[Sursound] No more daily digest?

[Daniel Courville]

I subscribe to the "daily" digest, but it seems that it's now sent, well,
now and then.

I've just received one containing 34 messages. The one before that was on
October 1st with 45 messages. And the one before that was on September 6.

Am I the only one?


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[Sursound] Brahma in Zoom H2n

[Daniel Courville]

How/where to buy a Brahma retrofitted into a Zoom H2n?

Thanks,

Daniel


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Re: [Sursound] [OT] Unmixed multichannel spots

[Daniel Courville]

Le 2014-08-21 08:34, Michael Chapman a écrit:

>Does anyone know of any libraries of (say) four to eight-channel
>recordings of musical 'ensembles' (any style), that I could feed to a
>mixer desk and output as (e.g.) stereo ?
>(that is tracks from four or more spot mic's.)




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Re: [Sursound] Spheric Collection: The Largest Ambisonic Surround Sound Library

[Daniel Courville]

Le 2014-08-01 10:03, David Pickett a écrit :

>Which are the B-Format samples?  All I can find are descrubed as
>"Binaural Virtual Surround Sound -- use headphones for best results".

All of them: the binaural playback is for Internet preview only.

- Daniel


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[Sursound] Spheric Collection: The Largest Ambisonic Surround Sound Library

[Daniel Courville]

Well, here's the proof that B-Format is useful for TV and cinema
post-production.

http://spheric-collection.com


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[Sursound] www.michaelgerzonphotos.org.uk offline?

[Daniel Courville]

Seems that www.michaelgerzonphotos.org.uk is offline.

Maybe the website could be hosted on the same server as Ambisonia?


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Re: [Sursound] Ambisonic workflow with mac and Nuendo

[Daniel Courville]

Emanuele,


You can forget about the alpha version 2 of plug-ins, it seems they're
broken and they won't load in any hosts, Nuendo included.

As for the "old" version 1, I just got the intuition that if you tried to
load my plug-ins into Nuendo, but without having installed the
SonicBirth.framework at first, maybe they got blacklisted by Nuendo. So
now, even though you've installed the framework, the plug-ins are still on
Nuendo's blacklist.

While Nuendo is not running, verify that SonicBirth.framework is the
/library/framework directory.

After that, go into ~/Library/Preferences/Nuendo 5.5 directory and delete
the following files:
Vst2xBlacklist Nuendo (x86_64).xml
Vst2xBlacklist Nuendo.xml
Vst2xPlugins Nuendo (x86_64).xml
Vst2xPlugins Nuendo.xml


After that, go into ~/Library/Preferences/Nuendo 6 directory and delete
the following files:
Vst2xBlacklist Nuendo (x86_64).xml
Vst2xBlacklist Nuendo.xml
Vst2xPlugins Nuendo (x86_64).xml
Vst2xPlugins Nuendo.xml

This will force a rescan of all plug-ins.


The B2X plug-ins version 1 will only run in 32 bit, so be sure to set
Nuendo 5.5 and 6 to 32 bit.

Keep me posted,

Daniel


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Re: [Sursound] Ambisonic workflow with mac and Nuendo

[Daniel Courville]

Le 2014-07-08 04:43, Emanuele a écrit :

>Through Kickstarter I founded a Brahma microphone to have access to the
>Ambisonic technique and to play with it to learn how to use it.
>My main recorder is a Sound Devices 788T (which give me the option to
>listen to the stereo result when recording Ambisonic).

Not with the Brahma. SoundDevices multi-track recorders have a B-Format
stereo decoder, but the Brahma outputs A-Format, AFAIK.

For monitoring purposes on the 788T, you can route the Brahma capsules 1 &
3 to the left and 2 & 4 to the right.

As for the plug-ins, you can try mine! I'm also a Nuendo user.

http://www.ambisonicstudio.com


Cheers,

Daniel Courville


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Re: [Sursound] I despair, sometimes.

