It depends on the capture card that is being used. The PVR-x50/AverMedia M179, and other cards supported by the ivtv driver do not require a seperate cable for audio because the the sound is captured as part of the MPEG-2 stream.
However, cards controlled by the bttv driver (which are essentially frame grabbers) require some sort of sound capture. Some cards work with btaudio, which generates a sound device (/dev/dspx, where x is a number) that MythTV can read from for the sound. Cards that don't support btaudio require a connection to a sound card, so for every bttv card you have that does not support btaudio, you require a sound card, with a cable connecting the capture card to the sound card (on the Line-In port). It is possible to have multiple sound cards in a PC, as long as you have enough PCI slots for them. This tends to be a problem for people with bttv cards, since you wind up with two problems - bttv cards require a lot more CPU than a PVR-x50 card, and you'll run out of PCI slots quickly. -- Joe --- Robin Smith <[EMAIL PROTECTED]> wrote: > I have no cable from my tuner card to my soundcard. > The tuner card > "captures" the audio along with the video. The > soundcard is only for > playback. > > > On Thu, 13 Jan 2005 14:15:52 +1100, Phill Edwards > <[EMAIL PROTECTED]> wrote: > > I currently have a bt878 chip tuner card and I > want to buy a 2nd one > > but I don't understand how the sound recording can > possibly work on > > this setup. From what I understand at the moment, > the sound gets > > recorded by connecting a lead from the sound out > from the tuner card > > to the line in of the sound card (which in my case > is on-board). If > > that lead is not connected in this way then I'll > get a video recording > > with no sound. Am I right so far? > > > > So, when I put a 2nd tuner card in how do I > connect the sound out to > > the line in of the sound card when it's already > been taken up by the > > 1st tuner card? Is this when you need btaudio? I > believe not all tuner > > cards support btaudio. How can I determine which > do and which don't - > > from what I've seen it seems to just be some > Hauppauges and WinTV > > Radio? > > > > Are my options as follows: > > > > 1) Buy a sound card when I buy a tuner card, OR > > 2) Buy a tuner card that supports btaudio (very > limited choice and > > expensive, I believe) > > > > Lastly, my mobo has a S/PDIF connector which I > currently have no idea > > how to use but I do want to get Dolby digital > working in the future > > for DVD playback. Does this have any bearing on > what sort of sound > > card I should buy if I go for option 2? > > > > Regards, > > Phill > > > > > > _______________________________________________ > > mythtv-users mailing list > > [email protected] > > > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users > > > > > > > > _______________________________________________ > mythtv-users mailing list > [email protected] > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users > __________________________________ Do you Yahoo!? The all-new My Yahoo! - Get yours free! http://my.yahoo.com
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