14 Mar
2009
14 Mar
'09
10:12 a.m.
Hello everyone!
I have a file, which is supposedly surroundsound, at least the site says so
and I have no reason to doubt them. But when I open it with mplayer, it tells
me, that there are only 2 channels:
AUDIO: 44100 Hz, 2 ch, s16le, 192.0 kbit/13.61% (ratio: 24000->176400)
So how can I grab the different channels, to make a binaural version of it.
I seem to remember that csound should be capable of that. But first of all I
need all the different channels. At least I suppose so?
If anyone wants to test a file, it's here:
http://www.wdr.de/radio/hoerspiel-surround/lautsprechertest192_44_16_vbr.wma
It's a small speaker test from their site.
Can anyone help me?
Kindest regards
Julien
--------
Music was my first love and it will be my last (John Miles)
======== FIND MY WEB-PROJECT AT: ========
http://ltsb.sourceforge.net
the Linux TextBased Studio guide
======= AND MY PERSONAL PAGES AT: =======
http://www.juliencoder.de
14 Mar
14 Mar
1:31 p.m.
Hello Julien,
Using OpenSuse 11.0 I was only able to open the file with VLC. The
Codec Details in the Information section in VLC says:
Codec: wmap
Type: Audio
Channels: 6
Sample Rate: 44100Hz
Bits per sample: 16
Bitrate: 192 kb/s
I'm not at my studio now so I don't have a multichannel setup to test
it but I've played DVD videos with multichannel audio before with VLC
and Jack. I don't know if VLC works the same with multichannel audio
files (I assume it will) since I'm trying now in my laptop and VLC
refuses to use Jack for some reason.
Cheers,
Hector
On Sat, Mar 14, 2009 at 9:12 AM, Julien Claassen <julien(a)c-lab.de> wrote:
Hello everyone!
I have a file, which is supposedly surroundsound, at least the site says so
and I have no reason to doubt them. But when I open it with mplayer, it tells
me, that there are only 2 channels:
AUDIO: 44100 Hz, 2 ch, s16le, 192.0 kbit/13.61% (ratio: 24000->176400)
So how can I grab the different channels, to make a binaural version of it.
I seem to remember that csound should be capable of that. But first of all I
need all the different channels. At least I suppose so?
If anyone wants to test a file, it's here:
http://www.wdr.de/radio/hoerspiel-surround/lautsprechertest192_44_16_vbr.wma
It's a small speaker test from their site.
Can anyone help me?
Kindest regards
Julien
--------
Music was my first love and it will be my last (John Miles)
======== FIND MY WEB-PROJECT AT: ========
http://ltsb.sourceforge.net
the Linux TextBased Studio guide
======= AND MY PERSONAL PAGES AT: =======
http://www.juliencoder.de
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user(a)lists.linuxaudio.org
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1:39 p.m.
Hello Hector!
Thanks for testing this. After some research about WMA and mplayer I
remembered something and found out, that mplayer just uses 2 channels by
default, but I can tell it to do the full 5.1 Now I must only convert this to
b-format and then to a binaural file somehow. :-) Piece of cake. :-)
Kindest regards and thanks
Julien
--------
Music was my first love and it will be my last (John Miles)
======== FIND MY WEB-PROJECT AT: ========
http://ltsb.sourceforge.net
the Linux TextBased Studio guide
======= AND MY PERSONAL PAGES AT: =======
http://www.juliencoder.de
1:37 p.m.
... forgot to add: yes, you can create a binaural version with Csound
using the older opcode or the better and recently added hrtf opcodes:
http://www.csounds.com/manual/html/hrtfstat.html
I've been using them to create binaural versions of my multichannel
pieces and it works pretty well. It's easy to put together a Csound
orchestra to process multiple mono files into a single stereo
binaural, I have one for 8 channels that I can post here if you are
interested.
Cheers,
Hector
On Sat, Mar 14, 2009 at 9:12 AM, Julien Claassen <julien(a)c-lab.de> wrote:
Hello everyone!
I have a file, which is supposedly surroundsound, at least the site says so
and I have no reason to doubt them. But when I open it with mplayer, it tells
me, that there are only 2 channels:
AUDIO: 44100 Hz, 2 ch, s16le, 192.0 kbit/13.61% (ratio: 24000->176400)
So how can I grab the different channels, to make a binaural version of it.
I seem to remember that csound should be capable of that. But first of all I
need all the different channels. At least I suppose so?
If anyone wants to test a file, it's here:
http://www.wdr.de/radio/hoerspiel-surround/lautsprechertest192_44_16_vbr.wma
It's a small speaker test from their site.
Can anyone help me?
Kindest regards
Julien
--------
Music was my first love and it will be my last (John Miles)
======== FIND MY WEB-PROJECT AT: ========
http://ltsb.sourceforge.net
the Linux TextBased Studio guide
======= AND MY PERSONAL PAGES AT: =======
http://www.juliencoder.de
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user(a)lists.linuxaudio.org
http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
1:41 p.m.
