[SOLVED] 24 bit Output to HDMI downsamples to 16 bit

[Tim Curtis]

Are there any news on the support of 24bit output via HDMI?

I have noticed that since April the kernel of Moodeaudio has been upgraded to version 6.1.21. I thought that maybe the problem was solved, because in some forums they were mentioning that this could be related to the version 5.x. However, after upgrading my Moodeaudio to the last release (8.3.6) with the new kernel, it still happens the same.

I have also tried the solution posted in some forums that consists of modifying the config.txt file to remove the options dtparam=audio=on and dtoverlay=vc4-fkms-v3d and adding dtoverlay=vc4-kms-v3d. But this only creates an alsa error when I try to reproduce any song.

So, has nobody managed to play 24 bits audio (without 16 bit decrease) using the HDMI output? To me it is a bit suprising, because the HDMI of the Raspi is the more versatile and economical way to output the audio towards an AVR (no extra layers are needed), which I am sure is one of the most common use cases of Moodeaudio.

No news that I know of., at least as far as RaspiOS Bullseye goes. It's possible that HDMI audio has been improved in the new Bookworm platform but our project is not yet at a point where we have a moOde Bookworm image to test.

You can run moodeutl -F to see what formats and sample rates the HDMI interfaces support.