Hi, has anyone tried to encode dolby-surround sounds using csound, or in any
other ways?
I have 3 questions regarding this:

When encoding the surround channel, do you HAVE to phase-shift (+90/-90), or
is it equal to doing (0/-180)?
And do you have to use the Band pass filter when encoding the surround
channel? I guess every decent dolby-decoder uses a LP-filter for that channel
anyway.
Do you HAVE to use some dolby noise-reduction for the surround channel? When
using 100% digitally generated music (noise? ;), to deliver 100% digitally,
this would be obsolete, i guess.



.--- -- -  -
| Anders "Pipe/Nature" Andersson, pipe@algonet.se
:

> Hi, has anyone tried to encode dolby-surround sounds using csound, or in any

	you might try ambisonics-which seems to be much better than dolby

ambisonics page:
http://www.york.ac.uk/inst/mustech/3d_audio

Richard Furse's csound ambisonic Csound stuff:
http://www.muse.demon.co.uk/csound.html
	(which i had trouble expanding, but you might try..)

-matt