[PROBLEM] No sound coming out of the 3.5 jack on Cm4 nano b

[Fabien32]

@Fabien32

Have you read the documentation which applies to the CM4 Nano B?

I did. It took me a quick Google search to find https://www.waveshare.com/wiki/CM4-NANO-B

Here's what it says under Audio

Audio Interface

The Audio of this device uses GPIO. If you use GPIO18 and GPIO19, you need to enable via the configuration file.

1. Edit config.txt.
sudo nano /boot/config.txt

2.Add the following content at the bottom.
dtparam=audio=on
dtoverlay=audremap,pins_18_19

3.Reboot the CM4

sudo reboot

In moOde, the config.txt already contains the dtparam=audio=on line. I'd guess you need also to include the audremap line in order to direct audio signals from the CM4 to the Nano B carrier board's audio jack. Note that moOde also makes changes to this file so custom changes you make possibly could be overwritten later on.

I'll bet no other moOde user has this particular board so you'll have to do the testing yourself. The Raspberry Pi CM4 IO board I have, for example, has no audio jack.

Regards,
Kent

I was looking for something like that exactly, but didn't think to search on Google. Thanks
I will try this