kodera2t/ESP32_OLED_webradio

How to change the volume?

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Please tell me how to adjust the volume, in which files to adjust the signal level. I tried the audio_renderer.s file to play with the values
  short left = * (short *) ptr_l;
  short right = * (short *) ptr_r;
The volume changes only on MP3 streams, and the AAC does not change in any way.