Greetings to all:
I am an Audio Production Technology student in the USA. I am also a hearing
scientist with a few modest credentials under my belt. I am, however, new to
Ambisonics.
I have been an audio enthusiast for most of my life. My current research
interests include cochlear implants and
Hello Sampo,
Many thanks for your thorough and interesting reply to my post. Even if
binaural listening with head tracking could be perfected, headphones are still
out of the question when it comes to presenting stimuli to hearing aid and
cochlear implant users. A need for presenting sound in
Greetings to All,
The patent 'finds' are interesting and, as usual, give credence to the
expression there's nothing new... Of course, if one looks closely at the
cited patents, you'll see that the microphones and associated circuitry mix
down to single-channel outputs (or provide a meter
Greetings:
Hello Michael C. and Fons A.,
Thank you for your detailed and informative responses to my questions.
Fortunately, the speakers I have chosen are well-matched and have good response
characteristics. I matched them some time ago; however, each speaker underwent
testing at an identical
Happy New Year to All,
I have to agree with Dave M. that the Acta Acustica united with Acustica
articles can be fiendishly expensive (Dave's words). As a student, I'm keeping
my fingers crossed that I can get these through inter-library loan. In some
instances, articles of interest can be found
Hello Jörn,
Thanks for writing. Your response isn’t too late, and it may have saved me from
potential grief. From what I’ve read, FFADO 2.0 will work with the MOTU
Traveler (first generation) and the 896HD. These are the very two MOTU devices
that I own.
Some years back (prior to learning of
Hello Fons,
Your query (what motivates authors to make their work available in this way)
made me think of my own situation. Perhaps publishing in peer-reviewed journals
is analogous to receiving Merit Badges in Scouts: In some instances, it’s how
one gets rated, noticed, or makes it to the next
Hello Michael,
I agree with you 100
percent about forgetting realtime and creating the wav files that can be played
on my existing setup. Even in the past, when I've used MATLAB to alter signals
(for example, a MATLAB-implemented phase vocoder for
implant simulations), I do the processing
Hi Dave,
I just wished to add my two bits regarding binaural listening and the rearward
illusion you experience. Having investigated the effects of binaural electronic
hearing protectors on localization, I do recall two sources of information (in
addition to my own) where listeners experienced
Hi Fons,
Thanks for the info regarding Ardour. Although I’m not an application developer
(nor aspire to be), I have used Python. Not too long back, I purchased some
sensors from Phidget to make a response box. I also built a few gadgets based
on the Arduino microcontroller, and Python code
Greetings Everyone,
First, Many thanks to all for the help regarding my recent post (VVMic
TetraMic help). Special thanks to David McGriffy (VVMic), Len Moskowitz (Core
Sound / TetraMic), Richard L., Aaron H., Eric B., Jascha N., Paul H., Bill de
G. and anyone I may have accidentally missed.
I
Hi Cara,
I enjoyed reading your post and the many responses that followed. I assume
you’re aware of the book “Michael Gerzon: Beyond Psychoacoustics.” I believe
you’d find it to be worthwhile reading for your dissertation.
As an American, I’ll confess we like things big, loud, and gimmicky.
Greetings All,
I'm glad the topic of Blumlein, ORTF, etc. came up. I've been doing a lot of
music recording (in contrast to my usual cochlear implant research). Included
in my arsenal is an SSL console, Neumann U149 mics, an AEA R44 ribbon mic (plus
several Royer ribbon ics), superb musicians,
Hello Haig,
Thank you very much for the note and for the link (below). Gathering
from my research and from what I’ve read over the years, pitch discrimination
is difficult for cochlear implant (CI) recipients, thus making music
enjoyment... well... not so
enjoyable. As the video states, we take
Hi Aaron,
Many thanks for sending the link to JASA Express Letters. Readers of this
mailing list may question why an article pertaining to cochlear implant (CI)
patients is relevant to Ambisonics. I’ll get to this a few paragraphs down.
It is no surprise that interaural timing differences
Greetings All,
I was intrigued by the post titled 'catching flies' because distance-to
information is an area of interest to me. As a few folks out there know, my
interest in Ambisonics (aside from music) is its application to hearing
research. It is important for safety reasons that a hearing
Greetings All,
Many thanks for the insightful responses to my recent post (Catching the same
fly twice). I was pleased to read that most folks on the mailing list are a lot
more qualified to discuss Ecological Psychology than I was (and thanks to E.
Deleflie for the kind and insightful note).
else experiences except in some structural sense.
