CD digital playback in Linux, is it possible?

Dusan · 08-20-2002, 03:46 AM

I was just wondering is it possible to use digital CD playback for playing audio CDs like in Windows or I'll have to install that audio cable that connects CD and sound card?

dai · 08-20-2002, 04:16 AM

that should work in linux also as its hardware driven i.e. the motherboard passess the signal from the cd-rom to the sound card which carries out the digital signal processing and passess the signal to the speakers.

I dont think the OS will have any real effect on this! you need a sound card capable of dsp via the mobo

But if Im wrong please correct me

MasterC · 08-20-2002, 04:50 AM

Nope, you are absolutely correct, at least on the fact that it will work. I have the digital cable from the DVD drive to the Sound card, and it works no problem. Nothing special enabled, it just works.

Dusan · 08-20-2002, 05:14 AM

Ok, I know it will work with digital cable, but will it work with no cable except IDE cable? You know, CD reads audio CD like it's data CD, and sends data through motherboard and PCI bus to the sound card and then sound card proceses that data and passes signal to the speakers.

dai · 08-20-2002, 05:35 AM

I believe it does as I stated in my previous post it should be down to the sound card that you have as to whether it is capable of this or not i.e. its a hardware issue not an O/S Specific issue

I cannot guarantee that it will work because I havent tried it myself but it should be OK. Try it and let us know

Hope this helps

Dusan · 08-20-2002, 08:25 AM

It doesn't work. Sound card is via 8233a ac97 and it works fine in WinXP when I check digital CD playback, but in Linux there isn't option like that, or I haven't find any. Ok, and I think that it's not OS specific, but maybe program (player) specific.
Ok, thanx anyway, I'll keep trying to make it work, onyonw else feel free to help me.

dai · 08-20-2002, 08:29 AM

Well if thats the case have you tried mplayer, a lot of people on this forum think its a great media player, but you would need to check if it'll play Digital audio through the mobo!!!

acid_kewpie · 08-20-2002, 02:02 PM

well this is a kernel issue, not at all application specific (... yes, even though i worship MPlayer, it's irrelevant here), and AFAIK it is not possible yet, will probably be in 2.6 branch though.

MasterC · 08-21-2002, 11:17 AM

Acid, it works fine for me though. I have a cable running from the digital out on my DVD to the digital in on my SBLive card. Is it working through the IDE cables then, if the digital cable isn't working?

I am really not questioning your knowledge buddy, I am wondering how I made mine work (and in Slack at that!) without doing anything special. A simple modprobe emu10k1 is as far as I have had to go with sound (oh and chmod /dev/dsp for users). That's it though, I think anyway.

Thanks for any thoughts, ideas, accusations (you can call me a liar if you wish), possible fixes, reasons, anything. Because now I am very curious.

Thanks everyone

dai · 08-23-2002, 02:37 AM

I think MasterC its because you have tha cable running from your sound card to the DVD rom drive its working. If that cable wasnt installed I dont think it would work (seeing as its not supported by the 2.4.x Kernel)

MasterC · 08-23-2002, 03:40 AM

Ok, so he is referring to the IDE sound pass, rather than the digital cable sound pass.

acid_kewpie · 08-23-2002, 04:08 AM

MasterC, he does state a number of times that the data goes over IDE, and NOT through another channel. the digital cable you have is exactly the same principle as the older analog audio cable, just a different type of data.

MasterC · 08-23-2002, 04:33 AM

<---- Very non-observant, thanks for pointing that out to me Acid, I just went through and re read the post. He sure does.

Thanks

dai · 08-23-2002, 04:35 AM

I believe so, yes