ESP32 audio kit support

[anamariarincon03]

Hi everyone!

I bought an ESP32 audio kit module and I saw the Arduino-audio-tools Library.

I would like to know if any of the Arduino examples are useful for my project. I need to record some audio and save it in the SD card in mp3 format without any need for additional components, just the ESP32 audio kit using the microphone and the SD card incorporated on it.

Someone can help me, please?

I will be waiting for your reply.

[pschatzmann]

Here is an example how you can record audio from the built in microphones to an encoded file.

I would not recommend to use any mp3 or aac encoder because of the limited memory and processing power, but you can try the related encoders. Just read the Wiki.

ps. don't forget to install the AudioKit project! when you want to use the AudioKit together with the AudioTools...

[anamariarincon03]

Hi Phil,

I will use the example and if I have any questions I will write to you again.

Thank you!

[anamariarincon03]

Hi Phil,

I installed both libraries but I have 2 questions:

1. Which board should I select in the Arduino to compile the code? I have an ESP32 Audio Kit V2.2 2957.
2. Do I need to add the line " #define AUDIOKIT_BOARD 1 " to the example you suggested?

Thank you.

[pschatzmann]

There is a Readme and a Wiki that should answer all questions!
https://github.com/pschatzmann/arduino-audiokit

[anamariarincon03]

Hi Phil,

I noticed that you set the Sample Frequency in 16000 Hz and I have another question, is it possible to change the Sample Frequency to record audio? For example change it to 3000 Hz or 10000 Hz.

I saw the Sample Frequency on the line "AudioInfo info(16000, 1, 16);"

[ansari14]

how can i set the sample rate in a7672s gsm module ?

[pschatzmann]

The wiki of the audiokit project contains the list of supported frequencies!