Audio Codec - Basic Input Output
- AmebaD [ AMB23 / AMB21 / AMB22 / AW-CU488 Thing Plus ] x 1
- Potentiometer x 1
- Analog microphone x 1 (e.g., Adafruit 1063 / 1064)
- 3.5mm TRS/TRRS breakout x 1 (e.g., Adafruit 2791 / Sparkfun 11570)
Connect the potentiometer, microphone and 3.5mm connector to the RTL8722 board following the diagram.
AMB21 / AMB22:
AW-CU488 Thing Plus:
Open the example, “Files” -> “Examples” -> “AmebaAudioCodec” -> “BasicInputOutput”.
Upload the code and press the reset button on Ameba once the upload is finished.
Connect a pair of wired headphones to the 3.5mm audio jack, blow at the microphone, and you should hear the sounds picked-up by the microphone replayed in the headphones. Adjust the potentiometer and the output volume will change as well. Note: if you are using a microphone with an amplifier included, such as Adafruit 1063, the amplifier can lead to the microphone picking up more noise.