How to turn on noise cancellation on Xiaomi Redmi Note 8T: 5 working ways

Xiaomi Redmi Note 8T is a popular smartphone with a good microphone, but in noisy conditions (street, transport, office) the interlocutor can not hear your voice. Fortunately, the device has built-in and hidden noise reduction functions that will help improve the quality of communication. In this article, we will analyze all available methods, from standard settings to advanced tricks with engineering menus.

It's important to understand that the noise cancellation on the Redmi Note 8T works differently depending on the scenario: when you call, record video or use instant messengers. We tested all the methods on MIUI 11-14 firmware and identified the most effective ones, and if you often call in noisy places or stream — this is the guide for you.

1. Enabling noise reduction in call settings

The easiest way to activate noise cancellation is through the phone's standard menu, which works during voice calls (both over mobile and via VoIP).

1. Open the phone application (pipe icon).
2. Slip on three dots in the upper right corner → select Settings.
3. Go to the Sound and Vibration section when calling.
4. Activate the Noise Cancel Slider (or Voice Improvement in some versions of MIUI).

Once turned on, Xiaomi’s algorithms will automatically filter background noises (wind, traffic, other people’s voices) during a conversation, and the effect is noticeable after the first call, but only works for the built-in Phone app. WhatsApp, Telegram, or Zoom will require other methods (see Section 4).

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If the Noise Reduction option is not on the menu, upgrade to the latest version of MIUI. In older builds (below 12.0), the function may be hidden.

2. setting up the microphone in the engineering menu (advanced method)

You can use the engineering menu (#4636## or #36446337##) to fine-tune the noise reduction, which is suitable for advanced users, as incorrect changes can worsen the sound quality.

1. Open the Phone app and enter the code: ##36446337###
2. Select Hardware Testing → Audio → Mic Test.
3. In the Noise Suppression section, set the value “On”.
4. For additional optimization, change the Mic Gain setting to “Low” (if the voice sounds too quiet) or “Medium” (default).

You can also test the microphone in real time on the engineering menu, by talking to the microphone and watching the Input Level graphic. If the signal level is too low (less than 30%), increase the Mic Gain. Changes to the engineering menu are reset after the reboot, so you need to apply them again.

3. Noise reduction for recording video and voice messages

When recording video through a standard Redmi Note 8T camera, noise cancellation is automatically activated, but it can be amplified.

1. Open the Camera app.
2. Go to Video Mode.
3. Put it on the gear (⚙️) → Video settings.
4. Activate the Sound Improvement or Noise Reduction option (name depends on the MIUI version).

For voice messages in instant messengers (for example, WhatsApp or Viber), noise cancellation is included in the settings of the application itself:

• 📱 WhatsApp: Settings → Warehouse and data → Quality of voice messages → High (activates built-in noise filtering).
• 💬 Telegram: Noise cancellation works automatically when recording voice messages, but it can be enhanced through Settings → Calls. → Improve the sound.
• 🎤 Viber: Settings → Calls and videos → Improvement of sound.

Standard Call (SIM)

WhatsApp

Telegram

Viber

Zoom/Google Meet

Other-->

Third-party applications for noise reduction

If the built-in features of the Redmi Note 8T can't handle noise, you can install specialized applications. We tested 5 popular utilities and identified the best ones:

To install any of these applications:

1. Download APK from Google Play or official website.
2. Give permission to access the microphone and phone.
3. In the application settings, enable Active Noise Reduction or Noise Reduction.
4. Select applications that need to filter noise (such as Zoom or Discord).

Download the app from Google Play

Register an account (email or Google)

Provide access to the microphone

Turn Krisp on in the system sound settings

Test call for quality check-->

5 Problems and Solutions: Why Noise Reduction Doesn't Work

Sometimes the noise reduction function may not work or not work properly, and consider the typical causes and ways to eliminate them:

• 🔇 The gray color function in the settings: it means your version MIUI It doesn't support noise cancellation. Solution -- update the firmware through Settings. → The phone. → Updating the system.
• 🎙️ The microphone is bad at catching voice: check if the microphone hole is covered with a cover or dirt. Clean it with a soft brush.
• 📱 Noise reduction works only in headphones: in some firmware, the function is activated only when the headset is connected.
• 🔄 After updating MIUI function is missing: reset the settings of the Phone application through Settings → Annexes → Phone. → Warehouse → Clear the data.

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If no noise reduction is enabled by either method, check the microphone's performance through the engineering menu (#36446337## → Mic Test). If the signal level is missing, it is possible that the microphone is physically damaged.

Another common problem is echoes during calls, which arise from the conflict of noise cancellation with other audio effects, to eliminate echoes.

1. Turn off all sound effects in Settings → Sound → Sound Effects.
2. In the engineering menu (#36446337##) set Echo Cancellation to the "On" position.
3. Use headphones instead of a speaker.

Alternative methods: physical isolation of noise

In addition to software solutions, you can improve the sound quality in physical ways:

• 🎧 Use headphones with a microphone: even a cheap headset with a microphone on the wire reduces background noise, since the microphone is closer to the mouth.
• 📱 Hold your phone correctly: Redmi Note's bottom microphone 8T near-connector USB-C. Do not close your finger while talking.
• 🏠 Call in quiet places: if you are indoors, close the windows and doors.
• 🛡️ Use windscreen: you can buy an inexpensive pop filter for the microphone (attached to the case) or make it from foam.

For streamers and bloggers who record videos on the Redmi Note 8T, we recommend using an external microphone (such as Boya BY-M1 or Rode VideoMic), which connects via a USB-C or 3.5 mm connector and gives a much cleaner sound than the built-in microphone.

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If you make frequent calls in the car, attach the phone to the holder so that the microphone is pointed towards your mouth, not the windshield (where you hear road noises).

FAQ: Frequent questions about noise cancellation on the Redmi Note 8T