Talk:Configuring Digital Sound

From MythTV Official Wiki
Jump to: navigation, search

Hi, I have a perculiar problem with MythTV and ALSA. I have MythTV backend and frontend on the same machine, that also acts as a server, so it's on 24/7. The machine is based on the Asus P5B-E motherboard which utilizes Intel High Definition Audio (HDA) sound. I have set up digital sound and connected the SPDIF signal to my surround receiver (Marantz SR-5600). When ever I watch a recording right after turning on the receiver, the sound has lost sync, so the sound is enveloped in digital noise. I can hear the sound, but it's extremely noisy. Restarting ALSA solves this problem. I do however find it slightly cumbersome restarting ALSA everytime, I want to watch a recording. So far I haven't encountered this issue when fx. playing a DVD with Mplayer right after turning on the receiver. Can anyone help me avoid this loss-of-sync issue? --Cthulhu 06:09, 15 June 2007 (UTC)

I have edited the section on the PVR-350 because I believe that MythTV does not use the PVR-350 to decode any old MPEG file. In particular, I know it doesn't for DVD-Video. I don't think the PVR-350 can decode the AC3 audio found in most (all?) region 1 Video DVDs, since it uses MPEG audio internally instead. Although a PVR-350 can decode files it and other similar cards generated, it would be unreasonable to expect it to decode an arbitrary MPEG file, since such a file could be a Transport Stream instead of a Program Stream. It could contain image sizes outside the PVR-350's capabilities, such as 1920x1080 for HDTV. --Jonner 04:48, 9 November 2007 (UTC)

Removed the crazy pulseaudio warning. Pulseaudio is intended exactly for this application. Ubuntu screwed up the pulseaudio config in Hardy, but it's working in later revisions.