[Daniel Courville]

Le 2014-04-28 08:10, John Leonard a écrit :

>Makes me want to weep.

It's quite obvious from the comments you got from the Film Sound Design
list that they don't understand what B-Format is and what can be done with
it.

Education is the answer, I think. On that matter, I do what I can here in
Montreal with workshops for digital media artists or film/TV sound
production and post-production crews.

- Daniel


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Re: [Sursound] Inexpensive USB multichannel sound card

[Daniel Courville]

Le 2014-03-23 05:49, Alessandro Fogar a écrit :

>can you please suggest me an inexpensive USB multichannel sound card (8ch)
>to use in an installation ?
>
>If possible with drivers for Linux, Win, Mac.

There's this: 


The output is ADAT, but it could be of some use in certain context, ie
connecting to a digital mixer with ADAT in.

It's an USB 2 Class Compliant device, so no driver necessary on OS X and
Linux.

- Daniel


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Re: [Sursound] Soundfield 450 Mk2

[Daniel Courville]

Le 2014-03-20 08:57, Jon Honeyball a écrit :

>Pity this *still* doesn¹t have a 1K tone generator at say -20dB, allowing
>you to properly calibrate the input levels and replay of your recorder,
>which almost certainly doesn¹t have ganged controls. The Sounddevices 788T
>can do this, but others can¹t. Missed opportunity.

While ganged level controls are quite necessary for the SPS200 or the
TetraMic, the ST350/450/450 MkII output at line level and numerous input
devices, either portable or studio-dedicated, have fixed line level inputs.

- Daniel


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[Sursound] TSL SoundField new, and free, SurroundZone2

[Daniel Courville]

Supported Input Formats:
* A-Format (SPS200)
* B-Format

Supported Output Formats:

* Stereo (and Mono)
* 5.0, 5.1, 6.0, 6.1, 7.0, 7.1
* B-Format

Especially a good news for Pro Tools users as this makes the SurroundZone2
a good, free, B-Format manipulator.


Thanks to TSL and Pieter Schillebeeckx!

- Daniel


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Re: [Sursound] New Ambisonic VST Plugins

[Daniel Courville]

Le 2013-11-22 12:12, Richard Furse a écrit :

>you should
>also be able to upsample to third order using Svein's excellent HARPEX-B
>plugin, although the public version of that currently generates only
>horizontal components at third order (for compatibility with channel count
>limits in other hosts).

Is there a "non-public", beta, version that outputs the full 3rd order 16
channels?

- Daniel


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[Sursound] New native B-Format microphone!

[Daniel Courville]

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Re: [Sursound] brahma on kickstarter

[Daniel Courville]

Le 2013-10-24 10:16, umashankar manthravadi a écrit :

>the kickstarter project is now live
>http://www.kickstarter.com/projects/1569945514/brahma-affordable-ambisonic
>s-microphone umashankar

Hey! I can see my chin in the video!

- Daniel


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Re: [Sursound] Questions about support of .amb file (Wave based)

[Daniel Courville]

Le 2013-10-05 11:56 AM, Emanuele a écrit :

>Nuendo 10.2?
>
>On 05/10/2013 13:47, Augustine Leudar wrote:
>>
>>but in terms of higher orders on my version on nuendo 10.2 is the most
>>channels I could have on one bus( 12 channels)

There's a comma missing: "but in terms of higher orders on my version on
nuendo, 10.2 is the most channels I could have on one bus (12 channels)"



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Re: [Sursound] Questions about support of .amb file (Wave based)

[Daniel Courville]

Le 2013-10-02 06:50, Jörn Nettingsmeier a écrit :

>On 10/02/2013 12:11 PM, Yvan Grabit wrote:

>> 2) are there some Ambisonic plugins which could be use as Panners in
>>Nuendo ?
>
>daniel courville has an extensive set of plugins at
>http://www.radio.uqam.ca/ambisonic/b2x.html
>
>he may still be lurking on this list and maybe he can chime in,
>otherwise write to me off-list and i can put you in contact.

