downmix_pipeline

Downmix Pipeline Example

This example shows how to use ESP-ADF multiple input pipeline to play back multiple files with down-mixer.

Compatibility

This example is will run on boards marked with green checkbox. Please remember to select the board in menuconfig as discussed is section Usage below.

Board Name	Getting Started	Chip	Compatible
ESP32-LyraT
ESP32-LyraTD-MSC
ESP32-LyraT-Mini
ESP32-Korvo-DU1906
ESP32-S2-Kaluga-1 Kit

Usage

Prepare the audio board:

• Connect speakers or headphone to the board.
• Insert a microSD card loaded with WAV files. NUMBER_SOURCE_FILE is number of WAV files. The name of WAV files are like test1.wav test2.wav and so on. And the sample rate of those files are same as SAMPLERATE.

Configure the example:

• Select compatible audio board in menuconfig > Audio HAL.

Load and run the example:

• The first file starts playing automatically after power on.
• Once [Mode] button is pressed, the second file with be mixed with the first file playing.