Robert
On Sat, 2 Jun 2012, Eric Carmichel wrote:
Greetings All,
I continue to learn a lot from this site (and someday hope to have something
to give back). For now, however, I will briefly comment on posts by
Umashankar Mantravadi, Augustine
Hello Marc, Paul, Aaron and everyone,
Thanks for the informative responses to my bittorrent inquiry.
Paul, I had previously downloaded a number of files from your ambisonic.info
site, as there is reference to it from the Core-Sound site (I'm fairly certain
this is how I found it months back). I
Hello All,
First, many thanks for taking time to read this. This may be one of my better
attempts at communicating what I’m attempting to do.
I very much appreciate and respect all the input regarding human perception (re
prior posts / the sound of vision).
Professor Robert Greene wrote *...But
Greetings to All,
I have been reviewing the literature on Auralization in attempts to create
viable stimuli for research. Everybody here has been great. I do have another
question/comment regarding loudspeaker placement.
In nearly all Ambisonic setups, the listener's head lies on a line
to everyone who has provided recorded material as well as food for thought.
Kind regards,
Eric
From: Michael Chapman s...@mchapman.com
To: Eric Carmichel e...@elcaudio.com; Surround Sound discussion group
sursound@music.vt.edu
Sent: Wednesday, October 3, 2012
Ok, the subject title is a take on the Robbie Robertson/The Band/Dylan song The
Weight (Take a load off Annie... and you can put the load right on me). So what
does this have to do with sursound? Answer: Native processing (Intel) versus
dedicated hardware control (via a collection of BB PGA2311
From: Augustine Leudar augustineleu...@gmail.com
To: Eric Carmichel e...@elcaudio.com; Surround Sound discussion group
sursound@music.vt.edu
Sent: Saturday, October 6, 2012 2:43 AM
Subject: Re: [Sursound] Take a Load off Intel (and put the Load on IC)
I am not sure about the second part
Greetings:
I've noticed an STS 250 mic that has been on eBay (at least the US site) for
more than a week. In fact, I had written the seller (who I do NOT know ) with
some info pertaining to the STS, and the seller has since added that info to
the listing. Specifically, the paragraph that reads,
Hello Sampo,
I always appreciate your suggestions, insight, and (occasional) provocative
comments. Here’s a tiny bit on info that may shed light on why I do things in
‘squirrelly’ fashion (and my Ambisonic recording of a chattering squirrel ain’t
nothin’ compared to this diatribe).
My doc
Pro recorder, and a MOTU 896HD audio interface
(mostly used for playback).
Anyway, I'd certainly like to learn more about your products.
Thanks again for the info.
Kind regards,
Eric
From: Conor Mulvey cono...@visisonics.com
To: Eric Carmichel e...@elcaudio.com
to
comprehend. But as long as I turn toward the shadows (or my feet), everything
remains real.
Best regards,
E
From: Michael Chapman s...@mchapman.com
To: Eric Carmichel e...@elcaudio.com; Surround Sound discussion group
sursound@music.vt.edu
Sent: Saturday
Greetings,
I would like to model microphone pickup patterns in conjunction with HRTFs and
Ambisonic recordings that I've made. To give a specific example, I would like
model a miniature supercardiod mic, pointed forward, that is located proximal
(or superior) to the pinna. This would be akin to
Hi All,
Being as the vestibulocochlear nerve is responsible for transmitting
sound and equilibrium (balance) information from the inner ear to the
brain, it seems that balance dysfunction (or abnormal situations, such
as space travel) could affect localization.
Dr. Michael Cevette, Ph.D. (Mayo
For Sursound subscribers, the ideas of virtual microphones and binaural
recordings via Ambisonic recordings is old news. But there are a lot of hearing
scientists, sound designers, recording engineers, and surround-sound
enthusiasts who are not familiar with Ambisonics and what it offers.
One
Hello Eric,
Many thanks for the link to Knowles' miniature mics, as that is more current
than the HA mic articles (e.g. Killion et al) I have on file. Clearly, such
mics aren't intended to compete with Neumann, Schoeps, etc. studio mics, but
their performance is quite amazing for such tiny mic
Greetings All
Back in October (Sursound Digest, Vol 51, Issue 24, to be exact) there was a
post regarding places to visit, and Orfield Labs, the quietest place on Earth
was showcased. It was then pointed out that the BBC article (link below) said,
an average conversation runs at about 30
Greetings to All,
I've been working on listening samples to help explain my ideas regarding
hearing aid and cochlear implant research to others. For starters, I'm using
IRs obtained with a Soundfield mic to auralize dry speech. Unfortunately, more
questions than sounds surround me weary head.
.
Again, many thanks for writing.