I'm still here, reading the list digest every day...

>the plugins are a bit weird in the way they are automated (last time i
>looked, it was x/y coordinates of the panner position in the GUI), and
>the way they model distance is not too useful, but they should get you
>going.

The x/y panner faking a circular panner was the way of getting around the
tools that were offered by the programming environment, SonicBirth.

As for the distance simulation, it's more of a tweak that serves my
stylistic needs (and, combined with a good reverb, it usually does the
trick, so I'm told).

In terms of integrating code with an other software, that probably won't
work, since SonicBirth-made plug-ins (up to the 1.3.1 version of SB) are
in fact written in XML and that XML talks to a centralized DSP engine,
/Library/Frameworks/SonicBirth.framework on OS X.

So Yvan, available right now, you have indeed the plug-ins made by Bruce
Wiggins and others mentioned. As for my part, my plug-ins will be
re-programmed using SonicBirth 2, which, beside exporting VSTs for OS X
and Windows, automatically codes in C++. That feature could mean easier
sharing and integration with other software.

And while we have a Cubase/Nuendo coder here, man, do I have problems with
the GUI in the 64-bit version of Nuendo on OS X. See this Nuendo forum
thread: <http://www.steinberg.net/forums/viewtopic.php?f=194&t=37094>.

Regards,

Daniel


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Re: [Sursound] ambi playback configution and calibration

[Daniel Courville]

Le 2013-09-19 15:50, David Worrall a écrit :

>Is there - on the market, or in other form - a setup system/tool that
>auto configures a decoder and calibrates an ambisonic playback rig
>according to the (actual) position of the loudspeakers?

I would say the Harpex decoder.




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Re: [Sursound] Ambisonics - Decoding 16 channels in DAW

[Daniel Courville]

Le 2013-07-03 06:37, Moritz Fehr a écrit:

>Any help would be greatly appreciated!

Two instances of Harpex-B, each one on a separate output bus, in shotgun
mode, each decoding to eight shotguns, using the "Cube" preset as a
starting point.

- Daniel


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Re: [Sursound] Nevaton microphones

[Daniel Courville]

Le 2013-05-30 13:53, Eric Benjamin a écrit :

>I always insist
>on recording 'Z', and then almost never end up using it...

Not even to "look" down or up in a stereo decode? I use the Z quite often
(if not always) when recording large ensemble and the SF mic is more than
10 feet off the floor.

- Daniel


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Re: [Sursound] Ambdec

[Daniel Courville]

Le 2013-05-16 09:27, Paul Power a écrit :

>anyway thanks, will keep trying

Well, there's this: .

- Daniel


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Re: [Sursound] what mics do you use?

[Daniel Courville]

Le 2013-04-29 16:07, Eric Benjamin a écrit :

>Calibration of Soundfield Microphones using the Diffuse-Field Response
>http://www.aes.org/tmpFiles/elib/20130429/16453.pdf
>
>A second-order soundfield microphone with improved polar pattern shape
>http://www.aes.org/tmpFiles/elib/20130429/16470.pdf

The links don't work. Other URLs?

Thanks,

Daniel


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Re: [Sursound] DVD-A:"Burn"

[Daniel Courville]

Le 2013-04-21 19:29, Michael Dunn a écrit :

>I just discovered Burn (free), which purports to supports DVD-A
>burning! Woo. Anyone have experience with this, or other, free DVD-A

Works well, makes DVD-Audio (no Blu-ray), so you need a player that
supports it, like the various universal players from Oppo and some other
brands.

Burn actually uses the binary from dvd-audio.sourceforge.net that Marc is
talking about.

- Daniel


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[Sursound] An April's Fool...

[Daniel Courville]

... that could be actually useful:




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Re: [Sursound] 64 Bit Ambisonic/B-Format AU plug-ins?

