Linux AudioEngine testers - Linux only
(2012-06-27, 18:26)frawau Wrote: Hi,

For what it's worth, here is what I got when running the new AE trying to get HD sound.

Hardware:
- A75M-UD2H Mobo with 8 GB
- AMD A6-3500 APU
- GT 630 with 2GB (Replaced my HD6870-based as per first post)
- Marantz SR6005 connected via HDMI

Software:
- Ubuntu 12.04. Boots directly into XBMC, no display manager, no pulse audio
- XBMC Frodo alphas 3 (wsnipex ppa)
- ALSA: kernel reports 1.0.24. utilities 1.0.25
- nvidia driver 295.49-0ubuntu0.1

AV material: (Accessed over NFSv4)
- Chicago V, 2 ch 192kHz 24 DVD-A rip FLAC
- Chicago V, 5.1 ch 96Khz DVD-A rip FLAC
- Various Ogg, FLAC
- In the line of fire BD rip, TrueHD and AC3 audio, mkv container

Initially, all my HD sounds were down-mixed to 48kHz, as it turned out I MUST boot my XBMC box when the receiver is on and XBMC box is the active input. Here is what I got when booting with the XBMC box not the selected channel on the receiver

Code:
[email protected]:~# cat /proc/asound/card1/eld#3.0
monitor_present         1
eld_valid               1
monitor_name            marantz-AVR

connection_type         HDMI
eld_version             [0x2] CEA-861D or below
edid_version            [0x3] CEA-861-B, C or D
manufacture_id          0x4935
product_id              0x1b
port_id                 0x20000
support_hdcp            0
support_ai              0
audio_sync_delay        0
speakers                [0x1] FL/FR
sad_count               1
sad0_coding_type        [0x1] LPCM
sad0_channels           2
sad0_rates              [0xe0] 32000 44100 48000
sad0_bits               [0xe0000] 16 20 24

As you can see:
- The receiver is detected and the brand recognized (Great!)
- The maximum sampling rate is 48 kHz (oops)


With the XBMC box booted whilst the selected input of the receiver I got:

Code:
[email protected]:~# cat /proc/asound/card1/eld#3.0
monitor_present         1
eld_valid               1
monitor_name            marantz-AVR

connection_type         HDMI
eld_version             [0x2] CEA-861D or below
edid_version            [0x3] CEA-861-B, C or D
manufacture_id          0x4935
product_id              0x1b
port_id                 0x20000
support_hdcp            0
support_ai              0
audio_sync_delay        0
speakers                [0x5f] FL/FR LFE FC RL/RR RC RLC/RRC
sad_count               7
sad0_coding_type        [0x1] LPCM
sad0_channels           8
sad0_rates              [0x1ee0] 32000 44100 48000 88200 96000 176400 192000
sad0_bits               [0xe0000] 16 20 24
sad1_coding_type        [0x7] DTS
sad1_channels           6
sad1_rates              [0x6c0] 44100 48000 88200 96000
sad1_max_bitrate        1536000
sad2_coding_type        [0x2] AC-3
sad2_channels           6
sad2_rates              [0xe0] 32000 44100 48000
sad2_max_bitrate        640000
sad3_coding_type        [0xb] DTS-HD
sad3_channels           8
sad3_rates              [0x1ec0] 44100 48000 88200 96000 176400 192000
sad4_coding_type        [0xa] E-AC-3/DD+ (Dolby Digital Plus)
sad4_channels           8
sad4_rates              [0xc0] 44100 48000
sad5_coding_type        [0xc] MLP (Dolby TrueHD)
sad5_channels           6
sad5_rates              [0x1ec0] 44100 48000 88200 96000 176400 192000
sad6_coding_type        [0xc] MLP (Dolby TrueHD)
sad6_channels           8
sad6_rates              [0x6c0] 44100 48000 88200 96000

Much better.

Result:

Various OGG,Flac: No problem
2 ch 192kHz: No problem
5.1 ch 96kHz: Worked good but XBMC frozen during one of the track change (system OK can ssh into it).
I saw that problem before, it is probably not an HD sound issue
AC3 : No problem
True HD : Does not work. The sound and image alternate between too slow and too fast. Changing the audio stream
to AC-3 solves the issues

I need to do some more testing: upgrade ALSA, downgrade NVidia

Anyway thanks guys, we are almost there.

François
Sure this is the same problem I had 3 posts before, no. 372. I have to boot my XBMC box at the same time as turning on my AVR otherwise HD audio does not play at all!
Guide to building an all in one Ubuntu Server - TV(vdr),File,Music,Web

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Messages In This Thread
Almost there, but still no HD - by OkvOkv - 2012-04-17, 03:54
AudioEngine testers - Linux only - by Ritzie - 2012-05-12, 18:36
RE: AudioEngine testers - Linux only - by charlie0440 - 2012-06-27, 21:59


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