[mythtv-users] HDMI audio only 2.0

Tue May 31 19:50:19 UTC 2022

On Tue, May 31, 2022 at 11:35 AM Justin Smith <justin at smithpolglase.com>
wrote:

> Hi,
>
> I've just put together a new mythtv box which uses an Intel i5-12400
> running on an Asus B660M motherboard. It's running Ubuntu 22.04
> desktop minimal and mythtv 32 fixes from the standard ppa. I'm using the
> built-in HDMI connected to a Marantz 5.1 receiver with the receiver HDMI
> out connected to the TV.
>
> My problem is that I cannot configure 5.1 audio. No matter what audio
> output device I set, the "Digital Audio Capabilities" menu remains greyed
> out, and the speaker configuration fixed at Stereo.
>
> I get audio out of the receiver, but only 2 channels.
>
> I've run mythfrontend -v audio and there are a gazillion audio devices but
> *all* are 2.0. Of these, 3 audio devices seem to suggest that they
> understand multi-channel digital audio. These are reported as (after an
> audio device scan):
>
> 2022-05-31 22:40:32.806995 I  Found ALSA:plughw:CARD=PCH,DEV=3 (HDA Intel
> PCH, HDMI 0
> Hardware device with all software conversions (marantz-AVR connected to
> HDMI)
> Device supports up to 2.0 (LPCM, AC3, DTS, E-AC3, DTS-HD, TrueHD))
>
> 2022-05-31 22:40:32.515369 I  Found ALSA:hw:CARD=PCH,DEV=3 (HDA Intel PCH,
> HDMI 0
> Direct hardware device without any conversions (marantz-AVR connected to
> HDMI)
> Device supports up to 2.0 (LPCM, AC3, DTS, E-AC3, DTS-HD, TrueHD))
>
> 2022-05-31 22:40:32.104090 I  Found ALSA:hdmi:CARD=PCH,DEV=0 (HDA Intel
> PCH, HDMI 0
> HDMI Audio Output (marantz-AVR connected to HDMI)
> Device supports up to 2.0 (LPCM, AC3, DTS, E-AC3, DTS-HD, TrueHD))
>
> I've tried all three (plus many others) without success. For reference,
> the logs prior to each are identical:
> 2022-05-31 22:40:32.089221 I  AOS: Sample rate 32000 is supported
> 2022-05-31 22:40:32.089225 I  AOS: Sample rate 44100 is supported
> 2022-05-31 22:40:32.089228 I  AOS: Sample rate 48000 is supported
> 2022-05-31 22:40:32.089231 I  AOS: Sample rate 88200 is supported
> 2022-05-31 22:40:32.089233 I  AOS: Sample rate 96000 is supported
> 2022-05-31 22:40:32.089236 I  AOS: Sample rate 176400 is supported
> 2022-05-31 22:40:32.089239 I  AOS: Sample rate 192000 is supported
> 2022-05-31 22:40:32.089241 I  AOS: Format signed 16 bit is supported
> 2022-05-31 22:40:32.089243 I  AOS: Format signed 32 bit is supported
> 2022-05-31 22:40:32.089249 I  AOS: 2 channel(s) are supported
> 2022-05-31 22:40:32.089255 I  AOS: 4 channel(s) are supported
> 2022-05-31 22:40:32.089259 I  AOS: 6 channel(s) are supported
> 2022-05-31 22:40:32.089264 I  AOS: 8 channel(s) are supported
> 2022-05-31 22:40:32.089406 I  ALSA: Successfully retrieved ELD data
> 2022-05-31 22:40:32.089412 I  ELDUTILS: Detected monitor marantz-AVR at
> connection type HDMI
> 2022-05-31 22:40:32.089416 I  ELDUTILS: available speakers: FL/FR LFE FC
> RL/RR RC RLC/RRC
> 2022-05-31 22:40:32.089418 I  ELDUTILS: max LPCM channels = 8
> 2022-05-31 22:40:32.089419 I  ELDUTILS: max channels = 8
> 2022-05-31 22:40:32.089422 I  ELDUTILS: supported codecs = LPCM, AC3, DTS,
> E-AC3, DTS-HD, TrueHD
> 2022-05-31 22:40:32.089430 I  ELDUTILS: supports coding type LPCM:
> channels = 8, rates = 32000 44100 48000 96000 176400 192000, bits = 16 20 24
> 2022-05-31 22:40:32.089433 I  ELDUTILS: supports coding type AC3: channels
> = 6, rates = 32000 44100 48000, max bitrate = 640000
> 2022-05-31 22:40:32.089436 I  ELDUTILS: supports coding type DTS: channels
> = 6, rates = 44100 48000 96000 176400, max bitrate = 1536000
> 2022-05-31 22:40:32.089438 I  ELDUTILS: supports coding type E-AC3:
> channels = 8, rates = 44100 48000
> 2022-05-31 22:40:32.089441 I  ELDUTILS: supports coding type DTS-HD:
> channels = 8, rates = 44100 48000 96000 176400 192000
> 2022-05-31 22:40:32.089443 I  ELDUTILS: supports coding type TrueHD:
> channels = 8, rates = 44100 48000 96000 176400 192000
> 2022-05-31 22:40:32.104076 I  AOBase: Killing AudioOutputDSP
> 2022-05-31 22:40:32.104078 I  AOBase: m_outputSettings !=
> m_outputSettingsDigital : 0
> 2022-05-31 22:40:32.104079 I  AOBase: m_outputSettingsRaw !=
> m_outputSettings 0
>
> ...which seems OK to me.
>
> I installed VLC on the same box and played some sample videos with various
> multi-channel digital audio formats. All played audio out of all 5.1
> speakers correctly and VLC reported as much.
>
> Note also that I already have another mythtv box (2015 vintage) running 32
> fixes on Ubuntu desktop 20.04 which plays multi-channel digital through the
> same receiver (and TV) fine. This box has an nVidia GT610 graphics card
> with HDMI out.
>
> Does anyone have any idea of what may be wrong with my setup?
>
>
> Thanks,
> Justin.
>

Just for comparison I have a  mythtv V32 system on:
OS: Kubuntu 22.04 LTS x86_64
Kernel: 5.15.0-33-generic
Resolution: 3840x2160
DE: Plasma 5.24.4
Manufacturer: ASUSTeK COMPUTER INC.
Product Name: PRIME B460M-A
CPU: Intel i3-10100 (8) @ 4.300GHz
GPU: Intel CometLake-S GT2 [UHD Graphics 630]
Memory: 2674MiB / 15848MiB

My system is connected over HDMI to my Samsung TV.  The receiver is fed by
a SPDIF optical cable from the TV out. I have 5.1 Audio. I first made sure
I had 5.1 setup on my Kubuntu 22.04 settings and had it working on all 5
channels.  Then in mythfrontend setup, I set the check boxes for digital
capability for Dolby and DTS.  Then I set up 5.1 instead of stereo.

Jim A
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