By using the [Rec] button on the audio board board, when the button is pressed, it will record and when the button is released, it will playback the recorded file.
For Spiffs Partition:
- We need to add a spiffs partiton to the partition table like the last line of partition_spiffs_example.csv.
For the Recorder:
- We will set up I2S and get audio at sample rate 48000 Hz, 16-bits, 2 channels.
- Using resample-filter to convert to 8000 Hz, 16-bits, 1 channel.
- Encode with AMRNB encoder.
- Write to Spiffs.
For the Playback:
- We will read the recorded file with sample rate 8000 Hz, 16-bits, 1 channel.
- Decode with AMR decoder.
- Using resample-filter to convert to 48000 Hz, 16-bits, 2 channels.
- Write the audio to I2S.
| ESP32-LyraT | ESP32-LyraT-MSC |
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Prepare the audio board:
- Connect speakers or headphones to the board.
Configure the example:
- Select compatible audio board in
menuconfig>Audio HAL.
Load and run the example:
- Press [Rec] button to start sound receding to a file.
- When [Rec] button is released, it will playback the recorded file.
- To stop the pipeline press [Mode] Button on the audio board.