Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[Paul Hodges]

PS:

What I describe works for WAV, M4A and OGG files equally well.  

I can also link the files on the web, and they play correctly to the
speaker array from my default browser; try it here:

https://cassland.org/sounds/TestQuad/

(If you have told Windows you have a 5.1 setup, for these four-channel
files Windows will use the obvious four speakers, and send the centre
speaker the sum of Lf and Rf.)

Paul

-- 
Paul Hodges

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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[Paul Hodges]

--On 24 December 2017 16:37 -0500 Len Moskowitz
 wrote:

> The consensus seems to be that the current release of VLC 2.2.8 can't
> do it easily, if at all.

VLC plays my quad files to my square array without any special setting
up at all, and this should generalise to any number of speakers that
can be specified to Windows.

I believe that what you need (this is entirely Windows oriented) is:

(1) A sound driver that accepts multichannel input through the Windows
interface, which you then configure in the control panel sound applet
as a 5.1 device (you can test the speakers there, too).  At present I
have it configured as a quad device; I could test setting 5.1 for use
with six speakers next week.  

(2) This can be the Windows default device (which as you'd expect VLC
uses by default), or if not, you can tell VLC to use the specific
device required - I've done it both ways.

(3) The multichannel file needs to have a speaker mask that will link
the channels to the "5.1" speakers in an appropriate way - you will
need to contrive the speaker connection to match, of course.  I use
WaveLab to make the file, which can have its multichannel setup
arranged for various possible masks.  Or Richard Dobson's MultiChannel
Toolkit contains programs to set a mask and to reorder channels if that
helps.

(4) VLC will then play the channels to the Windows inputs according to
the mask settings.

It happens that my device (MOTU UltraLite) does not have a proper
multichannel Windows driver, but I have been able to use a third-party
virtual audio cable to get around that.

Paul

-- 
Paul Hodges

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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[jim moses]

On a mac, quicktime will play 5.1 and 7.1. could work by configuring
speakers with audio-midi utility.

jim

On Sun, Dec 24, 2017 at 4:37 PM, Len Moskowitz 
wrote:

> Alex Drioli wrote:
>
> Wouldn t you be able to use VLC?
>>
>
>
> The consensus seems to be that the current release of VLC 2.2.8 can't do
> it easily, if at all.
> If you disagree, would you please provide us with clear instructions how
> to do it? We'd love to know!
>
>
>
> Len Moskowitz (mosko...@core-sound.com)
> Core Sound LLC
> www.core-sound.com
> Home of TetraMic and OctoMic
>
>
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-- 
Jim Moses
Technical Director/Lecturer
Brown University Music Department and M.E.M.E. (Multimedia and Electronic
Music Experiments)
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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[Jack Reynolds]

Ah. Perhaps it’s not out yet. 
The betas are available here:
https://nightlies.videolan.org/

They have also announced a collaboration with 3D sound labs, which could be 
very interesting.
No specific dates at the moment tho

Sent from my iPhone

> On 25 Dec 2017, at 12:39, Len Moskowitz  wrote:
> 
> Jack Reynolds wrote:
> 
>> VLC 3.0 has been available as one of their nightly betas for a while, but I 
>> think it has just been release proper
> 
> The VLC Home Page still shows v2.2.8.
> 
> 
> Len Moskowitz (mosko...@core-sound.com)
> Core Sound LLC
> www.core-sound.com
> Home of TetraMic and OctoMic
> 
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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[Len Moskowitz]

Jack Reynolds wrote:

VLC 3.0 has been available as one of their nightly betas for a while, 
but I think it has just been release proper


The VLC Home Page still shows v2.2.8.


Len Moskowitz (mosko...@core-sound.com)
Core Sound LLC
www.core-sound.com
Home of TetraMic and OctoMic

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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[Jack Reynolds]

VLC 3.0 has been available as one of their nightly betas for a while, but I 
think it has just been release proper

Sent from my iPhone

> On 24 Dec 2017, at 21:37, Len Moskowitz  wrote:
> 
> Alex Drioli wrote:
> 
>> Wouldn t you be able to use VLC?
> 
> 
> The consensus seems to be that the current release of VLC 2.2.8 can't do it 
> easily, if at all.
> If you disagree, would you please provide us with clear instructions how to 
> do it? We'd love to know!
> 
> 
> 
> Len Moskowitz (mosko...@core-sound.com)
> Core Sound LLC
> www.core-sound.com
> Home of TetraMic and OctoMic
> 
> 
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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[Len Moskowitz]

Alex Drioli wrote:


Wouldn t you be able to use VLC?