[Daniel Courville]

Le 2013-03-20 10:23, John Leonard a écrit:

>Are there any? (Aside form Harpex.) Looking for 1st order panners in
>particular.

I will update my plug-ins as soon as SonicBirth 2 is released: this new
version will make Mac AU/VST 32 and 64 bit plug-ins and Windows VST 32 bit
plug-ins. We're looking at first quarter 2014 though...

In the meantime, I have some alphas (B2Stereo, Tetra2B) and I could make a
Solo2B, but without a GUI: it would be sliders only.

- Daniel


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[Sursound] So, the SPS200 is inverting after all...

[Daniel Courville]

I thought that, since the SPS200 was not going through a SoundField
controller box, the mic signal would not be inverting, like what we have
with the B-Format output on vintage SF mics or even more recent models
like the ST350.

Well, the SPS 200 is inverting after all...






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[Sursound] First Pure Audio Blu-ray with 9.1 Auro-3D surround stream

[Daniel Courville]

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Re: [Sursound] higher order ambisonics over 8 to 10 loudspeakers

[Daniel Courville]

Le 2012-07-10 08:53, Garth Paine a écrit :

>So I guess as you suggest I could use one instance of Harpex for my main
>horizontal layout and then another instance with 2 or more shotguns
>raised in elevation to manage the height, depending on the available
>speakers

Certainly worth a try!

- Daniel


>On Jul 10, 2012, at 6:26 AM, Daniel Courville wrote:
>
>>Le 2012-07-09 09:17, GP a écrit :
>>>I did wonder about using Daniel Courville's plugins to do decoding for
>>>the height info separate to HARPEX. The HARPEX decoding does sound good
>>>(
>>>how can I confirm it is 3rd order over 8 speakers?) and so if I could
>>>add
>>>height using another approach that would be good. I need to look at how
>>>to get height only from Daniel's plugs.
>>The Harpex-B has a shotgun output mode with three presets for 3D:
>>Octahedron, 3D 7.0 and Cube. You can use them or build your own 3D
>>decoder
>>with virtual shotguns (eight maximum) to accommodate an ad hoc
>>installation.



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Re: [Sursound] higher order ambisonics over 8 to 10 loudspeakers

[Daniel Courville]

Le 2012-07-09 09:17, GP a écrit :

>I did wonder about using Daniel Courville's plugins to do decoding for
>the height info separate to HARPEX. The HARPEX decoding does sound good (
>how can I confirm it is 3rd order over 8 speakers?) and so if I could add
>height using another approach that would be good. I need to look at how
>to get height only from Daniel's plugs.

The Harpex-B has a shotgun output mode with three presets for 3D:
Octahedron, 3D 7.0 and Cube. You can use them or build your own 3D decoder
with virtual shotguns (eight maximum) to accommodate an ad hoc
installation.

- Daniel


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Re: [Sursound] Domestic Concert Hall

[Daniel Courville]

Le 2012-07-08 10:02, Dan a écrit :

>Hi, I'm very interested in trying out some HOA IR's, the only verb I have
>used so far is Daniel Courvilles B2Verb. It would be nice to try a
>different
>approach. Are these IR's publicly available?

AFAIK, there's no HOA IRs out there. As Fons said, you can
upsample/upmix/uporder 1st order B-Format IRs with Harpex-B, but, even
then, there's not many B-Format IRs around.

Hopefully, I will make this summer some B-Format IRs of the church where I
sing (and make them available).

As an alternative to my B2Verb, there's Bruce Wiggins reverb
.

- Daniel



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[Sursound] Ambisonia?

[Daniel Courville]

What's the official state of Ambisonia? I added a torrent yesterday and it
seems to be working, but I don't recall an official announcement beside
the one that Dave made in York stating that it would be online soon.

