On Wed, Jan 6, 2010 at 3:41 AM, An St <vit.b12@xxxxxxxxx> wrote: > On Tue, Jan 5, 2010 at 8:59 PM, Jamie Lokier <jamie@xxxxxxxxxxxxx> wrote: >> James Shatto wrote: >>> On Tue, 5 Jan 2010 01:07:21 +0300 >>> An St <vit.b12@xxxxxxxxx> wrote: >>> >>> > Hello! >>> > >>> > Please help. I can't get working microphone at HDMI output. >>> >>> HDMI audio normally has some sort of limit in place. For my ATI >>> HD4550 video card, the audio has to be transmitted in an AC3 codec(5.1 >>> surround). AKA compressed, it will not work with PCM audio which >>> might be where your making a connection is giving you trouble. That >>> capability might depend on your graphics card, but that's the quirk of >>> mine. Assuming that your HDMI audio is provided via a graphics card. >>> >>> Maybe alsa can handle the AC3 conversion transparently / internally, >>> or NOT. It's seems a bit destined for problems IMO, so I just avoid >>> the issue with an RCA cable from a dedicated soundcard. Fortunately >>> my HDTV has a channel with HDMI/DVI input and RCA audio input so >>> running that machine on a 42" display is possible. >>> >>> If my graphics card does handle PCM audio over HDMI, it's probably >>> limited to 2 channels, 48kHz, 16 bit, and all that jazz. Maybe even >>> 44.1kHz. I really haven't checked the specs that recently on it. >>> But I only have one receiving device for HDMI audio (HDTV) so it's >>> not a priority to explore for me. Which is kind of ironic since the >>> audio device registers and an hda-intel device. AKA high definition >>> audio. But the limits are listed in the manual. Not that I've >>> looked at it in the past year+. >> >> Normally it is the HDMI receiving device (i.e. the TV/monitor) which >> determines which audio formats can be sent, and you should be able to >> send any of the major standard compressed formats if the receiving >> device accepts them. >> >> The EDID data, read from the TV/monitor over DDC, tells the sender >> (i.e. graphics card + drivers + X + apps) what formats it accepts. >> >> It is very similar to the way EDID tells the sender what video formats >> it accepts. >> >> -- Jamie >> > > There is audio at LCD TV from any ALSA-programs, but not from microphone. > I think it does not a audio format problem. > Also, I can hear microphone only at anolog output. > Problem is in forwarding microphone signal to HDMI. > Is it possible send voice from microphone to SPDIF output ? ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