The consensus seems to be that the current release of VLC 2.2.8 can't do 
it easily, if at all.
If you disagree, would you please provide us with clear instructions how 
to do it? We'd love to know!




Len Moskowitz (mosko...@core-sound.com)
Core Sound LLC
www.core-sound.com
Home of TetraMic and OctoMic


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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[Axel Drioli]

Wouldn t you be able to use VLC?
On Sun, 24 Dec 2017 at 03:55, Len Moskowitz 
wrote:

> Back in October, I wrote:
>
>
> > I'd appreciate it if someone could recommend a very simple Windows
> > audio player that can play a 6-channel WAV file to a 6-speaker ring.
>
>
> Richard Dobson responded:
>
>
> > Perhaps the "simplest" possible player is a command line one? My
> > "paplay" program plays (and loops)
>
> > multichannel files to a nominated device, and while it does not have
> > interactive facilities it offers full
>
> > channel mapping and selecting. Plus elementary B-Format decoding.
> >
> > Part of the old mctoolkit, now resident here:
> >
> > http://www.rwdobson.com/mctools.html
>
> Thank you, Richard. "paplay" works fine and is as simple to use as could
> be.
>
>
>
>
> Len Moskowitz (mosko...@core-sound.com)
> Core Sound LLC
> www.core-sound.com
> Home of TetraMic and OctoMic
>
> ___
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> edit account or options, view archives and so on.
>
-- 
*Axel Drioli *

*Immersive Audio Producer for 360 Video, VR and Installations*
- Recordist | Designer | Editor | Mixer -


*Tel-Facetime: +44 7460 223640 *
*Skype: axel.drioli*
*Website: *
*axeldrioli.com *
*E-mail: 3dso...@axeldrioli.com <3dso...@axeldrioli.com>*


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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[Len Moskowitz]

Back in October, I wrote:



I'd appreciate it if someone could recommend a very simple Windows
audio player that can play a 6-channel WAV file to a 6-speaker ring.



Richard Dobson responded:


Perhaps the "simplest" possible player is a command line one? My 
"paplay" program plays (and loops)


multichannel files to a nominated device, and while it does not have 
interactive facilities it offers full



channel mapping and selecting. Plus elementary B-Format decoding.

Part of the old mctoolkit, now resident here:

http://www.rwdobson.com/mctools.html


Thank you, Richard. "paplay" works fine and is as simple to use as could 
be.





Len Moskowitz (mosko...@core-sound.com)
Core Sound LLC
www.core-sound.com
Home of TetraMic and OctoMic

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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[Bo-Erik Sandholm]

Wavosaur seems really neat as it has VST support, maybe to use on windows
to listen to a b-format file and use a vst for decoding to binaural

On 26 Oct 2017 03:43, "Augustine Leudar"  wrote:

> quicktime player does I hink
>
> On 25 October 2017 at 19:14, Eero Aro  wrote:
>
> > Hi All
> >
> > Wavosaur plays multichannel files and all channels can be routed through
> > a multichannel interface.
> >
> > http://tinyurl.com/ydemrofs
> >
> > But I understood that Len didn't want to use too complicated software?
> >
> > Do you need/want to use a computer at all?
> > How about a standalone SD card or HD player?
> >
> > Eero
> >
> > ___
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> > Sursound@music.vt.edu
> > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here,
> > edit account or options, view archives and so on.
> >
>
>
>
> --
> Dr. Augustine Leudar
> Artistic Director Magik Door LTD
> Company Number : NI635217
> Registered 63 Ballycoan rd,
> Belfast BT88LL
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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[Augustine Leudar]

quicktime player does I hink

On 25 October 2017 at 19:14, Eero Aro  wrote:

> Hi All
>
> Wavosaur plays multichannel files and all channels can be routed through
> a multichannel interface.
>
> http://tinyurl.com/ydemrofs
>
> But I understood that Len didn't want to use too complicated software?
>
> Do you need/want to use a computer at all?
> How about a standalone SD card or HD player?
>
> Eero
>
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> edit account or options, view archives and so on.
>



-- 
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Artistic Director Magik Door LTD
Company Number : NI635217
Registered 63 Ballycoan rd,
Belfast BT88LL
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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[Eero Aro]

Hi All

Wavosaur plays multichannel files and all channels can be routed through
a multichannel interface.

http://tinyurl.com/ydemrofs

But I understood that Len didn't want to use too complicated software?

