28 Feb
2010
28 Feb
'10
3:54 p.m.
Arnold Krille <arnold(a)arnoldarts.de> wrote:
...
My rational is that most (all?) 5.1 mixes are: music
and action stuff on L+R
(front), dialogues on C, ambient and action effects on L+R(rear).
So my idea is to split the rear channels into six or more channels distributed
around the rear side of the circle (or even sphere) to have a more surrounding
feeling and overcome the hole in the panning.
Multiple surround speakers fed with the same
signal is what you hear in a cinema.
Recreating that would therefore seem to be a
useful path to go down.
Regards,
Martin
--
Martin J Leese
E-mail: martin.leese stanfordalumni.org
Web: http://members.tripod.com/martin_leese/
28 Feb
28 Feb
4:04 p.m.
New subject: 5.1 to ambisonices (was: more than 4 channels for listening? Really?)
On 02/28/2010 08:54 PM, Martin Leese wrote:
Arnold Krille<arnold(a)arnoldarts.de> wrote:
...
why not just pan the 5 signals on an ambi rig?
if you want to get rid of the hole in the panning (to the rear), you are
prepared to cheat anyways. in that case, it might be interesting to try
a sixth source in the rear, derived from summing SL and SR, maybe
including a few allpass filters for decorrelation...
My rational is that most (all?) 5.1 mixes are:
music and action stuff on L+R
(front), dialogues on C, ambient and action effects on L+R(rear).
So my idea is to split the rear channels into six or more channels distributed
around the rear side of the circle (or even sphere) to have a more surrounding
feeling and overcome the hole in the panning.
Multiple surround speakers fed with the same
signal is what you hear in a cinema.
Recreating that would therefore seem to be a
useful path to go down. 
1 Mar
1 Mar
4:46 a.m.
New subject: 5.1 to ambisonices (was: more than 4 channels for listening? Really?)
On Sunday 28 February 2010 21:03:48 Jörn Nettingsmeier wrote:
On 02/28/2010 08:54 PM, Martin Leese wrote:
That is the simpliest solution. But simply using the channels (after ambdec)
assumes your ambisonics speakers are at the positions 5.1 expects.
Doing so with panning-to-amb sets you free from that and even allows you to
rotate the set-up.
In that faust dsp file I also added a separate volume control for the center
channel, I found a 1:1 mix of that is to heavy.
The interesting part starts when you try to improve the sound within reason.
And thats where you use the rear-channels (which are normally used for ambient
in the movie) to create an ambient-half-sphere around you...
BTW: What to do with the LFE-channel? Add a lowpass and mix it directly on
'W'? Or ignore it altogether as all the other channels are full-range already?
Arnold Krille<arnold(a)arnoldarts.de>
wrote:
...
why not just pan the 5 signals on an ambi rig? My rational is that most (all?) 5.1 mixes are:
music and action stuff on
L+R (front), dialogues on C, ambient and action effects on L+R(rear). So
my idea is to split the rear channels into six or more channels
distributed around the rear side of the circle (or even sphere) to have
a more surrounding feeling and overcome the hole in the panning.
Multiple surround
speakers fed with the same
signal is what you hear in a cinema.
Recreating that would therefore seem to be a
useful path to go down. if you want to get rid of the hole in the panning (to
the rear), you are
prepared to cheat anyways. in that case, it might be interesting to try
a sixth source in the rear, derived from summing SL and SR, maybe
including a few allpass filters for decorrelation...
Hm, allpass-filters are something I haven't yet looked at at all. Will do so.
Currently I created six sources in the rear derived from the two rear-channels
of 5.1. Maybe I will also play with a bit of delay there to widen the space...
Next time I will post a compilable project instead of the single faust file.
Should make it easier for most people:-)
Have fun,
Arnold
5:50 a.m.
New subject: 5.1 to ambisonices (was: more than 4 channels for listening? Really?)
On 03/01/2010 09:45 AM, Arnold Krille wrote:
? what i meant is: drive your rig in ambisonics, and pan the 5.1 signal
as follows:
L -30°
C 0°
R 30°
SL -110°
SR 110
(using ardour as a mixer, five mono buses with an ambi panner in each,
and an ambi master bus.)
then you can do all kinds of funny things, regardless of how many
speakers you have and where they are.
individual volume controls included.
and if the hole in the rear makes you uneasy, create some rear-center
signal from SL and SR, maybe with a little delay, allpass and reverb...
(never tried it, though.)
why not just
pan the 5 signals on an ambi rig?
That is the simpliest solution. But simply using the channels (after ambdec)
assumes your ambisonics speakers are at the positions 5.1 expects.
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3 comments
3 participants
participants (3)
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Arnold Krille -
Jörn Nettingsmeier -
Martin Leese