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

[CoppolaVH]

We are looking at options for 24 bit output over HDMI.

Currently the pi downsamples to 16 bit.   

We understand the Openmax (https://www.khronos.org/openmaxil) is a possible solution that can play 24 bit.  Does anybody have any success in doing so with Openmax, or other solutions to output at 24 bit, please.

[Tim Curtis]

What company are you referring to when you say "We"?

[CoppolaVH]

What company are you referring to when you say "We"?

No company, my friend and I who are retired audio enthusiasts.

[Tim Curtis]

You should post the issue on raspberry pi linux git.
https://github.com/raspberrypi/linux/issues

[CoppolaVH]

You should post the issue on raspberry pi linux git.
https://github.com/raspberrypi/linux/issues

Yes and I have done so.

[Tim Curtis]

Please post the link to the issue so users can track its progress.

[CoppolaVH]

Please post the link to the issue so users can track its progress.

Ok.  Here are the links to issues I posted at github and the pi forum.

https://github.com/raspberrypi/linux/issues/4204

https://www.raspberrypi.org/forums/viewt...5#p1834565

[CoppolaVH]

Please post the link to the issue so users can track its progress.

Ok.  Here are the links to issues I posted at github and the pi forum.

https://github.com/raspberrypi/linux/issues/4204

https://www.raspberrypi.org/forums/viewt...5#p1834565

Was able to get the Justboom Digi Hat hooked up via optical cable, and that solved the 2 channel 24 bit out issue as outlined below:

Encoded at24 bit, 192 kHz, Stereo FLAC
Decoded to24 bit, 192 kHz, Stereo, 3.486 Mbps
DestinationLocal
Output rate24 bit, 192 kHz, Stereo, 9.216 Mbps

[jcucurull]

Same problem here with a Raspberry Pi 3b...

For me the solution proposed is not acceptable, because I have many 24/96 files with 5.1 channels, which cannot be output via SPDIF, but only via HDMI. So, any other solution?

[CoppolaVH]

I know what you mean, and I feel the same way, but given Moode Audio is a LINUX kernel 5.4 branch I don't think we have a way to solve this issue.  I am decidedly not the technical person, but I understand later kernels may have a way to address this, but frankly I gave up as has the github link I posted gotten no solve.