How to increase the volume of the microphone on Xiaomi: a step-by-step guide

Have you noticed that the interlocutor does not hear you when calling or recording voice on Xiaomi?The problem of weak microphone sound is familiar to many owners of smartphones of this brand – especially on models Redmi Note 10/11, POCO X3/X4 or Mi 11. The reasons can lie in both the software limitations of MIUI and hardware features of the device.

In this article, we'll look at 7 proven ways to turn up the microphone volume, from standard settings to hidden engineering menus and third-party utilities. Importantly, some methods require root rights or USB debugging, so prepare the cable and the computer in advance. Let's start with the simplest solutions!

1. Checking the physical health of the microphone

Before digging into the settings, make sure the problem isn't with the hardware. Xiaomi smartphones usually have 2-3 microphones:

• 🎤 Main (below next to the connector) USB-C) — Responsible for voice during calls.
• 🎤 Top (near speaker) – used for noise reduction and video recording.
• 🎤 Additional (on some models, for example, Xiaomi 12 Pro) – for spatial sound.

How to check:

1. Call another phone and talk, and you turn your finger over each microphone, and if you lose the sound when you close one of them, it's good.
2. Write down the voice memo in the Dictaphone app (MIUI included), if the recording is silent or jammed, it's a software problem.
3. Blow microphone holes with compressed air (such as a canister to clean the keyboard). Dust and pile are common causes of poor hearing.

⚠️ Attention: Don't use sharp objects to clean the microphone! This can damage the membrane. If the sound doesn't improve after blowing out, go to software methods.

2.Music settings in MIUI: hidden parameters

MIUI hides some audio options, but you can activate them through Settings → Special features or engineering menus.

Step 1: Increase the volume of the microphone during calls

1. Open Settings → Sound and vibration → Volume.
2. Slap the icon. ⚙️ (gear) in upper right corner.
3. Activate the option to amplify your voice while calling (available on MIUI 12.5+).

Step 2: Adjust the sensitivity of the microphone in the recorder

• 📱 Open the standard Dictaphone application.
• 🔊 Press three points (⋮) → Settings → Recording quality.
• 🎙️ Choose High (AAC) Or without compression (WAV) — This will increase the volume of the recording.

If these options are not available, your Xiaomi model may use a stripped-down version of MIUI (for example, for the European market), in which case move on to the next section.

Physical condition of microphones checked |

Updated MIUI to the latest version|

Backup of important data |

Internet connection (for downloading applications)-->

3. Engineering menu: manual microphone gain setting

The MTK Engineering Mode or Qualcomm Service Menu allows you to manually adjust the microphone settings. Careful: incorrect settings can lead to distortion of the sound or break the speakers!

For Qualcomm processors (most Xiaomi):

1. Open the phone app and enter the code: ##4636##
2. Select Phone Information → scroll down to Microphone Settings.
3. Find the Mic Volume or Mic Gain settings and increase the value by 5-10 dB (maximum 20 dB).

For MediaTek processors (Redmi 9, POCO M3, etc.):

1. Enter the code ##36446337##
2. Go to Hardware Testing → Audio → Mic Test.
3. In the Volume field, set the value 200-250 (by default 150).

⚠️ Warning: After the changes to the engineering menu, restart your phone. If the sound becomes distorted (wheezing, echoing), return the settings to the factory settings!

4. Third-party applications for microphone amplification

If standard methods didn't work, use specialized utilities. We tested 5 applications, and the best results were:

Instructions for setting up the Microphone Volume Booster:

1. Install the app and give access to the microphone.
2. Move the Mic Volume slider 70-80% (maximum can cause distortion).
3. Activate the Noise Reduction option to suppress noise.
4. Test the sound in a bell or recorder.

If the application doesn’t work, check if MIUI Optimization blocks it (disable Settings → Applications → Permissions Management → Special Access).

💡

Before using third-party utilities, turn off system audio optimization: go to Settings → Battery and Performance → Application Power Management and add the application to exceptions.

5. Adjustment via ADB: for advanced users

If you are willing to work with ADB (Android Debug Bridge, you can manually change the microphone settings in system files. This method requires an unlocked bootloader and a computer. USB-debugging.

Step 1 Connect to ADB

1. Download the Google Platform Tools.
2. Turn on USB Debugging in Settings → About Phone → MIUI Version (stick 7 times) → Additional → For Developers.
3. Connect your phone to your PC and execute the command: Adb devices (you should display your device).

Step 2: Change the microphone settings

Run a command to view the current settings:

adb shell settings list | grep mic

Then turn up the volume (example for Qualcomm):

adb shell settings put global mic_gain 20

For MediaTek, use:

adb shell am broadcast -a android.media.action.SET_MICROPHONE_GAIN --ei android.media.extra.MIC_GAIN 200

⚠️ Attention: Wrong commands ADB If you're not sure, use the apps in the previous section.

💡

ADB-It gives you maximum control over sound, but it requires technical skills. For most users, an engineering menu or third-party apps is enough.

Hardware solutions: when software methods do not help

If none of these methods worked, the problem may be:

• 🔌 Poor contact of microphone plume (frequent problem after falls).
• 🔋 Wear of the microphone membrane (natural aging after 2-3 years of use).
• 🛠️ Damage to the sound chip (for example, after moisture is ingested).

How to diagnose:

1. Connect headphones with a microphone – if the sound in them is normal, the problem is in the hardware of the phone.
2. Check the microphone on another device (e.g., via USB-C → 3.5mm jack adapter).
3. If the phone was in repair, perhaps the masters did not connect the microphone plume.

Decisions:

• 🔧 Replacement of microphone – costs 500-1500 ₽ service-centre.
• 🔄 Flashing the sound chip (helps with software failures).
• 📱 Using an external microphone (e.g. Lavalier or Boya) BY-M1).

On Xiaomi models with a 3.5 mm connector (Redmi Note 8 Pro, POCO X3 NFC), you can connect an external microphone through an adapter - it will cost less than repair.

7. Frequent mistakes and how to avoid them

When trying to turn up the microphone, users often make these mistakes:

If the microphone has stopped working after the change:

1. Reset the sound settings via the engineering menu (select Restore Default).
2. Reverse to factory settings (Settings → Additional → Recovery and Reset).
3. Fly your phone through the Mi Flash Tool (instructions at xiaomiflash.com).

FAQ: Answers to Frequent Questions