How to disable microphone noise reduction on Android

Many users are faced with a situation where the sound quality during calls or voice recordings leaves much to be desired precisely because of the overly aggressive operation of the algorithms. Built-in active noise cancellation (ANC) systems are designed to filter out background noise, but they often eat up part of the desired signal, making the voice muffled, tinny, or choppy. This problem is especially acute when recording podcasts, holding business conferences, or in conditions where background noise is actually an important context for the conversation.

Unfortunately, there is no single “Disable Noise Canceling” button in the standard Android settings menu, since this function is deeply integrated into audio drivers and depends on the specific device manufacturer. However, there are workarounds, system call settings and special applications that allow you to restore the natural sound of your microphone. In this article we will look at all available methods - from simple switches in the menu to the use of third-party software.

It is worth understanding that the implementation of the audio subsystem is radically different on different smartphone models. What works on Google's pure Google may not be available on shells Android from Google, may not be available on shells MIUI or One UI. Therefore, it is important to sequentially check each of the proposed options in order to find a solution that is suitable specifically for your gadget.

System settings for calls and VoLTE

First of all, you need to check the settings of the “Phone” application itself, since this is where the main voice processing switches are often hidden. Smartphone manufacturers often hide audio enhancement features in sections related to call quality or HD voice. Open the calling application and go to the settings menu, which is usually indicated by three dots in the corner of the screen.

Look for a section called Sounds and vibration or Advanced settings. In some cases, the option may be called HD Voice, VoLTE or “Improving sound quality”. Paradoxically, disabling the function HD Voice sometimes leads to the disabling of aggressive noise filters, returning a more natural, albeit less “studio” sound. This is due to the fact that a high-resolution codec is often paired with a powerful cleaning algorithm.

It is also worth checking your network settings. Go to Settings → Connections → Mobile networks. If you have VoLTE (Voice over LTE) mode enabled, try disabling it temporarily. In 2G and 3G networks, voice processing occurs differently, and noise reduction may work less intensively or completely absent, which will allow the other person to hear background sounds that were previously blocked.

⚠️ Warning: Disabling VoLTE may lead to a decrease in call quality in weak areas reception and increase in connection establishment time. Use this method only to test the quality of the microphone.

If you use third-party calling applications such as WhatsApp, Telegram or Discordtheir internal settings may override the system ones. Go to the settings of a specific messenger and find the “Sound” or “Calls” section. There may be a separate toggle switch for noise suppression, which must be deactivated manually.

Using developer mode

For more advanced users who are ready to experiment with system parameters, there is a hidden “For Developers” menu. This section provides access to debugging functions, including audio stream control. To activate this mode, go to Settings → About phone and press 7 times in a row on the item Build number.

After the notification that you have become a developer appears, return to the main settings menu. A new item will appear at the bottom of the list For developers. Inside this menu, scroll down the list to the Network or Media section. We are interested in the option related to Bluetooth or audio codecs if the problem occurs when using headsets.

However, if we are talking about the built-in microphone, look for settings related to absolute volume level or disabling hardware accelerators. On some devices you can find an item here Disable absolute volume level, changing the state of which sometimes resets incorrect audio processing settings. It is also worth paying attention to the settings Bluetooth Audio Codecif you use wireless headphones - choosing a codec SBC instead of aptX or LDAC can reduce digital signal processing.

Settings → For developers → Network → Disable absolute volume level

Be careful when changing the settings in this section. Incorrect settings may result in unstable Bluetooth connections or no sound at all in some applications. It is recommended to write down the original values ​​before making changes so that you can quickly return everything to how it was.

Third-party applications for controlling the microphone

When system tools are not enough, specialized applications from the store come to the rescue. Google Play. These utilities allow you to intercept an audio stream and apply your own filters or, conversely, disable standard ones. One of the most popular solutions is an application Lesser AudioSwitchthat gives full control over the choice of input and output device.

Another powerful tool is Dolby On or analogues from sound chip manufacturers, however, to disable noise reduction, applications like Mic Gain or Sound Assistant (especially relevant for owners Samsung). In Sound Assistant you can configure individual settings for each application, which allows you to turn off audio processing only for the voice recorder, leaving it active for calls.

• 🎙️ Lesser AudioSwitch: Allows you to force the selection of a specific microphone and disable automatic switching, which often activates the noise reduction.
• 🎚️ Volume Control: Allows you to adjust the microphone gain manually, bypassing standard limits systems.
• 🎧 Sound Assistant: Offers detailed equalizer and effects settings for individual applications, including disabling virtual surround.

When using such applications, it is important to grant them all necessary permissions. Go to Settings → Applications, find the installed utility and make sure that access to microphone and, if necessary, the right to change system settings is allowed. Without these rights, the application will not be able to intercept control of the audio stream.

