Audio Codec Breakout - WM8960 Hookup Guide
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Example 4: Speaker
In this example, we will pass a line level audio source into the WM8960's line input 1 port. The signal will go through the mixers and gain stages of the audio codec. For the output, we will be sending the audio to a pair of differential speakers.
Hardware Hookup
Connect power, I2C, line input 1, and the speakers on the output channels as explained earlier. Your circuit should look similar to the circuit diagram below.
If you have not already, insert a USB cable into your IoT RedBoard ESP32 and a TRS cable from your audio source (e.g. MP3 player, smartphone, or computer) into the audio connector.
Upload Code
From the menu, select the following: File > Examples > SparkFun WM8960 Arduino Library > Example_04_Speaker. If you have not already, select your Board (in this case the SparkFun ESP32 IoT RedBoard), and associated COM port. Then hit the upload button.
Open the Arduino Serial Monitor and set it to 115200 baud to view the serial output. Then hit the play button on your audio source. Make sure that the volume from the audio source is turned up. You should hear some music from the speakers.