[mythtv-users] How Myth "sees" an audio device

[Jean-Yves Avenard]

On 17 April 2012 10:21, Pieter De Wit <pieter at insync.za.net> wrote:

> Hi JYA,
>
> I have the following for alsa:
>
> ii  alsa-base                              1.0.25+dfsg-0ubuntu1 ALSA driver
> configuration files
> ii  alsa-utils                             1.0.25-1ubuntu5 Utilities for
> configuring and using ALSA

that's irrelevant if the kernel module is 1.0.24 (cat /proc/asound/version)

You haven't provided the information I requested earlier (what
mythfrontend shows *exactly* in the audio setup screen)

so I can't help  much

>
> # cat /proc/asound/card*/eld#*.0
> monitor_present         0
> eld_valid               0
> monitor_present         1
> eld_valid               1
> monitor_name            SAMSUNG
>
> connection_type         HDMI
> eld_version             [0x2] CEA-861D or below
> edid_version            [0x3] CEA-861-B, C or D
> manufacture_id          0x2d4c
> product_id              0x4fb
> port_id                 0x20000
> support_hdcp            0
> support_ai              0
> audio_sync_delay        0
> speakers                [0x4f] FL/FR LFE FC RL/RR RLC/RRC
> sad_count               4
> sad0_coding_type        [0x1] LPCM
> sad0_channels           2
> sad0_rates              [0x6e0] 32000 44100 48000 96000 176400
> sad0_bits               [0xe0000] 16 20 24
> sad1_coding_type        [0x1] LPCM
> sad1_channels           8
> sad1_rates              [0x6e0] 32000 44100 48000 96000 176400
> sad1_bits               [0xe0000] 16 20 24
> sad2_coding_type        [0x2] AC-3
> sad2_channels           6
> sad2_rates              [0xe0] 32000 44100 48000
> sad2_max_bitrate        640000
> sad3_coding_type        [0x7] DTS
> sad3_channels           6
> sad3_rates              [0xe0] 32000 44100 48000
> sad3_max_bitrate        1536000
> monitor_present         0
> eld_valid               0
> monitor_present         0
> eld_valid               0
>
> I can't recall exactly what myth shows on the screen. I do remember "SAMSUNG
> connected via HDMI" and DTS and two others (I think it's the two/three on
> the left of the check box list in the audio config screen)

you would have seen LPCM, AC3 and DTS only.. As according to your amp
that's all it supports. No DTS-HD or TrueHD

> Lookung at that, it seems that the AMP is not advertising the correct
> support, like TrueHD etc ?

yep.
However, bear in mind that what is display on the frontend and what
the amp report has no impact on what myth will let you do. The data
provided is informative only.
If TrueHD/DTS-HD check-boxes aren't enabled it's more to do with you
configuring something preventing it to work. In the Advanced Audio
Settings, if you have 48k override or StereoPCM checked: it will
prevent TrueHD/DTS-HD to work (both those features require 8 channels,
192kHz support)

Having said that, what mythfrontend shows in the setup