FabGL
ESP32 VGA Controller and Graphics Library
Configuring Audio port

Audio output connection uses GPIO 25 and requires a simple low-pass filter and peak limiter. This works for me (you may do better):

                                                               10uF
                      -------------                          + | | -
     GPIO25 ----------| R 270 Ohm |-------*---------*----------| |-------> OUT AUX LINE
                      -------------       |         |          | |
                                          |         |
                                          |         |
                                          |        ---
                                          |        |R|
                                 100nF  -----      | |
                                        -----      |1|
                                          |        |5|
                                          |        |0|
                                          |        ---
                                          |         |
                                          |         |
                                          +----*----+
                                               |
                                               |
                                             ----- GND
                                              ---
                                               -