ok hate to post this but not finding what I'm looking for (and I searched for awhile).

I want to enable AC-3 pass through for dvd's (and eventualy hdtv). currently all audio is getting sent to my reciever through my SB Audigy spdif port (by default in knoppmyth), but when I start a dvd its only playing PCM Dolby Surround, not digital AC-3.

I played around with the config file for mplayer with some things I've seen up here but no dice, am I missing something obious?

Using the latest release of knoppmyth..

any help would be greatly appreciated.

ps I would want to pass through any AC3 not just dvd..

what I'm using is
seems to work to pass dolby through, while decoding non ac3 content. This is my video command, for dvd I use xine. the hw=0,4 may not be right for your setup. see the digital sound howto on the wiki to find your hw address.

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still no joy.. I'm still working on it.. going to check my audio hardware tonight to be sure its not the culpret!

any other suggestions anyone has would be great

have you gone through the digital audio howto on the wiki?

http://www.knoppmythwiki.org/index.php? ... AudioHowTo

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yea not a complete noob I've been at this for 3 days now.. its getting very frustating!! lol

I've tried all combo of strings in mplayer.. xine says it can't find the audio, vlc craps out.. all I get is buzzing (like a helicopter) out of the speakers..

I checked windows and the audigy is passing through just fine, so I know its a config someplace and not hardware

I'm thinking about recompiling ALSA next, or giving up on my audigy and switching to the on board Asus A7N8X multi channel sound (I orderd the spdif bracket today as I need spdif in/out) seems the wiki and lots of people here have the nforce2 audio working.. as I said I can get pcm audio out but not AC3/DTS

aplay -l give me this

**** List of PLAYBACK Hardware Devices ****
card 0: Audigy [Audigy 1 [SB0090]], device 0: emu10k1 [ADC Capture/Standard PCM Playback]
Subdevices: 32/32
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
Subdevice #2: subdevice #2
Subdevice #3: subdevice #3
Subdevice #4: subdevice #4
Subdevice #5: subdevice #5
Subdevice #6: subdevice #6
Subdevice #7: subdevice #7
Subdevice #8: subdevice #8
Subdevice #9: subdevice #9
Subdevice #10: subdevice #10
Subdevice #11: subdevice #11
Subdevice #12: subdevice #12
Subdevice #13: subdevice #13
Subdevice #14: subdevice #14
Subdevice #15: subdevice #15
Subdevice #16: subdevice #16
Subdevice #17: subdevice #17
Subdevice #18: subdevice #18
Subdevice #19: subdevice #19
Subdevice #20: subdevice #20
Subdevice #21: subdevice #21
Subdevice #22: subdevice #22
Subdevice #23: subdevice #23
Subdevice #24: subdevice #24
Subdevice #25: subdevice #25
Subdevice #26: subdevice #26
Subdevice #27: subdevice #27
Subdevice #28: subdevice #28
Subdevice #29: subdevice #29
Subdevice #30: subdevice #30
Subdevice #31: subdevice #31
card 0: Audigy [Audigy 1 [SB0090]], device 2: emu10k1 efx [Multichannel Capture/PT Playback]
Subdevices: 8/8
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
Subdevice #2: subdevice #2
Subdevice #3: subdevice #3
Subdevice #4: subdevice #4
Subdevice #5: subdevice #5
Subdevice #6: subdevice #6
Subdevice #7: subdevice #7
card 0: Audigy [Audigy 1 [SB0090]], device 3: emu10k1 [Multichannel Playback]
Subdevices: 1/1
Subdevice #0: subdevice #0

cat /proc/asound/pcm..
00-00: emu10k1 : ADC Capture/Standard PCM Playback : playback 32 : capture 1
00-01: emu10k1 mic : Mic Capture : capture 1
00-02: emu10k1 efx : Multichannel Capture/PT Playback : playback 8 : capture 1
00-03: emu10k1 : Multichannel Playback : playback 1

I even tried upgrading mplayer here is its output for:
mplayer -ao help
MPlayer 1.0pre7try2-3.4.5 (C) 2000-2005 MPlayer Team
CPU: Advanced Micro Devices Athlon MP/XP/XP-M Barton (Family: 6, Stepping: 0)
Detected cache-line size is 64 bytes
CPUflags: MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 0
Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx SSE


Available audio output drivers:
mpegpes DVB audio output
oss OSS/ioctl audio output
nas NAS audio output
null Null audio output
pcm RAW PCM/WAVE file writer audio output

snip from standard out for mplayer..
[AO OSS] Can't set audio device /dev/dsp to ac3 output, trying s16le...

AO: [oss] 48000Hz 2ch s16le (2 bps)

Building audio filter chain for 48000Hz/2ch/ac3 -> 48000Hz/2ch/s16le...

[format] Sample format big-endian AC3 not yet supported

[libaf] Reinitialization did not work, audio filter 'format' returned error code -2

Couldn't find matching filter/ao format!

Its an Audigy one with a SPDIF daughter board

ok solved.. gave up on the audigy and went with the on board nforce2 surround sound..

was easy too.. werid that the audigy 1 was such a pita..

Thanks for the help!

If for some reason you wanted to use the autigy try searching the forums for helicopter, I seem to remember someone a while back with a problem they described using that same word. As I remember the thread did have a solution, though I'm not sure what.

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