Do you need/want to use a computer at all?
How about a standalone SD card or HD player?

Eero
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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[Martin Leese]

Marc Lavallée wrote:

> Just a question: despite possible degradation of the decoded
> ambisonics stream (due to phase errors), could it be that our perception
> mechanisms (from the ears to the brain) can "fix" some distortions?
> Also, what are the frequency ranges affected by phase errors (for
> example in a AAC or Opus multi-channel stream) that could induce
> perceptual problems? What's the limit: 16, 12, 8 or 4Khz?

Unless I have misunderstood something (which
happens), phase is used to localise sounds
with frequencies between 150 Hz and 1.5 kHz,
so the limit is 1.5 kHz or thereabouts.

Regards,
Martin
-- 
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E-mail: martin.leese  stanfordalumni.org
Web: http://members.tripod.com/martin_leese/
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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[mick ritchie]

Just apologised to len for a brain short circuit - Audacity will record but not 
play back more than stereo - dr

So of this ilk Reaper is my usual simple player though id ahve htought  there 
must be simple multichannelplayers around these days

mick


On 25 Oct 2017, at 13:57, mick ritchie wrote:

> Hi len
> 
> depends on how you want to use it -  Audacity will play back 4/6/8  channel 
> files though wont allow routing so they
> just output  to 1-n - great for quick testing but not for sharing.
> I did do a bunch of streaming tests 5 years ago and settled on 4ch wavs in a 
> quicktime movie - no loss but for streaming
> or sharing I had to create a QT ref movie with the channels allocated as the 
> movie itself wouldnt remember and reverted  back
> to same mono output for each channel.   They worked in VLC and even itunes 
> shock horror as long as i had a multichannel interface as default
> 
> I'll try an mp4 when i get some time - if I just create a 4channel file with 
> duplicated mono audio and just test null phasing
> after Ive encoded
> 
> 
> 
> mick
> 
> On 25 Oct 2017, at 02:53, len moskowitz wrote:
> 
>> I'd appreciate it if someone could recommend a very simple Windows audio 
>> player that can play a 6-channel WAV file to a 6-speaker ring.
>> 
>> 
>> 
>> A DAW will be too complicated for this user and application.
>> 
>> 
>> 
>> Len Moskowitz (mosko...@core-sound.com)
>> Core Sound LLC
>> www.core-sound.com
>> Home of TetraMic and OctoMic
>> ___
>> Sursound mailing list
>> Sursound@music.vt.edu
>> https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
>> account or options, view archives and so on.
> 
> ___
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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[umashankar manthravadi]

Being a low budget man, this has been of considerable interest to me. Does 
ambisonic systems have to be of the same quality as a stereo system? I doubt 
very much. For one thing, a stereo system has to excite the room in which it 
sits. That means power and extended frequency response. The cheapest system I 
tried was two “5.1” speaker  sets, each costing about 10USD. I did not persist 
with it, but was very satisfactory for the money. Two subwoofers too. (even if 
they woofed at about 100 Hz). I have KEF 5 speakers and 50 watt per channel 
eight watt amplifier, and it is rarely stressed.



I think there will be similar tradeoffs in compression, phase errors etc which 
we have really explored



umashankar



Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10




From: Sursound <sursound-boun...@music.vt.edu> on behalf of Marc Lavallée 
<m...@hacklava.net>
Sent: Wednesday, October 25, 2017 6:15:28 PM
To: Surround Sound discussion group
Subject: Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?


Just a question: despite possible degradation of the decoded
ambisonics stream (due to phase errors), could it be that our perception
mechanisms (from the ears to the brain) can "fix" some distortions?
Also, what are the frequency ranges affected by phase errors (for
example in a AAC or Opus multi-channel stream) that could induce
perceptual problems? What's the limit: 16, 12, 8 or 4Khz?

