Hello, all; I'm running Fedora Core 6 (with updates from Fedora and
ATRPMS) on a new x86_64 machine with an nForce 570 motherboard chipset,
and am passing SPDIF to an external receiver. Stereo's working fine,
but I can't get AC3 (or presumably DTS, though I haven't tried)
passthrough to work.
mplayer gives an error (for both ac3 audio files and DVDs) if I specify
"-ao alsa" (or alsa:device=iec958 or alsa:device=spdif), and if I
specify "-ao alsa:device=default", produces noise (in stereo); MythTV
with AC3 passthrough enabled and video-as-timebase disabled produces
similar noise -- though both work if I have them downsample to stereo
PCM. "speaker-test -c6" plays sound on the two front channels, with
silence on others. Everything I've tried produces either 2-channel
stereo, noise, or silence.
I *have* successfully passed AC3 audio from a different machine to this
receiver in the past, so it's not a decoding issue. I'm stuck; any
ideas? Is this chipset simply not fully supported?
I've attached all of the random data I can think of below; I'd be happy
to provide more info...
-spc
----- Installed RPMS (alsa-lib is from ATRPMS) -----
kernel-2.6.18-1.2849.fc6
alsa-lib-1.0.13-32.fc6.at
alsa-utils-1.0.12-3.fc6
----- "mplayer -ac alsa -ao hwac3, test.ac3" (or dvd://)-----
Forced audio codec: hwac3
Opening audio decoder: [hwac3] AC3/DTS pass-through S/PDIF
No accelerated IMDCT transform found
hwac3: switched to AC3, 448000 bps, 48000 Hz
AUDIO: 48000 Hz, 2 ch, ac3, 448.0 kbit/29.17% (ratio: 56000->192000)
Selected audio codec: [hwac3] afm: hwac3 (AC3 through S/PDIF)
==========================================================================
alsa-lib: confmisc.c:1105:(snd_func_refer) Unable to find definition
'cards.HDA-
Intel.pcm.iec958.1:CARD=0,AES0=6,AES1=130,AES2=0,AES3=2'
alsa-lib: conf.c:3500:(_snd_config_evaluate) function snd_func_refer
returned error: No such file or directory
alsa-lib: conf.c:3968:(snd_config_expand) Evaluate error: No such file
or directory
alsa-lib: pcm.c:2143:(snd_pcm_open_noupdate) Unknown PCM iec958
alsa-init: playback open error: No such file or directory
Could not open/initialize audio device -> no sound.
----- "aplay -l" -----
**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 0: AD198x Analog [AD198x Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 1: AD198x Digital [AD198x Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
----- dmesg -----
hda_codec: Unknown model for AD1988, trying auto-probe from BIOS...
----- lspci -----
00:06.1 Audio device: nVidia Corporation MCP55 High Definition Audio
(rev a2)
Simple mixer control 'Headphone',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 39
Mono:
Front Left: Playback 39 [100%] [on]
Front Right: Playback 39 [100%] [on]
Simple mixer control 'PCM',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 255
Mono:
Front Left: Playback 191 [75%]
Front Right: Playback 191 [75%]
Simple mixer control 'Front',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 39
Mono:
Front Left: Playback 39 [100%] [on]
Front Right: Playback 39 [100%] [on]
Simple mixer control 'Front Line',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 0 [0%] [off]
Front Right: Playback 0 [0%] [off]
Simple mixer control 'Front Mic',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 0 [0%] [off]
Front Right: Playback 0 [0%] [off]
Simple mixer control 'Front Mic Boost',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 3
Front Left: 0 [0%]
Front Right: 0 [0%]
Simple mixer control 'Surround',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 39
Mono:
Front Left: Playback 0 [0%] [off]
Front Right: Playback 0 [0%] [off]
Simple mixer control 'Center',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 39
Mono: Playback 0 [0%] [off]
Simple mixer control 'LFE',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 39
Mono: Playback 0 [0%] [off]
Simple mixer control 'Side',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 39
Mono:
Front Left: Playback 0 [0%] [off]
Front Right: Playback 0 [0%] [off]
Simple mixer control 'Line',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 0 [0%] [off]
Front Right: Playback 0 [0%] [off]
Simple mixer control 'CD',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 31 [100%] [on]
Front Right: Playback 31 [100%] [on]
Simple mixer control 'Mic',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 0 [0%] [off]
Front Right: Playback 0 [0%] [off]
Simple mixer control 'Mic Boost',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 3
Front Left: 0 [0%]
Front Right: 0 [0%]
Simple mixer control 'IEC958',0
Capabilities: pvolume pswitch pswitch-joined
Playback channels: Front Left - Front Right
Limits: Playback 0 - 39
Mono:
Front Left: Playback 39 [100%] [on]
Front Right: Playback 39 [100%] [on]
Simple mixer control 'IEC958 Playback Source',0
Capabilities: enum