Application	Main function	Setting complexity	Requires Root
Lesser AudioSwitch	Selecting an input device	Low	No
Sound Assistant	Setting effects by application	Medium	No
Mic Gain	Manual signal amplification	Low	No
Wavelet	Automatic frequency response correction	High	No (preferred)

Specific settings on Samsung and Xiaomi smartphones

Owners of devices from leading Chinese and Korean brands are often faced with unique implementations of audio subsystems. On smartphones Samsung with a shell One UI there is a built-in application Sound Assistantthat can be downloaded from the store Galaxy Store. It has the “Separate application settings” function, which allows you to disable any sound effects for specific software.

For devices Xiaomi, Redmi and Poco with a shell MIUI or HyperOS the situation is a little more complicated. This is where you often see the “Enhance sound when recording” function in a standard voice recorder. Open the Voice Recorder app, tap the three dots in the corner and select Settings. Find the item Noise reduction or Noise Reduction and set the switch to inactive.

In addition, phones Xiaomi have a hidden engineering menu, which can be accessed by dialing a special code in the phone app. Enter the code ##3646633## (works on MediaTek processors) or ##4636## (universal Android code). In the menu Hardware Testing find the section Audio → Audio Debug. Here you can experiment with profiles Normal Mode and Headset Mode, disabling parameters NC (Noise Cancellation).

⚠️ Attention: Changing parameters in the engineering menu may lead to the communication module not working. Do not change the values ​​if you are not sure of their purpose, and do not save the settings without understanding the consequences.

Codes for entering the engineering menu

Universal code ##4636## works on most pure Android and some custom firmware. For MediaTek processors it is often used ##3646633##, but for Qualcomm the code may differ depending on the manufacturer. If the code does not work, access to the engineering menu may be blocked by the telecom operator or manufacturer.

Recording sound through third-party voice recorders

If your goal is to get a clean recording without noise suppression, and not change the quality of calls, the most effective solution would be to abandon the standard Voice Recorder application. Standard utilities almost always apply harsh post-processing. Installing an alternative recorder allows you to get a “raw” audio signal.

It is recommended to use applications that support the format WAV without compression and have manual settings (gain). An excellent choice is RecForge II or Hi-Q MP3 Voice Recorder. In the settings of these applications, you need to find the “Audio Source” section and select the option Unprocessed or Camcorder, instead of the standard Mic. Source Camcorder often disables noise reduction algorithms, since it is assumed that the videographer himself controls the environment.

Also in such applications, you can manually disable the High-Pass Filter, which is often used to remove low-frequency hum, but at the same time makes the voice unnatural. Experiment with sample rate: setting the value 44.1 kHz or 48 kHz bitrate 16 bit provides a balance between quality and file size, while preserving voice detail.

Hardware limitations and physical methods

It is important to understand that in some modern flagship smartphones noise reduction is implemented at the hardware level using additional microphones. These microphones pick up background noise and generate antiphase, physically canceling it out before the signal is digitized. In such cases, software disabling the function may be impossible or ineffective.

If software methods do not help, you can resort to physical tricks. For example, when recording voice in a quiet room, you can carefully cover the secondary microphone (usually located on the top end of the case) with a piece of masking tape. This will prevent the system from picking up background noise and the algorithm will not attempt to suppress it, leaving the underlying signal clean.

However, this method requires caution. Taping the main microphone will result in complete loss of sound. Always test the recording after manipulating the device body. In addition, the use of an external loop or directional microphone connected through the USB-C or 3.5 mmjack completely disables the built-in audio processing system, transmitting the signal directly from the external device.

• 🔌 Using an external USB microphone completely bypasses built-in processing algorithms.
• 📼 Recording through a headset with a remote microphone often produces cleaner results than the built-in sensor.
• 🚫 Physically locking the secondary microphone requires precision so as not to damage the main recording channel.

Frequently Asked Questions (FAQ)

Why did my voice become quieter after turning off noise reduction?

Noise reduction algorithms often work in tandem with automatic signal amplification (AGC). When you turn off noise reduction, the system may no longer compensate for volume losses caused by filtering. Try increasing the microphone volume in the settings of a third-party application or using an external amplifier.

Is it possible to completely disable noise reduction in WhatsApp?

There is no such setting in the WhatsApp application itself. However, if you're using Android 12 and above, you can try limiting microphone access for the app in your privacy settings and then using a third-party audio mixer, but it's tricky. The easiest way is to record a voice message through a third-party voice recorder with noise reduction disabled and send it as a file.

Does the case affect the operation of the noise reduction system?

Yes, a thick case can block the holes of secondary microphones designed to collect background noise. This can throw off the calibration of the system, causing it to process sound incorrectly or, conversely, stop producing noise because it cannot detect it. Check if the technical holes on the case are closed.

Resetting the phone settings will help remove noise reduction?

Resetting to factory settings will return all parameters to the “default” state set by the manufacturer. If the manufacturer has hard-coded noise reduction into the firmware, resetting will not help. However, this may remove errors that occurred after a software update that caused audio filters to work incorrectly.

Is it safe to use the engineering menu to adjust the sound?

Using the engineering menu carries certain risks. Changing critical parameters may cause the microphone to stop working altogether or the sound to become distorted. It is recommended that you do not save changes if you do not see immediate improvement, and always remember to reset your network settings or completely reset your device.