Thanks,

Daniel


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Re: [Sursound] multichannel audio over HDMI

[Daniel Courville]

Le 12-05-25 20:49, Aaron Heller a écrit :

>Same question for MacOS, if I plug the HDMI
>output of my MacMini into a home theater amp, do I see an 8 channel
>audio device in Plogue Bidule (for example)?

Yes, it works. And it's the way we have equipped a few classroom over here
at UQAM's Media School.

- Daniel


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Re: [Sursound] Waveplayer - 16 chnl SD-card audio device

[Daniel Courville]

Le 12-04-20 14:54, Jan Jacob Hofmann a écrit :

>I was pointed to a device, which is able to play audio-files of up to
>16 channels without the need of a computer as a stand-alone device. It
>is basically a SD-card player and I wonder, if this might be
>interesting for some on this list.

Here's something in the same vein that could be of some use:



- Daniel


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Re: [Sursound] ORTF, Blumlein, and HRTF files for download

[Daniel Courville]

Le 12-04-05 14:28, Eric Carmichel a écrit :

>With the Blumlein setting and listening under headphones, voices that
>originated from the back left appear to come from the right. Similarly,
>voices from the back right appear to the left. For sounds originating
>from the front, everything is natural and isn't too different sounding
>from the HRTF setting. But in a "surround" of sound (to include
>naturally-occuring reverberation), sounds from the rear are "off"
>(laterally crossed). (...) L-R errors aren't because the B-format files
>were in the wrong order (W thru Z).

I'm not sure if you're saying that you consider this left/right reversal
an anomaly, but it's the expected behaviour when using a Blumlein setup:
the rear lobe of the microphone pointing left in front is pointing right
in the back. Conversely, the rear lobe of the microphone pointing right in
front is pointing left in the back.

- Daniel


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Re: [Sursound] New Schoeps/Illusonic decoder plug-in

[Daniel Courville]

Le 12-04-04 07:54, Daniel Courville a écrit :

>It could be used to decode B-Format if the B-format is transcoded
>beforehand to Double-MS.

Here's a little B-Format to Double-MS transcoder:
<http://www.radio.uqam.ca/ambisonic/b2dms_transcoder.zip>.

VST and AU, Mac OS only. If you never installed SonicBirth, you need the
SonicBirth framework for the transcoder to work:
<http://www.radio.uqam.ca/ambisonic/sonicbirth_fw_1.3.1b2.zip>.

- Daniel


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[Sursound] New Schoeps/Illusonic decoder plug-in

[Daniel Courville]

There's a new Schoeps/Illusonic decoder plug-in for Double-MS that
incorporates some Illusonic processes.

It could be used to decode B-Format if the B-format is transcoded
beforehand to Double-MS.



The plug-in is free.

- Daniel



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Re: [Sursound] Quality recordings?

[Daniel Courville]

Le 12-04-03 07:00, Bo-Erik Sandholm a écrit :

>By the way do anyone have a VST plugin capabale of B-format to UHJ coding?

You haven't specified the OS, but, if it's Mac OS, there's my B2Stereo/UHJ
plug-in: the UHJ encoding uses Angelo Farina's B to UHJ impulse responses.




- Daniel


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Re: [Sursound] question about simple equation

[Daniel Courville]

Le 12-03-15 20:01, Giuseppe Silvi a écrit:

>I think the W component of ST450 comes out scaled by sqrt2.

It's -3 dB, revsqrt(2), on the W at the output of the ST450. So, yes,
boosting the W by 3 dB, sqrt(2), at the input of your processor makes
sense. Anyway, it's the way I do it.

>// M = (sqrt2 * W) + X;// several clipping problem
>M = .5 * ((sqrt2 * W) + X);// without clipping
>S = Y

Remember that, globally, you're combining three channels into two
channels, so yes, your output can get over 1, which is a problem at the
DAC, but not internally in Max.

