Hi guys,<br><br>Sorry to post yet another audio question, but I've spent countless hours trying to figure this out with no luck. I just built my first Mythbuntu 9.04 box, with the onboard sound passing audio to the Nvidia 9500GT card via SPDIF. I ran an HDMI cable from the Nvidia card to the TV. HDMI audio is working fine when I watch Flash apps like Hulu and YouTube in Firefox, but I can't seem to get audio working in MythTV. I've tried every combination of settings I could think to try on the audio configuration page, but nothing seems to work. I also ran alsamixer to make sure that all channels were unmuted. This is my first MythTV install, and so I'm wondering if I've missed something simple :)<br>
<br>Here are the current audio settings I'm using:<br><br>Audio output device: ALSA:spdif (I've tried all the other ones too)<br>Passthrough output device: ALSA:iec958:{ AES0 0x02 }<br>Max Audio Channels: 5.1<br>
Upmix: Passive<br>
Enable AC3 to SPDIF passthrough (checked)<br>Enable DTS to SPDIF passthrough (checked)<br>Agressive Sound card Buffering (unchecked)<br>Use internal volume controls (unchecked)<br><br>I've used two different /etc/asound.conf files. Both work fine with Flash/Firefox, but neither made a difference in MythTV.<br>
<br><br>File 1:<br><br>pcm.!default {<br> type plug<br> slave {<br> rate 48000<br> pcm "spdif"<br> }<br>}<br><br><br>File 2:<br><br>pcm.!default {<br> type hw<br>
card 0<br> device 0<br>}<br><br><br>root@mythtv-backend:/etc# aplay -L<br>front:CARD=SB,DEV=0<br> HDA ATI SB, ALC883 Analog<br> Front speakers<br>surround40:CARD=SB,DEV=0<br> HDA ATI SB, ALC883 Analog<br>
4.0 Surround output to Front and Rear speakers<br>surround41:CARD=SB,DEV=0<br> HDA ATI SB, ALC883 Analog<br> 4.1 Surround output to Front, Rear and Subwoofer speakers<br>surround50:CARD=SB,DEV=0<br> HDA ATI SB, ALC883 Analog<br>
5.0 Surround output to Front, Center and Rear speakers<br>surround51:CARD=SB,DEV=0<br> HDA ATI SB, ALC883 Analog<br> 5.1 Surround output to Front, Center, Rear and Subwoofer speakers<br>surround71:CARD=SB,DEV=0<br>
HDA ATI SB, ALC883 Analog<br> 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers<br>iec958:CARD=SB,DEV=0<br> HDA ATI SB, ALC883 Digital<br> IEC958 (S/PDIF) Digital Audio Output<br>null<br> Discard all samples (playback) or generate zero samples (capture)<br>
root@mythtv-backend:/etc#<br><br><br>Thanks so much for any help!<br><br>Sincerely,<br><br>-Laura<br><br><br>