Hello,

I think your approach is not real-time. In the loop function, you first call `i2s_read_bytes` then wait 6 ms, then you send them to i2s output, and then, again you read the next batch. The latter batch you read is 6 ms late. I don't know Arduino-style coding on esp32 but there should be a ...

Ok, the problem is caused by `uint16_t`. Converting it to `int16_t` solved the problem. Here is the corrected part:

static int el_process(audio_element_handle_t self, char *buf, int len) {
int rsize = audio_element_input(self, buf, len);

if (len != rsize || (rsize % 4) != 0) {
ESP_LOGW(TAG ...

Hi friends!
I have modified my code. It works well now.
The sound from the MEMS microphone via the I2S_NUM_0 I2S interface goes to the ESP32 and immediately to the output via I2S_NUM_0 I2S to the DAC PCM5102A.
Now I want to try processing my sound. This will take time.
If I insert a delay of 6-8 ms ...

Here is a complete example, I verified it works:

/*
* app_main.c
*
* Created on: 30.03.2017
* Author: michaelboeckling
*/

#include <stdlib.h>
#include <stddef.h>
#include <inttypes.h>
#include <string.h>
#include <stdio.h>
#include <stdbool.h>
#include <sys/time.h>

#include "freertos ...