- Daniel


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Re: [Sursound] ST450 capsule assembly

[Daniel Courville]

Le 12-02-28 04:44, Richard Lee a écrit:

>Would any of you who have used or have a ST450 Soundfield know if it uses
>the "new" stronger capsule assembly introduced in the ST350

Without having actually used one, I have manipulated a 450 and I am pretty
sure that the inside is similar to the 350.



- Daniel


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Re: [Sursound] ST450 - any user comments?

[Daniel Courville]

Le 12-02-16 08:24, John Leonard a écrit:

>Seriously considering trading up to an ST450. I'd appreciate comments
>from users.

There is an account on the ST450, in French, here:


- Daniel


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Re: [Sursound] Soundfield-type mics: inverting or not?

[Daniel Courville]

Le 11-10-07 17:40, Sampo Syreeni a écrit :

>On 2011-09-30, Daniel Courville wrote:
>
>>I think we should try to establish some sort of "official" database of
>>what SoundField (and TetraMic) models are polarity inverting at the
>>B-Format output.
>
>In that case we first need a datal model. Based on what you're talking
>about in below, it has one relation. The key is "canonical mic name",
>and its dependent attributes are "inverting" and "stereo". Some of the
>values are unknown, which suggests a bit of further normalization.

Hum... I not sure I understand.

What I'm suggesting is a simple database (a CSV file would be fine, even a
Web page) where we have, per mic model, whether it's inverting or not at
the B-Format output and at the stereo output.

For A-Format mic (TetraMic, SPS200), it would be at the output of the
software used to make A to B conversion.

Am I saying the same thing as you (but with different words)? Maybe I
should have said a "list"?

- Daniel


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[Sursound] Soundfield-type mics: inverting or not?

[Daniel Courville]

I think we should try to establish some sort of "official" database of
what SoundField (and TetraMic) models are polarity inverting at the
B-Format output.

While maybe this characteristic is trivial when the mic is used alone, it
becomes important, for example, when combined with spot mics.

Something like this:

Mk IV
B: inverting
Stereo: ?

Mk V
B: inverting
Stereo: ?

ST350
B: inverting
Stereo: non-inverting

and so on...

- Daniel



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Re: [Sursound] SoundField: from Calrec to MBHO, what year?

[Daniel Courville]

Le 11-09-26 04:33, Dave Malham a écrit :

>We've just bought an ST450 (...) The capsules, though, do seem to have
>had a makeover, at least as far as I can see through the grill with the
>aid of my trusty LED keyring torch. The front edges of these are now
>bevelled, unlike those in the earlier versions, portable or otherwise

As Richard already stated, the bevelled caps were already present in the
350.

There is two good hi-res pictures of an opened 350 at the bottom of this
page .

- Daniel


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Re: [Sursound] SoundField: from Calrec to MBHO, what year?

[Daniel Courville]

Le 11-09-25 02:36, Richard Lee a écrit :

>Why do you ask, Daniel?

Well, it's related to this discussion over at Sounddesigners.org
 about the SoundField.

I was really convinced that the SoundField/MBHO partnership had been going
on for a while longer and, rather than to put my foot even farther in my
mouth, I thought I would do some fact checking over here.

- Daniel


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[Sursound] SoundField: from Calrec to MBHO, what year?

[Daniel Courville]

>From the Calrec web site
, we
learn that they stopped mic production in 1989.

Does somebody know in what year SoundField caps production started at MBHO?

Thanks,

Daniel


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[Sursound] Dr Jonathan Halliday, Born 3rd August 1950, Died 2nd June 2011

[Daniel Courville]

 bottom of page


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Re: [Sursound] Ambisonics setup

[Daniel Courville]

Le 11-03-25 12:29, Anthony Palomba a écrit :

>I would like to take a multichannel performance and encode it in
>an ambisonic format, then decode it and send it to multiple speakers.
>
>I want to also be able to easily configure the number of speakers.
>My performance environment is Max/Ableton.
>
>So on the encode side I could use Ambisonic Max externals or
>Malham's VST mixer modules.

