Re: Sound card with supported digital out
On Sat, May 27, 2006 at 08:18:59PM +0200, Jan Johansson wrote: andrew fresh [EMAIL PROTECTED] wrote: I have tried one of those, I had forgotten about that. The problem with the USB digital output that I have tried is that it does not do AC3/DTS passthrough, all it does is output 2 channel PCM over the optical digital connection. I believe the one I tried was a Turtle Beach Audio Advantage Micro. If there is USB audio that will do AC3/DTS passthrough on OpenBSD, I would be happy with that. I have a Sinovoice UAC-05 which identifies like this uaudio0 at uhub0 port 2 configuration 1 interface 0: ABC C-Media USB Headphone Set, rev 1.10/1.00, addr 2 uaudio0: audio rev 1.00, 8 mixer controls audio0 at uaudio0 I found the Turtle Beach AudioAdvantage Micro that I tried before: uaudio0 at uhub0 port 1 configuration 1 interface 0: C-Media INC. USB Audio, rev 1.10/0.10, addr 2 uaudio0: audio rev 1.00, 4 mixer controls audio1 at uaudio0 and a Creative USB SoundBlaster Model SB0270: uaudio0: audio rev 1.00, 3 mixer controls audio1 at uaudio0 uhidev1 at uhub1 port 2 configuration 1 interface 3 uhidev1: Creative Labs USB Audio, rev 1.10/1.00, addr 2, iclass 3/0 uhid0 at uhidev1: input=3, output=3, feature=0 it is connected to my NAD T-760 receiver using a toslink (optical) cable. Mine connects to my Yamaha RX-V1400 through optical. In the following examples I use Gladiator (region 2). To get DTS on the receiver: To get Dolby Digital on the receiver: (On Shrek (region 1) I had to use -aid to get DTS.) I am trying an Xvid with AC3 5.1 encoded into it (the machine I have that can get close enough to the reciever doesn't have a DVD drive) doing $ mplayer file I get: == Opening audio decoder: [liba52] AC3 decoding with liba52 Using SSE optimized IMDCT transform AC3: 5.1 (3f+2r+lfe) 48000 Hz 448.0 kbit/s Using MMX optimized resampler AUDIO: 48000 Hz, 2 ch, s16le, 448.0 kbit/29.17% (ratio: 56000-192000) Selected audio codec: [a52] afm:liba52 (AC3-liba52) == which I believe means that it sees the file is AC3 5.1 but it is decoding it to 2ch s16le and outputting it to the headphone jack. when I $ mplayer -ac hwac3 file I get: == 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) == Mplayer claims it is converting it to 2ch AC3, but according to this, it is just lying: http://marc.theaimsgroup.com/?l=mplayer-usersm=114837108311020w=2 mplayer was throwing me a red herring by telling me it was playing 2-channel when in fact hwac3 was sending the full raw audio to the amp. So, I tried 2 different files, one with 5.1ch and one with 2ch. My reciever shows that it is recieving the correct number of channels depending on the file. Hope this helps. It did! It got me to try it again and I see now that It Just Works![1] I get AC3 passthrough working correctly with both sound cards. w00 h00! [1] unlike the linux box I have that claims to pass through AC3 but instead just sends garbage to the reciever. l8rZ, -- andrew - ICQ# 253198 - JID: [EMAIL PROTECTED] BOFH excuse of the day: We already sent around a notice about that.
Re: Sound card with supported digital out
andrew fresh [EMAIL PROTECTED] wrote: I have tried one of those, I had forgotten about that. The problem with the USB digital output that I have tried is that it does not do AC3/DTS passthrough, all it does is output 2 channel PCM over the optical digital connection. I believe the one I tried was a Turtle Beach Audio Advantage Micro. If there is USB audio that will do AC3/DTS passthrough on OpenBSD, I would be happy with that. I have a Sinovoice UAC-05 which identifies like this uaudio0 at uhub0 port 2 configuration 1 interface 0: ABC C-Media USB Headphone Set, rev 1.10/1.00, addr 2 uaudio0: audio rev 1.00, 8 mixer controls audio0 at uaudio0 it is connected to my NAD T-760 receiver using a toslink (optical) cable. In the following examples I use Gladiator (region 2). To get DTS on the receiver: mplayer dvd:// To get Dolby Digital on the receiver: mplayer -ac hwac3 -aid 128 dvd:// (On Shrek (region 1) I had to use -aid to get DTS.) -ac hwac3 tells mplayer to let the soundcard do the work and not do it in software. To find the aid (audio id) I run mplayer with -v and look for something like this. DVD successfully opened. [open] audio stream: 0 audio format: ac3 (5.1) language: en aid: 128 [open] audio stream: 1 audio format: dts (5.1) language: en aid: 137 [open] audio stream: 2 audio format: ac3 (stereo) language: en aid: 130 Hope this helps.
Re: Sound card with supported digital out
On Sat, May 20, 2006 at 05:46:42AM +0200, Jan Johansson wrote: andrew fresh [EMAIL PROTECTED] wrote: Is there a supported sound card that supports digital outputs? I think your best bet is USB audio. I have a simple USB audio stick that does optic digital signal or headphones under OpenBSD. I have tried one of those, I had forgotten about that. The problem with the USB digital output that I have tried is that it does not do AC3/DTS passthrough, all it does is output 2 channel PCM over the optical digital connection. I believe the one I tried was a Turtle Beach Audio Advantage Micro. If there is USB audio that will do AC3/DTS passthrough on OpenBSD, I would be happy with that. l8rZ, -- andrew - ICQ# 253198 - JID: [EMAIL PROTECTED] BOFH excuse of the day: wrong polarity of neutron flow
Sound card with supported digital out
Is there a supported sound card that supports digital outputs? I am trying to build a media pc that is similar to GeeXboX[2]. Pretty much just minimal system that will netboot and get mplayer running, but on an OS I like, OpenBSD :-) However, I want to be able to do AC3 and DTS passthrough and I am not sure if any digital audio out is supported on any cards in OpenBSD. Looking though the cards listed on i386.html[3] and searching the archives, I didn't find any support for digital outputs. On the SBLive! and Audigy cards that I have, emu(4)[1] claims not to support the S/PDIF. I do see that the Turtle Beach Santa Cruz is supposed to be supported by clcs(4)[4] and clcs(4) doesn't say that the S/PDIF out is not supported so I am not sure. Thank you for any information. [1] http://www.openbsd.org/cgi-bin/man.cgi?query=emuarch=i386sektion=4 [2] http://geexbox.org/ [3] http://www.openbsd.org/i386.html [4] http://www.openbsd.org/cgi-bin/man.cgi?query=clcsarch=i386sektion=4 l8rZ, -- andrew - ICQ# 253198 - JID: [EMAIL PROTECTED] BOFH excuse of the day: Your packets were eaten by the terminator
Re: Sound card with supported digital out
andrew fresh [EMAIL PROTECTED] wrote: Is there a supported sound card that supports digital outputs? I am trying to build a media pc that is similar to GeeXboX[2]. Pretty much just minimal system that will netboot and get mplayer running, but on an OS I like, OpenBSD :-) However, I want to be able to do AC3 and DTS passthrough and I am not sure if any digital audio out is supported on any cards in OpenBSD. I think your best bet is USB audio. I have a simple USB audio stick that does optic digital signal or headphones under OpenBSD.