To what extent do we have to care about Hi-Fi and High Resolution
when dealing with Ambisonics? This is an important issue for the
acceptance of Ambisonics... Do we need a fusion reactor to enjoy
Ambisonics? ;-)

--
Marc

Le Wed, 25 Oct 2017 14:08:49 +0200
David Pickett <d...@fugato.com> a écrit:

> But I have been thinking about it -- fatal!
>
> If you start off from WXY, which is what I use, and make these into
> 4.0, you have merely done a linear transform (a sophisticated LR-->SD
> relationship). As this is totally lossless, any added phase anomalies
> either before or after the transform, while they may not give the
> same effect, could be significant. All I can say is that I have not
> heard any significant degradation of my recordings when coding them
> into high rate MP4 and playing them over the internet before
> subsequent decoding.
>
> I am not trying to be awkward, just trying to make sense of this!
>
> David
>
> At 13:12 25-10-17, Dave Malham wrote:
>  >I should have said "storing pre-decoded signals in a compressed
>  >format has less potential to be problematic" since phase errors
>  >likely to upset pre-decoded material would probably also cause
>  >problems with stereo which hopefully would have been picked up and
>  >dealt with during testing. I should say here that that's just what
>  >I feel likely to be the case, I can't say that I've actually tested
>  >it.
>  >
>  >  Dave
>  >
>  >On 25 October 2017 at 11:30, David Pickett <d...@fugato.com> wrote:
>  >
>  >> At 09:55 25-10-17, Dave Malham wrote:
>  >>
>  >> >   Just a word of warning, take care using compressed formats
>  >> > like mp4 for
>  >> >storing B format. If the compression used is lossy, this can
>  >> >screw up the decoding since phase errors can result in the sum
>  >> >and difference equations involved producing wrong results. Of
>  >> >course, storing pre-decoded signals
>  >> in
>  >> >a compressed format doesn't suffer from this.
>  >>
>  >> Dave,
>  >>
>  >> I always add add shelf filtering and then decode from B format to
>  >> 4.0 before encoding to MP4. I dont see why there should not also
>  >> be phase problems with encoding 4.0 signals in MP4 (why do you
>  >> say not?); but I have never noticed any.
>  >>
>  >> David
>  >>
>  >> ___
>  >> Sursound mailing list
>  >> Sursound@music.vt.edu
>  >> https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe
>  >> here, edit account or options, view archives and so on.
>  >>
>  >
>  >
>  >
>  >--
>  >
>  >As of 1st October 2012, I have retired from the University.
>  >
>  >These are my own views and may or may not be shared by the
>  >University
>  >
>  >Dave Malham
>  >Honorary Fellow, Department of Music
>  >The University of York
>  >York YO10 5DD
>  >UK
>  >
>  >'Ambisonics - Component Imaging for Audio'
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> &g

Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[mick ritchie]

Hi len

depends on how you want to use it -  Audacity will play back 4/6/8  channel 
files though wont allow routing so they
just output  to 1-n - great for quick testing but not for sharing.
I did do a bunch of streaming tests 5 years ago and settled on 4ch wavs in a 
quicktime movie - no loss but for streaming
or sharing I had to create a QT ref movie with the channels allocated as the 
movie itself wouldnt remember and reverted  back
to same mono output for each channel.   They worked in VLC and even itunes 
shock horror as long as i had a multichannel interface as default

I'll try an mp4 when i get some time - if I just create a 4channel file with 
duplicated mono audio and just test null phasing
after Ive encoded



mick

On 25 Oct 2017, at 02:53, len moskowitz wrote:

> I'd appreciate it if someone could recommend a very simple Windows audio 
> player that can play a 6-channel WAV file to a 6-speaker ring.
> 
> 
> 
> A DAW will be too complicated for this user and application.
> 
> 
> 
> Len Moskowitz (mosko...@core-sound.com)
> Core Sound LLC
> www.core-sound.com
> Home of TetraMic and OctoMic
> ___
> Sursound mailing list
> Sursound@music.vt.edu
> https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
> account or options, view archives and so on.

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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[Marc Lavallée]

Just a question: despite possible degradation of the decoded
ambisonics stream (due to phase errors), could it be that our perception
mechanisms (from the ears to the brain) can "fix" some distortions?
Also, what are the frequency ranges affected by phase errors (for
example in a AAC or Opus multi-channel stream) that could induce
perceptual problems? What's the limit: 16, 12, 8 or 4Khz?

