causing the phone to convulsively increase sensitivity and turn on maximum noise, creating a "scuba diving" effect.