Sorry, just read the second...
Thanks for asking, but I won't be interested in 8channel conversion. But
maybe someone else. It is a topic occasionally arising.
I'm just interested in my 5.1 problem at the moment. But I'll have a look at
hrtfstat. I was thinking about the bformdec1 and bformenc1 codecs.
Kindest regards
Julien
--------
Music was my first love and it will be my last (John Miles)
======== FIND MY WEB-PROJECT AT: ========
http://ltsb.sourceforge.net
the Linux TextBased Studio guide
======= AND MY PERSONAL PAGES AT: =======
http://www.juliencoder.de
1:50 p.m.
Hi Julian,
Ah! OK so you want to create an ambisonic version, not a binaural one,
right? Yes, you can use the b-format encoders in Csound but I remember
having some problems with them and ended programing my own encoding
and decoding based on this
http://www.muse.demon.co.uk/ref/speakers.html Also you can use Fons'
LADSPA plugins and ambdec, which I'm sure you know about.
Cheers,
Hector
On Sat, Mar 14, 2009 at 12:41 PM, Julien Claassen <julien(a)c-lab.de> wrote:
Sorry, just read the second...
Thanks for asking, but I won't be interested in 8channel conversion. But
maybe someone else. It is a topic occasionally arising.
I'm just interested in my 5.1 problem at the moment. But I'll have a look
at hrtfstat. I was thinking about the bformdec1 and bformenc1 codecs.
Kindest regards
Julien
--------
Music was my first love and it will be my last (John Miles)
======== FIND MY WEB-PROJECT AT: ========
http://ltsb.sourceforge.net
the Linux TextBased Studio guide
======= AND MY PERSONAL PAGES AT: =======
http://www.juliencoder.de
2:21 p.m.
Hector!
No I wanted a binaural version, but I simply didn't think of just using
hrtf. I was so fixed on doing b-format and then converting to stereo, via some
formulas shown in the spat3d manual.
But I used hrtfstat now and it sounds fine. I wasn't sure though, what to do
the the .1 channel. I just mixed it in at 0 degress Azimuth and -80 degrees
elevation. I thought this was OK. I'll try comparing results.
Kindest regards
Julien
--------
Music was my first love and it will be my last (John Miles)
======== FIND MY WEB-PROJECT AT: ========
http://ltsb.sourceforge.net
the Linux TextBased Studio guide
======= AND MY PERSONAL PAGES AT: =======
http://www.juliencoder.de
10:51 p.m.
Julien Claassen a écrit :
Hello everyone!
I have a file, which is supposedly surroundsound, at least the site says so
and I have no reason to doubt them. But when I open it with mplayer, it tells
me, that there are only 2 channels:
AUDIO: 44100 Hz, 2 ch, s16le, 192.0 kbit/13.61% (ratio: 24000->176400)
just to add +0.5 cent..
my little knowledge on surround sound may be far outdated, but as far
as i know, "surround" sound has always been 2 channels (inner surround
channel is sort of "computed"). So, to me, mplayer reports something
right. Surround sound decoding can even be done with analog method.
So how can I grab the different channels, to make a
binaural version of it.
half reply: for inner surround channel retrieving, no real
standard.
just different (close) methods year over year. maybe some trademark or
label may help to find the appropriate method. But generaly, this is
more or less like:
Left = orig-left + surr-effect
Right = orig-right - surr-effect
surr-effect depends on l, r, context.
The real problem is to know the signification of the content of the
surround part in order to do something relevant with it for the binaural
(or other) purpose.
I seem to remember that csound should be capable of
that. But first of all I
need all the different channels. At least I suppose so?
If anyone wants to test a file, it's here:
http://www.wdr.de/radio/hoerspiel-surround/lautsprechertest192_44_16_vbr.wma
It's a small speaker test from their site.
Can anyone help me?
Kindest regards
Julien
10:56 p.m.
Hello Ben!
Thanks for replying. the problem is solved.
1. the file did have 6 channels (only need to add -channels 6)
2. Then the question of how to get the binaural file is rather simple. In the
csound manual there's a description of a typical 5.1 speaker setup.
Only if you ever need to mangle 5.1 again.
Kindest regards
Julien
--------
Music was my first love and it will be my last (John Miles)
======== FIND MY WEB-PROJECT AT: ========
http://ltsb.sourceforge.net
the Linux TextBased Studio guide
======= AND MY PERSONAL PAGES AT: =======
http://www.juliencoder.de
11:04 p.m.
Julien Claassen a écrit :
Hello Ben!
Thanks for replying. the problem is solved.
1. the file did have 6 channels (only need to add -channels 6)
Ok, i was stuck to
old school analog surround of the 80's :-D
2. Then the question of how to get the binaural file
is rather simple.
In the csound manual there's a description of a typical 5.1 speaker setup.
Only if you ever need to mangle 5.1 again.
Kindest regards
Julien
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