Have you specified the OS? If it's Mac OS, you could have a look at my
plug-ins: .

But then again, if you're doing it all in MaxMSP, you should look at the
ICST externals 
.

- Daniel


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Re: [Sursound] B format recording

[Daniel Courville]

Le 11-02-24 09:54, Svein Berge a écrit :

>There is of course Harpex. Excuse me for plugging the plugin, I'm just
>answering questions here... It can convert from B-format to stereo,
>binaural, surround, 3D surround and more.

I can vouch for the quality of the Harpex-B decoder: it is very good. It
should make a splash when it's officially released and the fact that
there's a RTAS version should make it it the "de facto" B-Format decoder.

>As for B-format panners, which is what you
>need to mix spot mics into the B-format signal, I don't think there
>are any with native RTAS or TDM support. However, you can try to wrap
>one of Daniel Courville's excellent VST plugins with FXpansion's VST
>to RTAS adapter.

Kind words Svein, but the FXpansion wrapper works only for mono and stereo
VST plug-ins (anyway, last time I tried). The fact that SonicBirth-made
plug-ins are themselves some sort of wrapped plug-ins is not helping
either.

- Daniel


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Re: [Sursound] Why do you need to decode ambisonic/b format signals ?

[Daniel Courville]

Le 11-01-24 10:23, Andrew Levine a écrit :

>I imagine it would require quite a complex piece of software that could
>differentiate sound sources by grouping their spectral components,
>reconstruct the original positions and then recreate a LCR-soundstage.

Hum... Probably Svein Berge's HARPEX processing would be able to do that.



Check out this .

And the paper that was presented in Paris .

- Daniel


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[Sursound] 3rd International Symposium on Ambisonics & Spherical Acoustics

[Daniel Courville]

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[Sursound] Line Audio QM12i

[Daniel Courville]

People interested in the QM12i microphone can take a look at this page:
.

The files from the recording session are available here, 24/48, wavpacked:
.

The files are from a SoundField ST350 and a QM12i, unprocessed.

Take 1 is in a TV studio, take 2 and 3 are in a chapel. Take 1 and 2 from
both mics are the same length so you can easily compare them in a DAW. Not
sure about take 3.

- Daniel


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Re: [Sursound] Calrec CM4050 Surround Microphone SN: 502

[Daniel Courville]

Le 10-12-13 16:54, Jörn Nettingsmeier a écrit :

>now remains the question: whose are the mysterious initials on that
>controller box?

RL = Richard Lee ?


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Re: [Sursound] Malfunctioning ST350 control unit / Phase

[Daniel Courville]

Le 10-11-28 08:22, Justin Bennett a écrit :

>W is 3dB down of course. I guess it's trivial to flip the phase after
>recording

Thanks. Yes, it is trivial in most DAWs.

- Daniel


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Re: [Sursound] ST350 phase

[Daniel Courville]

Le 10-11-27 04:24, Richard Lee a écrit :

>>As to the polarity issue, L,R are indeed inverted w.r.t. X,Y,Z
>>for front, left, up respectively. It could be the Lemo to XLR
>>breakout cable - did you check the wiring ?
>
>The Mk4 had WXYZ inverted wrt stereo outputs.  I think the stereo outputs
>are 
>"correct". (pressure increase -> Omni increase)

Ha! That explains some weird things I got when mixing with spot
microphones.

Thanks.

- Daniel


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Re: [Sursound] Malfunctioning ST350 control unit

[Daniel Courville]

Le 10-11-26 11:32, Justin Bennett a écrit :

>>If somebody with a ST350 could check the W against the L/R set to omni
>>pattern / 0 width, we would have sort of an answer and something to
>>ask
>>SoundField...
>
>I recorded W and Left (set to omni pattern, 0 width as you suggested)
>simultaneously.
>All other things (endfire, HPF etc) are off.
>the waveforms appear to be identical but one has inverted phase.
>Which one???
>my xlr cables are soldered correctly. going to test the LEMO now.

