Raspberry Pi 3/4 Audio Jack

On Raspberry Pi 3 and 4 models, the built-in audio jack is disabled by default. This is because enabling it will disable HDMI audio, USB DACs, and GPIO-based audio devices. Additionally, the integrated audio jack on these models only offers 11-bit audio quality, which is noticeably lower than other available outputs.

If you still wish to enable the audio jack, follow these steps:

1. Open /boot/firmware/config.txt in a text editor.
2. Set the line:

   dtparam=audio=on
   

3. Reboot your Raspberry Pi.
4. In the system audio settings, set the output device to GPIO.