I contacted Mirko, got the correct code, mixed with the updted version of the original Edzelf/ESP32-Radio one. I downloaded the patches and plugins for VS1053b but the plugin that do the spectrum ...

I added my SalatTime (prayer time) routines and display them. Also added Athan when the time occurs, it plays an azan.mp3 file. Just drop it in the root of the sdcard to let it play it. where ...