topic Re:Windows HDMI Audio Driver - WASAPI PCM 4.0 FL+FR+SL+SR layout support in Graphics

Windows HDMI Audio Driver - WASAPI PCM 4.0 FL+FR+SL+SR layout support

Krobaruk — Tue, 13 Jul 2021 11:14:48 GMT

Is there any plan to improve the multichannel PCM support in the Intel Windows HDMI audio driver?

For 4 PCM channels, channel mapping support seems to be as follows:
Quad (FL + FR + SBL +SBR) - Supported
3.1 (FL +FR + C + LFE) - Supported
4.0 (FL +FR + SL +SR) - Unsupported.

Support for 4.0 is becoming more important as increasingly Quad format is not supported by AV receivers.

PCM channel mapping support is likely to be included in the next major release of Kodi too so this will become more noticeable:
PCM 3.0 Output from HDMI (kodi.tv)

Tested on Intel 8th Gen Supermicro C246 motherboard (HDMI 1.4 output) and Dell laptop with 10th gen Intel CPU (HDMI 2.0 output) with the same result (WASAPI reports the channel layout is not supported). Other users have confirmed the same issue so does not seem to be hardware dependant. The layout is supported fine with Intel HDMI output in Linux so seems to be a driver/software problem.

Re:Windows HDMI Audio Driver - WASAPI PCM 4.0 FL+FR+SL+SR layout support

David_G_Intel — Wed, 14 Jul 2021 18:02:17 GMT

Hello Krobaruk

Thank you for posting on the Intel️® communities. Please specify which Intel product you own or for which product you are seeking information.

Regards,

David G

Intel Customer Support Technician

Re: Windows HDMI Audio Driver - WASAPI PCM 4.0 FL+FR+SL+SR layout support

Krobaruk — Wed, 14 Jul 2021 19:16:38 GMT

Two Intel based products I own are affected:
Dell Precision 3541 with 10th Gen I5
Intel 8th Gen I3 on a Supermicro X11SCA

The same issue exists for other hardware which uses the Intel HDMI audio driver as well.

Another possibility is if Intel mapped Quad to FL+FR+SL+SR in the HDMI audio info frame compatibility would greatly improve.

Re:Windows HDMI Audio Driver - WASAPI PCM 4.0 FL+FR+SL+SR layout support

David_G_Intel — Tue, 20 Jul 2021 05:12:08 GMT

Thank you for the update, we need the model of the processors to continue with this request. Please also share the Intel® System Support Utility (Intel® SSU) results:

Download the Intel SSU https://downloadcenter.intel.com/download/25293/Intel-System-Support-Utility-for-Windows-
Open the application and select "Everything" click on "Scan" to see the system and device information. By default, Intel® SSU will take you to the "Summary View".
Click on the menu where it says "Summary" to change to "Detailed View".
To save your scan, click on "Next", then "Save".

Regards,

David G

Intel Customer Support Technician

Re:Windows HDMI Audio Driver - WASAPI PCM 4.0 FL+FR+SL+SR layout support

David_G_Intel — Fri, 23 Jul 2021 22:48:30 GMT

Were you able to check the previous post?

Let us know if you still need assistance.

Best regards,

David G.

Intel Customer Support Technician

Re:Windows HDMI Audio Driver - WASAPI PCM 4.0 FL+FR+SL+SR layout support

David_G_Intel — Mon, 26 Jul 2021 20:34:32 GMT

We have not heard back from you, so we will close this thread. If you need any additional information, please submit a new question as this thread will no longer be monitored.

Best regards,

David G.

Intel Customer Support Technician