To what extent do we have to care about Hi-Fi and High Resolution
when dealing with Ambisonics? This is an important issue for the
acceptance of Ambisonics... Do we need a fusion reactor to enjoy
Ambisonics? ;-)

--
Marc

Le Wed, 25 Oct 2017 14:08:49 +0200
David Pickett  a écrit:

> But I have been thinking about it -- fatal!
> 
> If you start off from WXY, which is what I use, and make these into 
> 4.0, you have merely done a linear transform (a sophisticated LR-->SD 
> relationship). As this is totally lossless, any added phase anomalies 
> either before or after the transform, while they may not give the 
> same effect, could be significant. All I can say is that I have not 
> heard any significant degradation of my recordings when coding them 
> into high rate MP4 and playing them over the internet before 
> subsequent decoding.
> 
> I am not trying to be awkward, just trying to make sense of this!
> 
> David
> 
> At 13:12 25-10-17, Dave Malham wrote:
>  >I should have said "storing pre-decoded signals in a compressed
>  >format has less potential to be problematic" since phase errors
>  >likely to upset pre-decoded material would probably also cause
>  >problems with stereo which hopefully would have been picked up and
>  >dealt with during testing. I should say here that that's just what
>  >I feel likely to be the case, I can't say that I've actually tested
>  >it.
>  >
>  >  Dave
>  >
>  >On 25 October 2017 at 11:30, David Pickett  wrote:
>  >  
>  >> At 09:55 25-10-17, Dave Malham wrote:
>  >>  
>  >> >   Just a word of warning, take care using compressed formats
>  >> > like mp4 for
>  >> >storing B format. If the compression used is lossy, this can
>  >> >screw up the decoding since phase errors can result in the sum
>  >> >and difference equations involved producing wrong results. Of
>  >> >course, storing pre-decoded signals  
>  >> in  
>  >> >a compressed format doesn't suffer from this.  
>  >>
>  >> Dave,
>  >>
>  >> I always add add shelf filtering and then decode from B format to
>  >> 4.0 before encoding to MP4. I dont see why there should not also
>  >> be phase problems with encoding 4.0 signals in MP4 (why do you
>  >> say not?); but I have never noticed any.
>  >>
>  >> David
>  >>
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>  >
>  >
>  >
>  >--
>  >
>  >As of 1st October 2012, I have retired from the University.
>  >
>  >These are my own views and may or may not be shared by the
>  >University
>  >
>  >Dave Malham
>  >Honorary Fellow, Department of Music
>  >The University of York
>  >York YO10 5DD
>  >UK
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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[David Pickett]

But I have been thinking about it -- fatal!

If you start off from WXY, which is what I use, and make these into 
4.0, you have merely done a linear transform (a sophisticated LR-->SD 
relationship). As this is totally lossless, any added phase anomalies 
either before or after the transform, while they may not give the 
same effect, could be significant. All I can say is that I have not 
heard any significant degradation of my recordings when coding them 
into high rate MP4 and playing them over the internet before 
subsequent decoding.


I am not trying to be awkward, just trying to make sense of this!

David

At 13:12 25-10-17, Dave Malham wrote:
>I should have said "storing pre-decoded signals in a compressed format has
>less potential to be problematic" since phase errors likely to upset
>pre-decoded material would probably also cause problems with stereo which
>hopefully would have been picked up and dealt with during testing. I should
>say here that that's just what I feel likely to be the case, I can't say
>that I've actually tested it.
>
>  Dave
>
>On 25 October 2017 at 11:30, David Pickett  wrote:
>
>> At 09:55 25-10-17, Dave Malham wrote:
>>
>> >   Just a word of warning, take care using compressed formats like mp4 for
>> >storing B format. If the compression used is lossy, this can screw up the
>> >decoding since phase errors can result in the sum and difference equations
>> >involved producing wrong results. Of course, storing pre-decoded signals
>> in
>> >a compressed format doesn't suffer from this.
>>
>> Dave,
>>
>> I always add add shelf filtering and then decode from B format to 4.0
>> before encoding to MP4. I dont see why there should not also be phase
>> problems with encoding 4.0 signals in MP4 (why do you say not?); but I have
>> never noticed any.
>>
>> David
>>
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>>
>
>
>
>--
>
>As of 1st October 2012, I have retired from the University.
>
>These are my own views and may or may not be shared by the University
>
>Dave Malham
>Honorary Fellow, Department of Music
>The University of York
>York YO10 5DD
>UK
>
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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[John Leonard]

The Audio Player in Plogue Bidule will do this. You can get fancy with remote 
starts, if you like.

