I resolve problem with low volume by change function esp_err_t es8388_set_voice_volume(int volume) in es8388.c

This function works:

esp_err_t es8388_set_voice_volume(int volume)
{
esp_err_t res = ESP_OK;
if (volume < 0)
volume = 0;
else if (volume > 100)
volume = 100;
volume /= 3;
res = es ...

Hello,
I have a problem with ESP32 Audio Kit (AI Thinker board, similar to Lyrat v4.3). I compile and flash code from example/audio_processing/pipeline_passthru, connect audio jack on input from smartphone and headphones on output and volume is very low. How to make it working louder? Where in code ...