Sound issue

The recording feature currently supports two scenarios: capturing currently playing media content (Snapshot) and recording phone calls. It is not designed as a general-purpose voice recorder and therefore does not support recording ambient sounds or personal voice memos directly.

If you need to record meetings, voice notes, or surrounding sounds, we recommend using a recording app on your phone.

The recording feature is designed primarily for capturing speech and spoken content, such as conversations, meetings, lectures, and voice notes. To balance recording quality, storage usage, and processing efficiency, recordings are optimized for voice playback rather than high-fidelity audio reproduction.

As a result, speech content should remain clear and easy to understand, while music or other complex audio may sound less detailed than the original source.

Please ensure that you have the necessary rights and permissions before recording any copyrighted content.

This is expected behavior.

To minimize interruptions during calls, the recording voice prompt is played through only one earbud instead of both. This helps ensure that the prompt is heard clearly while reducing interference with the ongoing conversation.

The specific earbud used for the prompt may vary, as call recording is handled by a single earbud during recording. As a result, the voice prompt will be played through the earbud responsible for the recording.

Due to local laws and regulations, the call recording feature is only available in certain regions; it is disabled in regions where it is not supported. Currently supported regions: Australia | Canada | China (Mainland) | France | Germany | Hong Kong, China | India | Indonesia | Israel | Italy | Japan | Malaysia | Netherlands | New Zealand | Philippines | Singapore | South Korea | Taiwan, China | Thailand | United Kingdom | United States

In some cases, certain apps may continue outputting a silent audio stream after media playback has been paused or finished. Since Snapshot automatically stops recording when playback ends, it may continue recording until the audio stream fully stops. As a result, the final recording may include a period of silence.

This behaviour depends on how the audio app manages playback and does not affect the quality of the recorded audio content itself.

Instead of offering two separate bass-related features—Bass Enhancement and More Bass—we've streamlined the experience by focusing on the More Bass preset within Simple EQ.
This reduces overlap in functionality and makes it easier for users to achieve a richer bass sound with just one tap. At the same time, we've further refined the Simple EQ tuning to deliver deeper, more impactful bass for an even more satisfying listening experience.

The sound quality is tuned based on a large amount of user experience and reaches a relatively high level in the industry. However, different users may have different experiences with the sound quality. We recommend that you download the Nothing X App, enter it, and select the pre-set sound effects on the EQ page, or customize your sound using the Advanced EQ.

Due to compatibility issues with the Bluetooth connection preemption and dual-connection functions of the terminal device system, some devices may experience a delay in sound output when switching between dual-connection music channels or during connection preemption. This issue may occur with all TWS Bluetooth Earbuds available on the market. It is recommended that you directly connect the Earbuds to your device for experience. This is not an abnormality of the Earbuds, so you can use them with confidence.

It supports active noise cancellation with a maximum of 45dB. We recommend that you download the Nothing X App, go into the app and check the ANC settings in the Noise Control section. This setting offers multiple effect options such as "High/MID/LOW/Adaptive". At the same time, we kindly remind you that if the ear tips are not worn properly, resulting in poor airtightness for noise cancellation, it will also cause the noise cancellation effect to be poor or ineffective. The Earbuds come with ear tips of different sizes at the time of delivery, and we recommend that you try replacing them with different ear tips.

Nothing Headphone (a) has been acoustically tuned by Nothing based on extensive user testing and delivers competitive sound quality. However, sound perception can vary between users.

Please first ensure the headphones are worn correctly and that the ear cushions form a proper seal. If the fit is optimal, we recommend opening the Nothing X app, navigating to the EQ section, and selecting a preset sound profile or creating a custom EQ.

If you notice distortion or noise, please ensure that any EQ settings in your music playback app are disabled to avoid conflicts.

Nothing Headphone (a) supports Active Noise Cancellation (ANC) with a maximum depth of 40 dB. We recommend opening the Nothing X app and navigating to Noise Control to check your ANC settings. Available modes include High/Mid/Low/Adaptive.

Please also ensure the ear cushions fit snugly around your ears. An improper seal can reduce air-tightness and significantly affect noise cancellation performance.

This is often the case with over-ear headphones.

Wired audio doesn't support absolute volume control. To ensure maximum output on the headphones, the wired audio default volume is set to 100%. After connecting with a wired cable, you need to manually adjust the volume to a comfortable level.

Bluetooth audio supports absolute volume control, allowing quicker volume adjustments, so its default volume is set around 50%. You can also adjust the volume using the headphones’ roller or the device’s volume buttons to adjust to your preferred level.

1. CMF Headphone Pro doesn't support USB audio for music playback.
2. When using the 3.5mm aux-in audio cable, volume can't be adjusted using the headphones’ roller and can only be controlled via the connected device’s volume buttons. This is often the case with over-ear headphones and does not indicate a problem with CMF Headphone Pro.