John

Please note new email address & direct line phone number
email: j...@johnleonard.uk
phone +44 (0)20 3286 5942


> On 25 Oct 2017, at 02:53, len moskowitz  wrote:
> 
> I'd appreciate it if someone could recommend a very simple Windows audio 
> player that can play a 6-channel WAV file to a 6-speaker ring.
> 
> 
> 
> A DAW will be too complicated for this user and application.
> 
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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[Dave Malham]

I should have said "storing pre-decoded signals in a compressed format has
less potential to be problematic" since phase errors likely to upset
pre-decoded material would probably also cause problems with stereo which
hopefully would have been picked up and dealt with during testing. I should
say here that that's just what I feel likely to be the case, I can't say
that I've actually tested it.

  Dave

On 25 October 2017 at 11:30, David Pickett  wrote:

> At 09:55 25-10-17, Dave Malham wrote:
>
> >   Just a word of warning, take care using compressed formats like mp4 for
> >storing B format. If the compression used is lossy, this can screw up the
> >decoding since phase errors can result in the sum and difference equations
> >involved producing wrong results. Of course, storing pre-decoded signals
> in
> >a compressed format doesn't suffer from this.
>
> Dave,
>
> I always add add shelf filtering and then decode from B format to 4.0
> before encoding to MP4. I dont see why there should not also be phase
> problems with encoding 4.0 signals in MP4 (why do you say not?); but I have
> never noticed any.
>
> David
>
> ___
> Sursound mailing list
> Sursound@music.vt.edu
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> edit account or options, view archives and so on.
>



-- 

As of 1st October 2012, I have retired from the University.

These are my own views and may or may not be shared by the University

Dave Malham
Honorary Fellow, Department of Music
The University of York
York YO10 5DD
UK

'Ambisonics - Component Imaging for Audio'
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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[David Pickett]

At 09:55 25-10-17, Dave Malham wrote:

>   Just a word of warning, take care using compressed formats like mp4 for
>storing B format. If the compression used is lossy, this can screw up the
>decoding since phase errors can result in the sum and difference equations
>involved producing wrong results. Of course, storing pre-decoded signals in
>a compressed format doesn't suffer from this.

Dave,

I always add add shelf filtering and then decode from B format to 4.0 
before encoding to MP4. I dont see why there should not also be phase 
problems with encoding 4.0 signals in MP4 (why do you say not?); but 
I have never noticed any.


David

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Re: [Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[Dave Malham]

Hi,
   Just a word of warning, take care using compressed formats like mp4 for
storing B format. If the compression used is lossy, this can screw up the
decoding since phase errors can result in the sum and difference equations
involved producing wrong results. Of course, storing pre-decoded signals in
a compressed format doesn't suffer from this.

Dave

PS Len - congrats on the OctoMic.

On 25 October 2017 at 06:59, David Pickett  wrote:

> Len,
>
> I seem to recall that VLC will do this if set up correctly with a
> multichannel sound card (I have RME UFX), but maybe that is not simple
> enough for you. Alternatively, a simple HTML5 page such as this can be used
> locally: http://www.fugato.com/pickett/surround-tests.shtml
>
> Although I use only 4 channels these are 6-channel mp4 files: the format
> was chosen simply because mp4 takes up less space than WAV files. Possibly
> other browsers have been updated in the past two years.
>
> Marc may have better recommendations. :)
>
> David
>
> At 03:53 25-10-17, len moskowitz wrote:
>
>> I'd appreciate it if someone could recommend a very simple Windows audio
>> player that can play a 6-channel WAV file to a 6-speaker ring.
>>
>> A DAW will be too complicated for this user and application.
>>
>> Len Moskowitz (mosko...@core-sound.com)
>> Core Sound LLC
>> www.core-sound.com
>> Home of TetraMic and OctoMic
>> ___
>>
>
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-- 

As of 1st October 2012, I have retired from the University.

These are my own views and may or may not be shared by the University

Dave Malham
Honorary Fellow, Department of Music
The University of York
York YO10 5DD
UK

'Ambisonics - Component Imaging for Audio'
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[Sursound] Simple Software to Play a 6-channel WAV File (Windows)?

[len moskowitz]

I'd appreciate it if someone could recommend a very simple Windows audio 
player that can play a 6-channel WAV file to a 6-speaker ring.




A DAW will be too complicated for this user and application.



Len Moskowitz (mosko...@core-sound.com)
Core Sound LLC
www.core-sound.com
Home of TetraMic and OctoMic
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