Local Music Example for stereo speaker

Source code path: example/multimedia/audio/dual_adc_dac

Supported Platforms

• It cannot run on the SiFli module board; it requires a board made with the sf32lb58 series chip, and the board must have two analog microphones and two analog speakers.

Overview

This example demonstrates how to record the sound of two analog microphones simultaneously, and how to choose one of the microphones for recording:

Example Usage

Hardware Requirements

Before running this example, prepare:

• A board that can connect two analog microphones using the sf32lb58 chip (Supported Platforms).

• Speaker.

menuconfig Configuration

1. This example needs to read and write files, so it needs to use a file system. Configure the FAT file system:

   Tip

   Mount root partition in mnt_init.

2. Enable AUDIO CODEC and AUDIO PROC:

3. Enable AUDIO(AUDIO):

4. Enable AUDIO MANAGER.(AUDIO_USING_MANAGER)

5. (AUDIO_LOCAL_MUSIC)

6. Preset audio files (also supports MP3), place them in the \disk\ directory below for preset download:

• Audio files are under multimedia/audio/local_music/disk

Compilation and Programming

Because a customer-customized board is needed, it actually requires compilation using the custom board.Switch to the example project directory and run the scons command to execute compilation:

> scons --board=sf32lb58-lcd_n16r32n1_a1_dpi_hcpu -j8

Switch to the example project/build_xx directory and run uart_download.bat, select the port as prompted for download:

$ ./uart_download.bat

     Uart Download

please input the serial port num:5

For detailed steps on compilation and download, please refer to the relevant introduction in Quick Start.

Expected Results of Example

After the example starts:

input command by serial tools

1. mic2file

Two files will be generated after 10 seconds, which are the PCM recordings of the two microphones.

mic0_16k.pcm mic1_16k.pcm

2. mic2speaker 0 Use the first simulated microphone to collect data and play it on the speaker

3. mic2speaker 1 Use the second simulated microphone to collect data and play it on the speaker

Exception Diagnosis

Reference Documents

Update History

Version	Date	Release Notes
0.0.1	05/2026	Initial version