Kind regards and Happy Holidays,
Eric
From: John Abram johnbab...@gmail.com
To: Eric Carmichel e...@elcaudio.com; Surround Sound discussion group
sursound@music.vt.edu
Sent: Saturday, December 15, 2012 6:50 AM
Subject: Re
...@gmail.com
To: Eric Carmichel e...@elcaudio.com; Surround Sound discussion group
sursound@music.vt.edu
Sent: Saturday, December 15, 2012 6:50 AM
Subject: Re: [Sursound] Ghost in Machine
Perhaps I'm misunderstanding, but this sounds completely normal to me.
The artifacts are simply side effects
for
myself, but I think I have a good grasp of what's going on. Listen and learn.
Happy Holidays,
Eric
From: John Abram johnbab...@gmail.com
To: Eric Carmichel e...@elcaudio.com; Surround Sound discussion group
sursound@music.vt.edu
Sent: Saturday, December 15, 2012 6
(this ain't gonna fly).
Many thanks for your time.
Best wishes,
Eric
From: Fons Adriaensen f...@linuxaudio.org
To: Eric Carmichel e...@elcaudio.com
Sent: Sunday, December 16, 2012 4:13 AM
Subject: Re: [Sursound] Plate Reverb rocks
(going off-list)
On Sat, Dec 15
recording. I have Altiverb, but
really haven't used it much. Now I'm interested in exploring it further.
Kind regards,
Eric C.
From: Pierre Alexandre Tremblay tremb...@gmail.com
To: Eric Carmichel e...@elcaudio.com; Surround Sound discussion group
sursound
Hello Toni,
You're correct about Waves--no x, y, z files--just surround on their
Acoustics.net website and IR bundles (I have the Waves Mercury bundle).
www.openairorg.net is the only remaining Ambisonic IR library that I can find.
There has been updated info to the site since I first discovered
Greetings to All,
I was looking at the web link that David M. provided regarding inertial
transducers, and wondered whether placing one of these devices on my living
room wall would approximate the elusive infinite-baffle loudspeaker (I’m
recalling articles written by the great Harry Olson).
Greetings All,
The idea of recording an IR in an unusual environment* is interesting. When I
first read the original post, I wondered how closely a simulation would match a
recorded response.
Although I'm far from an expert on room acoustics, I have used simulation
software (e.g. Sabine, Odeon,
Greetings to All,
Just a few thoughts regarding recent posts and the argon-filled sphere.
Martin, I definitely boo-booed by suggesting the recording would be made in an
all-argon atmosphere. But comparing the *sound* one might experience between
the two conditions (air vs argon) might have been
Greetings to Everyone,
I received some great input and ideas related to my last two post (bi-amping
the B-format and subwoofers). Everyone’s input was greatly appreciated.
It wasn’t all too long ago that I first learned of Ambisonics, and then this
group. At the very start, there was a comment
Greetings to All,
As always, many thanks for everyone’s time. This post references replies
received from Peter and Jörn: Thank you both for your expertise, sharing
experiences, and taking time to write.
[from Dr. Lennox] “For mobile listeners, and indeed, off-centre listeners, the
amplitude
, but please also consider viewing the above two links--I
need to re-read them myself.
Best,
Eric
From: Robert Greene gre...@math.ucla.edu
To: Eric Carmichel e...@elcaudio.com; Surround Sound discussion group
sursound@music.vt.edu
Sent: Sunday, February 24, 2013 5:46
Greetings All,
I’ve much enjoyed the recent post, particularly Dr. Peter L’s comments
regarding “auditory looming” and the like. Not too long back I took a
psychology class (yep, still a student) on perception. But unlike the
perception classes I had in the past, there was very little emphasis
For those who do not have access to Spatial Hearing: The Pyschophysics of Human
Sound Localization, Revised Ed. By Jens Blauert, I have provided a few
sentences from this book. Another book that is recommended is Binaural and
Spatial Hearing in Real and Virtual Environments by Gilkey and
Hi Steve,
Thanks for writing and sharing your interests and insights (Sursound Digest Vol
56, Issue 2). It is always interesting to get input from people with different
backgrounds, and it sounds as though you have an extensive background in the
recording arts and music production.
I know
Hello Guilherme,
I have some insight regarding your question re KEMAR and the Neumann acoustical
test fixtures/heads.
Briefly, KEMAR was designed with hearing science in mind. The torso was
designed to approximate average human size (I think we have, on average,
grown since the introduction of
Greetings All,
Binaural recordings, HRTFs, and headphone listening are popular topics among
many of us. Regarding ear shape and head size, I'll have to read more on what
is of greatest importance for accurate localization. Here are a couple of
resources that I just downloaded:
On the
Greetings,
Some of the first binaural recordings I made were with the Core Sound mics
attached to my glasses frame (mics very close to conchas, but not in the ears).