Thanks for your test. Is the amplitude the same or is the W 3 dB lower?

This is beginning to look like a "feature". I seem to remember reading 20
years ago that the B-Format output of the SF Mk III or Mk IV had it's
polarity intentionally reversed on the B output. If this is right, what
was the rationale behind this? Maybe Peter Craven or Richard Lee could
shed some light on this.

And also, if the polarity was intentionally reversed on the "legacy"
models, the new models would only be carrying on the practice...

- Daniel


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Re: [Sursound] Malfunctioning ST350 control unit

[Daniel Courville]

Le 10-11-23 17:44, f...@kokkinizita.net a écrit :

>As to the polarity issue, L,R are indeed inverted w.r.t. X,Y,Z
>for front, left, up respectively. It could be the Lemo to XLR
>breakout cable - did you check the wiring ?

You mean that the SoundField-supplied B-Format breakout cable would have
all it's + and - inverted?

If somebody with a ST350 could check the W against the L/R set to omni
pattern / 0 width, we would have sort of an answer and something to ask
SoundField...

- Daniel


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Re: [Sursound] Malfunctioning ST350 control unit

[Daniel Courville]

Le 10-11-21 16:20, Daniel Courville a écrit :

>the test revealed the the W output is going bad: at least 20 dB
>down in output compared to what it should be. So I decided the use
>the stereo output for the W by setting it to omni pattern and 0 degree
>width in L/R mode.
>
>Connecting to the Left/Mid output, the signal had the right amplitude, but
>there was some ground-buzz noise it the signal. The Right/Side output is
>free from the noise, so I'll use that one.
>
>Close visual inspection of some impulsive waveforms revealed that the
>"new" W polarity is inverted compared to XYZ.

I made a small test recording yesterday morning for those intrigued by the
ST350 problems:

<http://www.radio.uqam.ca/ambisonic/audio/test_st350_pt.zip> Pro Tools
session, 205 MB

<http://www.radio.uqam.ca/ambisonic/audio/test_st350_split_flac.zip> split
files, 119 MB
<http://www.radio.uqam.ca/ambisonic/audio/test_st350.flac> interleaved,
118 MB

Six channels, B-Format plus L/R.

- Daniel


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[Sursound] Malfunctioning ST350 control unit

[Daniel Courville]

I'm recording a concert tonight with a rented ST350.

Usually, I don't check the ST350 before actual set-up, but this time I
did. Probably because the girlfriend was out of town and I could set-up in
the living room... and wanted to check out recording at 192 kHz.

Anyway, the test revealed the the W output is going bad: at least 20 dB
down in output compared to what it should be. I didn't even listen to it
as a change of cables didn't alleviate the problem. So I decided the use
the stereo output for the W by setting it to omni pattern and 0 degree
width in L/R mode.

Connecting to the Left/Mid output, the signal had the right amplitude, but
there was some ground-buzz noise it the signal. The Right/Side output is
free from the noise, so I'll use that one.

I noticed though that decoding to stereo was weird: left and right were
flipped and the stereo pair was pointing in the back of the ST350. Close
visual inspection of some impulsive waveforms revealed that the "new" W
polarity is inverted compared to XYZ.

The question is then: which output as the right polarity (going positive
on high pressure)? From what I can see in the waveforms, I'd say the
B-Format output, but does somebody here knows for sure?

In the meantime, for monitoring purposes, I made a VST plug-in that
inverts the W and applies the -3 dB.

Regards,

Daniel


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Re: [Sursound] Audition goes Mac. And fully multi-channel!

[Daniel Courville]

Le 10-11-13 22:26, Danny McCarty a écrit :

>When you guys are posting samples what format are you using??

I would use FLAC or WavPack.

- Daniel


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