Please note that if a non-standard aux-in cable (such as a 4-pole one) is used, there may be no sound output. We recommend using the official aux-in cable.

1. CMF Headphone Pro doesn't support USB audio for music playback.
2. The 3.5mm aux-in audio cable allows you to listen to music only. Please note that CMF Headphone Pro uses a three-segment 3.5mm aux-in which does not support microphone input.

Please note that if a non-standard aux-in cable (such as a 4-pole one) is used, there may be no sound output. We recommend using the official aux-in cable.

The sound quality of the CMF Headphone Pro has been tuned based on extensive user feedback. It is considered to be at a relatively high level within the industry. However, we understand that audio perception can vary between users.

Please first ensure that the headphones are worn correctly with a proper seal, as a poor fit can significantly affect sound quality. If the fit is good but you’re still not satisfied, we recommend downloading the Nothing X app. Within the app, go to the Equaliser section where you can try different preset sound profiles or create your own custom EQ settings to better match your listening preferences.

A delay in audio output may occur during music channel switching or connection snatching in Dual Connection mode. This is due to compatibility issues related to Bluetooth connection priority and Dual Connection functionality on some devices. It's a common issue with over-ear Bluetooth headphones across the market, so doesn't indicate a problem with CMF Headphone Pro.

We recommend directly connecting the headphones to the device you want to use, and closing background audio apps on other connected devices.

CMF Headphone Pro supports Active Noise Cancellation (ANC) with a maximum depth of 40dB. We recommend downloading the Nothing X app and navigating to Noise Control to check your ANC settings. The app offers multiple options including High / Mid / Low / Adaptive modes.

Please also ensure that the ear cushions are properly sealed around your ears. A poor fit can affect the air-tightness and significantly reduce noise cancellation performance.

The sound quality of Ear (3) is tuned based on extensive user experiences and is at a relatively high industry standard. Download the Nothing X app and access the Equaliser page to choose from preset sound effects or customise to your personal preferences in the Custom settings.

Due to compatibility issues with Bluetooth Fast Pair and Dual Connection of some device systems, there may be occasional delays in sound output when you switch music channels or try to connect your device. Please rest assured this doesn't indicate any fault with Ear (3).

Ear (3) supports Active Noise Cancellation (ANC) up to 45 dB. We recommend downloading the Nothing X app and checking the ANC settings under Noise Control. This setting offers multiple options such as High, Mid, Low and Adaptive.

Improper fitting of the ear tips can affect the noise cancellation seal, resulting in poor or ineffective noise cancellation. We suggest trying different ear tips to find the best fit for optimal noise cancellation.

For more precise adjustments and settings, please use the Nothing X app, available on Google Play and the iOS App Store.

The Nothing headphone (1) uses a three-segment 3.5mm jack that does not support microphone input, so MIC calls are not available via the Aux-In connection.

The sound quality of CMF earbuds is tuned based on extensive user experiences and is at a relatively high industry standard. However, individual preferences for sound quality may vary. We recommend downloading the Nothing X App and accessing the Equaliser page to choose preset sound effects. Additionally, you can customise the sound according to your personal preferences in the Custom settings.

The sound quality of Ear (open) is based on extensive user experiences, at a relatively high industry standard. However, individual preferences for sound quality may vary. We recommend downloading the Nothing X App and accessing the Equaliser to choose preset sound effects. Additionally, you can customise the sound according to your personal preferences in the Custom settings. For an optimal sound experience, ensure you're not in a noisy environment as Ear (open) doesn't support ANC.

Due to compatibility issues with Bluetooth Fast Pair and Dual Connection of some device systems, there may be occasional delays in sound output when you switch music channels or try to connect your device. Please rest assured this doesn't indicate any fault with Ear (open).

The sound quality of CMF Buds Pro 2 is tuned based on extensive user experiences and is at a relatively high industry standard. However, individual preferences for sound quality may vary. We recommend downloading the Nothing X App and accessing the Equalizer page to choose preset sound effects. Additionally, you can customise the sound according to your personal preferences in the Custom settings.

CMF Buds Pro 2 supports active noise cancellation (ANC) up to 50dB. We recommend downloading the Nothing X app and checking the ANC settings under Noise Control. This setting offers multiple options such as "High," "Mid," "Low," and "Adaptive."

We also advise that improper fitting of the ear tips can affect the noise cancellation seal, resulting in poor or ineffective noise cancellation. The earbuds come with different sizes of ear tips. We suggest trying different ear tips to find the best fit for optimal noise cancellation.

For more precise adjustments and settings, please use the Nothing X app, available on Google Play and the iOS App Store.