Show Posts
1
Installation issues / Re: SPDIF / Analog Audio
« on: September 15, 2007, 07:35:02 am »
When you play a movie, the sound card actually doesn't do the 5+1 channel encoding, the 5+1 channel information comes direct from the DVD through the spdif cable.
It is quite likely that the audio source (such as a recorded TV show via tvtuner card or mp3/cd audio) was originally only 2 channels. Your receiver is only getting 2 channels because the linux driver cannot convert a 2 channel audio signal into 6/7/8 channels on the fly. In order to do this, a technology similar to this is required:
http://www.dolby.com/consumer/technology/dolby_live.html
There was at one time a sound card that actually did this: nVidia Soundstorm on the nforce2 chipset (MCP-T) and the original X-Box (I think). Creative labs never did Dolby Digital Live. Some new variations of the cmedia chipset can also do this, but only on XP as far as I'm aware:
http://www.cmedia.com.tw/?q=en/dolby_live
A driver was available for both Windows XP and Linux for the nFoce2 SoundStorm MCP-T (No driver is available for Vista and no driver that I'm aware does it in ALSA - nVidia provided source? binary blobs? for OSS and as far as I'm aware the driver didn't work in OSS v4).
Does anyone know if it's possible to apt-get oss v3.x and the driver anymore?
It is quite likely that the audio source (such as a recorded TV show via tvtuner card or mp3/cd audio) was originally only 2 channels. Your receiver is only getting 2 channels because the linux driver cannot convert a 2 channel audio signal into 6/7/8 channels on the fly. In order to do this, a technology similar to this is required:
http://www.dolby.com/consumer/technology/dolby_live.html
There was at one time a sound card that actually did this: nVidia Soundstorm on the nforce2 chipset (MCP-T) and the original X-Box (I think). Creative labs never did Dolby Digital Live. Some new variations of the cmedia chipset can also do this, but only on XP as far as I'm aware:
http://www.cmedia.com.tw/?q=en/dolby_live
A driver was available for both Windows XP and Linux for the nFoce2 SoundStorm MCP-T (No driver is available for Vista and no driver that I'm aware does it in ALSA - nVidia provided source? binary blobs? for OSS and as far as I'm aware the driver didn't work in OSS v4).
Does anyone know if it's possible to apt-get oss v3.x and the driver anymore?