Items: 'PCM' 'ADC1' 'ADC2' 'ADC3'
Item0: 'PCM'
Simple mixer control 'Aux',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 0 [0%] [off]
Front Right: Playback 0 [0%] [off]
Simple mixer control 'Capture',0
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right
Limits: Capture 0 - 54
Front Left: Capture 39 [72%] [off]
Front Right: Capture 39 [72%] [off]
Simple mixer control 'Capture',1
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right
Limits: Capture 0 - 54
Front Left: Capture 39 [72%] [off]
Front Right: Capture 39 [72%] [off]
Simple mixer control 'Capture',2
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right
Limits: Capture 0 - 54
Front Left: Capture 39 [72%] [off]
Front Right: Capture 39 [72%] [off]
Simple mixer control 'Analog Mix',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 31 [100%] [off]
Front Right: Playback 31 [100%] [off]
Simple mixer control 'Input Source',0
Capabilities: enum
Items: 'Mic' 'Front Mic' 'Line' 'Front Line' 'CD' 'Aux' 'Mix'
Item0: 'Mic'
Simple mixer control 'Input Source',1
Capabilities: enum
Items: 'Mic' 'Front Mic' 'Line' 'Front Line' 'CD' 'Aux' 'Mix'
Item0: 'Mic'
Simple mixer control 'Input Source',2
Capabilities: enum
Items: 'Mic' 'Front Mic' 'Line' 'Front Line' 'CD' 'Aux' 'Mix'
Item0: 'Mic'
Simple mixer control 'Headphone',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 39
Mono:
Front Left: Playback 39 [100%] [on]
Front Right: Playback 39 [100%] [on]
Simple mixer control 'PCM',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 255
Mono:
Front Left: Playback 191 [75%]
Front Right: Playback 191 [75%]
Simple mixer control 'Front',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 39
Mono:
Front Left: Playback 39 [100%] [on]
Front Right: Playback 39 [100%] [on]
Simple mixer control 'Front Line',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 0 [0%] [off]
Front Right: Playback 0 [0%] [off]
Simple mixer control 'Front Mic',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 0 [0%] [off]
Front Right: Playback 0 [0%] [off]
Simple mixer control 'Front Mic Boost',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 3
Front Left: 0 [0%]
Front Right: 0 [0%]
Simple mixer control 'Surround',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 39
Mono:
Front Left: Playback 0 [0%] [off]
Front Right: Playback 0 [0%] [off]
Simple mixer control 'Center',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 39
Mono: Playback 0 [0%] [off]
Simple mixer control 'LFE',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 39
Mono: Playback 0 [0%] [off]
Simple mixer control 'Side',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 39
Mono:
Front Left: Playback 0 [0%] [off]
Front Right: Playback 0 [0%] [off]
Simple mixer control 'Line',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 0 [0%] [off]
Front Right: Playback 0 [0%] [off]
Simple mixer control 'CD',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 31 [100%] [on]
Front Right: Playback 31 [100%] [on]
Simple mixer control 'Mic',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 0 [0%] [off]
Front Right: Playback 0 [0%] [off]
Simple mixer control 'Mic Boost',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 3
Front Left: 0 [0%]
Front Right: 0 [0%]
Simple mixer control 'IEC958',0
Capabilities: pvolume pswitch pswitch-joined
Playback channels: Front Left - Front Right
Limits: Playback 0 - 39
Mono:
Front Left: Playback 39 [100%] [on]
Front Right: Playback 39 [100%] [on]
Simple mixer control 'IEC958 Playback Source',0
Capabilities: enum
Items: 'PCM' 'ADC1' 'ADC2' 'ADC3'
Item0: 'PCM'
Simple mixer control 'Aux',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 0 [0%] [off]
Front Right: Playback 0 [0%] [off]
Simple mixer control 'Capture',0
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right
Limits: Capture 0 - 54
Front Left: Capture 39 [72%] [off]
Front Right: Capture 39 [72%] [off]
Simple mixer control 'Capture',1
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right
Limits: Capture 0 - 54
Front Left: Capture 39 [72%] [off]
Front Right: Capture 39 [72%] [off]
Simple mixer control 'Capture',2
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right
Limits: Capture 0 - 54
Front Left: Capture 39 [72%] [off]
Front Right: Capture 39 [72%] [off]
Simple mixer control 'Analog Mix',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 31 [100%] [off]
Front Right: Playback 31 [100%] [off]
Simple mixer control 'Input Source',0
Capabilities: enum
Items: 'Mic' 'Front Mic' 'Line' 'Front Line' 'CD' 'Aux' 'Mix'
Item0: 'Mic'
Simple mixer control 'Input Source',1
Capabilities: enum
Items: 'Mic' 'Front Mic' 'Line' 'Front Line' 'CD' 'Aux' 'Mix'
Item0: 'Mic'
Simple mixer control 'Input Source',2
Capabilities: enum
Items: 'Mic' 'Front Mic' 'Line' 'Front Line' 'CD' 'Aux' 'Mix'
Item0: 'Mic'
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