I also made recordings of traffic sounds using the same mics and with a
KEMAR--the mics, however, were in the KEMAR which then
Hello Etienne and all Sursound Readers,
Many thanks for your response, insight, and “food for thought”. You brought up
interesting points which, in turn, prompted me to dig deeper into Ecological
Psychology (referring to the Gibsonian school).
There’s certainly something to be said for
Referring to my last post (moments ago) the following paragraph is in error.
Another area I would be interested in investigating is time-to-contact as it
applies to hearing (Gibson was mostly involved with vision), and how binaural
implantation might improve a listeners sense of safety in
the cuff, so I won’t give any
references to peer-reviewed studies (but then, who needs peer review when the
answer comes from Eric Carmichel?). Second disclaimer: I assume you already
know a lot of what I wrote below--if I explain something that is either
“obvious” or well known, it’s only
a
whole lot about how we listen. Of course, just as with hybrid mixing, the way
to avoid potential pitfalls or danger in a research or clinical environment is
to avoid the lossy file types altogether.
Best,
Eric Carmichel (also not to be confused with Eric Carmichael--my last name has
an unusual
in chat groups). The
problem a newbie can run into is when two 'experts' disagree. Glad there's an
accepted standard that's (mostly) impervious to change.
Best,
Eric C.
Eric Carmichel wrote:
...
Are all lossless formats more-or-less equal in
terms of 'purity'.
Eric B has already addressed
Greetings,
Many thanks, Peter and Mark, for your highly-detailed and informative
responses. There’s a lot to digest.
I have an interesting thought on new media and man’s proclivity toward photos,
audio recordings, books, etc. I’m not speaking for everyone, but I’ll confess
that I have a certain
Greetings,
In response to “I’m curious what the next ‘medium’ may be, and how surround
sound will be shaped by paradigm shifts,” Dr. Lennox wrote:
“I’d bet that one day we’ll discern a difference between ‘surround sound’ and
‘3-D sound’, where the latter contains a great deal more depth of
Hello Mark,
That's interesting about the child's voice/whisper. I worked in electronic
warfare and communications while in Air Force (during the short-lived Gulf War
era), but never heard anything aside from (female) voice warning systems.
Perhaps child's voice too subliminal (depend, of
Greetings Everyone,
This may be old news for Sursound readers and AES members, but I just learned
today that Edward T. Dell, Jr. passed away in late February. I apologize if
this is repetitive, but I don't recall any prior post regarding Mr. Dell's
passing.
For those who may not recognize his
Just received an email which - seems someone else is reinventing the Soundfield
again - see http://www.quaud.io/
This time it's based on mems microphones and is very small so it ends up using
blind source separation in order to get good source-interference ratios.
There's only one reference to
SNR wouldn't have been my initial concern because I have some wee-tiny
electrets that have (purportedly) +10 dBA noise--pretty low for a small
capsule.
When I think of the classic multi-polar mics such as the
AKG-414, the multiple patterns are often derivatives of back-to-back
diaphragms
I truly appreciate your informative and highly detailed response. For
helping understand spherical harmonics (or Legendre polynomials?), and
for mics lying on surface of a sphere, this helps a lot.
But here's what
I don't understand about the quaud (quaud.io) mic: They say the four
Hello Matthew,
I know you already received accurate and detailed responses to your question,
but thought I'd add something.
The ears, by themselves, are essentially omnidirectional. They're akin to most
pressure mics with no rearward venting. The head shapes the sound (ITDs,
ILDs... the stuff
I read the comments regarding mh Acoustics' eigenmike. Of interest was the
topic of off-axis coloration (particularly FA's response and explanation).
Off-axis coloration is often used to *advantage* -- at least when a certain
characteristic sound is desired. When you consider how differently
Greetings All,
I just registered for an upcoming audio conference (primarily recording) in the
US. I thought I'd pass the URL along for those who may be interested. The list
of sponsors is impressive--I'll be curious to see what surround gear is
displayed or introduced.
Anybody on the list
Over the months, I’ve read a couple of posts asking whether it is possible to
extract or synthesize surround channels from binaural stereo or non-Ambisonic
surround formats. I am now attempting to do something that would appear to be
simpler and more straightforward: that *something* being the
Hello Everyone,
First, many thanks for responses and insights to my recent post (Testing left,
center, right...).
I look forward to trying Fon's suggestion--I'm always game for a listening
experiment as long as high SPLs aren't involved.
