# Audio configuration

***Copyright © Quectel Wireless Solutions Co., Ltd. 2026. All rights reserved.***

---

# Audio Configuration

The Quectel Pi M2 supports onboard audio input/output and external headset functions. Audio input devices, output devices, and volume can be configured through the system sound settings.

# Hardware Audio Interfaces

The Quectel Pi M2 is equipped with an onboard ES8389 audio codec and provides an onboard MEMS microphone, a 3.5 mm headset jack, and speaker output.

| <div style="text-align: center"><br><strong>Audio Interface</strong><br></div> | <div style="text-align: center"><br><strong>Description</strong><br></div> |
| --- | --- |
| Onboard MEMS MIC | Used for audio capture and can be used as the system's built-in microphone |
| 3.5 mm Headset Jack | Supports headphone audio output and headset microphone input |
| Speaker Output | Supports audio playback through the speaker. |

```{image} images/image_MNA1bL2X3ooabbxEpohcENjjnBf.webp
:width: 1318px
:height: 828px
:align: center
```

# Basic System Audio Settings

Enter the GNOME desktop and open Settings → Sound. You can configure the system's output device **,** output volume **,** input device **,** and input volume separately.

```{image} images/image_SAXcbMszOoXrF4x5xyLcI2P4nI9.webp
:width: 1280px
:height: 800px
:align: center
```

```{image} images/image_FSQXbF8s6oYD7vxBBjncxnGonIe.webp
:width: 1280px
:height: 800px
:align: center
```

## Output Device

When no external headset is connected, the system can detect the audio output device Analog Output - Built-in Audio. The playback volume can be adjusted using Output Volume, and the left and right audio channels can be adjusted using Balance.

```{image} images/image_SMB1bieNno93hcxcAoZcjP6PnWe.webp
:width: 1280px
:height: 800px
:align: center
```

## Input Device

When using the onboard microphone, the system can detect the input device Internal Microphone - Built-in Audio. The microphone input volume can be adjusted using Input Volume.

```{image} images/image_P6AZblNHno6YCNxct6Uc7vssnjc.webp
:width: 1280px
:height: 800px
:align: center
```

# External Headset

The Quectel Pi M2 provides a 3.5 mm CTIA headset jack, supporting headphone audio output and headset microphone input.

After connecting a headset with a microphone, the system can detect the following devices:

- Output device: Headphones - Built-in Audio

- Input device: Headset Microphone - Built-in Audio

```{image} images/image_BbARbYiWToruBLxq6W4c7gBbnig.webp
:width: 1280px
:height: 800px
:align: center
```

## Headphone Playback

- Insert the 3.5 mm headset into the headset jack of the Quectel Pi M2.

-  After the system detects the headset, it automatically switches the audio output to the headphones. No manual output device configuration is required. 

-  Play an audio or video file. 

-  If the sound can be heard normally through the headphones, the headphone audio output function is working properly.

## Headset Microphone Recording

- Insert a 3.5 mm CTIA headset with a microphone into the headset jack of the Quectel Pi M2.

- After the system detects the headset, it automatically switches the audio input to the headset microphone. No manual input device configuration is required.

- Open the system Sound Recorder application.

- Start recording and input sound through the headset microphone.

- After recording, play the recorded audio file. If the recorded sound can be heard normally, the headset microphone recording function is working properly.

# Onboard Microphone (Built-in MIC) Recording

The Quectel Pi M2 is equipped with an onboard MEMS microphone, which can be used directly for audio capture without connecting an external microphone.

## Recording Settings

-  Disconnect the external headset. 

-  Go to Settings → Sound. 

-  Confirm that the Input Device is set to Internal Microphone - Built-in Audio. 

-  Adjust the input volume as needed. 

## Recording Test

-  Open the system Sound Recorder application. 

-  Start recording and speak into the onboard microphone. 

-  Save the recorded file after recording is complete. 

-  Connect the headphones and play the recorded file. 

-  If the audio recorded by the onboard microphone can be played normally through the headphones, the onboard microphone recording function is working properly.

```{image} images/image_Nk7CbETg5ozKx2xgSUpcGOUvnZd.webp
:width: 1280px
:height: 800px
:align: center
```

# Speaker Playback Test

The Quectel Pi M2 supports audio playback through the speaker.

## Test Steps

-  Disconnect the external headphones. 

-  Go to Settings → Sound. 

-  Confirm that the output device is set to Analog Output - Built-in Audio. 

-  Increase the system output volume as needed. 

-  Play an audio or video file. 

-  Confirm that sound can be heard normally through the speaker.