Regarding Dave's post and the following link:
**This
Greetings All,
I have a friend who's an advocate of the Decca Tree mic arrangement. Many of
his recordings (a lot of choir and guitar) sound quite nice, so I looked into
aspects of the Decca Tree technique. For those who may not be familiar, the
*traditional* Decca Tree arrangement is comprised
image as the delayed or non-delayed source--the sounds have always come from
discrete speakers/locations.
Thanks again for help and link.
Best,
Eric C.
From: Aaron Heller hel...@ai.sri.com
To: Eric Carmichel e...@elcaudio.com; Surround Sound discussion group
From: JEFF SILBERMAN ambis...@pacbell.net
To: Eric Carmichel e...@elcaudio.com; sursound@music.vt.edu
sursound@music.vt.edu
Sent: Thursday, June 27, 2013 7:32 PM
Subject: Of stereo miking, Fourier analysis, and Ambisonics
I agree with your criticism, of course
Re: Of stereo miking, Fourier analysis, and Ambisonics
***excerpt from previous post: ...Instead of the required condition for the
latter - the signal being limited in bandwidth - the condition for the discrete
spectrum being a complete (i.e. invertible) description of the signal is that
the
Hello Goran,
I enjoyed your post (re Sursound Digest Vol 59 Issue 27). I'm a big fan of
Ambisonics, as I'm sure nearly all readers here are. But Ambisonics doesn't
cover all bases, and (in my opinion) neither can any single miking technique.
What we often overlook is the quality or timbre a mic
This post is with regard to Sursound Digest, Vol 6, Issue 1; specifically, Dr.
Robert Greene's post:
**This whole discussion is to my mind a living illustration of why no progress
to speak of ever occurs in audio. Nothing is made precise, no one does any
experiments on what happens to sound
I was one of those kids who put round pegs in square holes. Out-of-the box
thinking didn't apply. Now I'm one of those adults...
Regarding recent posts: I don't think anybody wants to listen to pink noise
unless you're performing the exercises in Dave Moulton's Golden Ear training.
But
Greetings All,
The last part of the following quote is exactly the concern I have when it
comes to auditory research: **Gunther showed..., in the course of his
demonstrating that a phantom image is not physically equivalent to a real
source, even if is perceptually equivalent (to whatever
From having read over recent posts regarding *A higher standard of
standardness* (what goofball made this title?), it appeared that recordings
should not be fat or boring. At least fattening a recording has measurable
components: Aphex, for example, used known psychoacoustic principles to
Howdy All,
This is in response to **Reads well, but no. Both matters? Otherwise FOA
wouldn't work at all... Come on!**
Let’s say that instead of humans I wish to study the effects of acoustical
stimuli on birds, bats, or critters whose hearing exceeds that of human
perception. Or maybe include
Hi Stefan,
Thanks for your kind note. I like to read/hear all viewpoints because I then
have to think harder (difficult for my tiny, bifurcated ganglion of a brain).
One *problem* I have with using perceptual judgments of accuracy is that it
requires a priori knowledge of a population's
Anyone at this year's IBC might be interested in the launch of
Sennheiser's new microphone: the Esfera.
http://www.noodls.com/view/84DDC0FB08F1DCD3D116474D5EC49E93382C4A5F
Not sure on any other details as of yet so if anyone is going - could you
report back?
Thanks!
Esfera provides 5.1
Almost the exact opposite of surround is this from Disney
http://www.disneyresearch.com/project/ishin-den-shin/
Dave
Hello Dave and Everyone,
That is indeed interesting. While 'opposite of surround' may be true, I wonder
how this might improve SNR in a surround of noise (visual and audible
Greetings Everyone,
This post is, in part, a response to Michael Dunn's post, Ambisonics - short
intro article (Sursound Digest, Vol 63, Issue 1). I read the article and
followed the link to the TI Sensing Design Challenge 2013. The Design Challenge
is finding creative uses for Texas
First, many thanks for taking time to read my previous post (re sense of
direction--whole new idea). I am very pleased that a few people found
the concept useful. Below is an extension to the idea. Dave Malham
alluded to this idea (sort-of read my mind), and he also mentioned a
problem that
Greetings,
RE
**I am in the process of acquiring a Surround Mic. Ideally with the Ambisonic
technology. Has anyone ever used the Core Sound Tetramic and if so, could you
provide a evaluation. Thank you.
**Laurent
**if you can live with flimsy connectors and four separate phantom power
that it is not the entire digest, but just
the post you are replying to - this will keep the archive useful and not
polluted with extraneous posts.
Today's Topics:
1. Ambisonics recording of LOUD night club or venue? (Eric Carmichel)
2. Re: Ambisonics recording of LOUD night club or venue?
(Sampo
86 matches
Mail list logo
