| Meetings
and other Notices |
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September
2022 ONLINE MEETING
Date: Saturday,
September 3, 2022, 2:00 PM
Place: ZOOM
FEATURED GUEST:
CEO of Zylia, Tomasz Zernicki,
www.zylia.co
(Headphones Required to experience the Best
of 3D Audio )
TOPIC: Zylia
6-Degrees of Freedom (DoF), Volumetric Audio
production for the Metaverse and Virtual Concerts.
Our ZOOM meeting Saturday
will require participants to have available
headphones to listen to binaural audio recorded
with a Zylia, multi-capsule microphone. This
should be an exciting and educational meeting
due to the advancing field of technology involved
in multi-capsule recording technology, and
the role it will play in our future recording
menus. The ZYLIA ZM-1S microphone has a 19-capsule
array. All are equipped with XENSIV™
digital MEMS microphones from the German-based
Infineon Technologies. Each capsule has a
69 dB signal-to-noise ratio, 105 dB dynamic
range, high output linearity, and handles
up to 130 dB Sound Pressure Level.
The Zylia ZM-15, according
to its promoters, delivers 6-Degrees of Freedom
and delivers ‘Navigable Audio’.
Unlike the current two microphone approach,
the Zylia engineer records an entire sound
field around and within any performance. This
means for the listener while listening to
a recording made with the Zylia, he/she will
experience the same 6-DoF available at a live
concert. The listener can walk through the
recorded audio space freely as if he/she was
at the live concert. For instance, you can
approach the stage, or even step on the stage
to stand next to the musicians. As in the
case of a real-life sound scene the sound
you hear will be different at every listening
position, as in the case of a real-life sound
scene.
Tomasz Zernicki’s
presentation will explore:
1. How can the Metaverse and XR offer
a vast playground and revenue source for the
music industry?
2. How do I get started in XR if I'm
an independent music-maker or label?
3. What are the leading platforms and
tools to develop volumetric audio?
4. The strategy for recording sound
and enabling six-degrees-of-freedom playback,
using multiple simultaneous and synchronized
Higher Order Ambisonics (HOA) recordings.
Many BAS members are
involved in creating live concert recordings.
Saturday’s presentation will be our first
look into the possible future of live concert
recordings.
Webmasters'
note: to attempt to quantify and understand
some of the above specs, have a look HERE
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Join
the Zoom Meeting !
If you are using a computer
and this is your first time with Zoom, please
give yourself at least 15-20 minutes
prior to the meeting to set things up: you
click on the link in the Zoom instructions
below and will be guided to download the
Zoom software, HERE:
https://zoom.us/download
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THE
BAS MESSAGE
August 2022 |
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1. Our recent
in-person meeting with Leo Ayzenshtat of Orchard
Audio had many graphs of his products' performance.
One caught my eye, labeled THD versus Level.
It showed the characteristic apparent rising
distortion at low levels of a THD + Noise
plot. The definition of THD is a sum of specified
number of harmonics and does not include noise.
Unless there is crossover distortion the plot
will show diminishing distortion as the level
is dropped, until the harmonics fall into
the noise. A narrow band analyzer can be used
to chase the harmonics below the noise.
I contacted Audio Precision,
the maker of the hardware/software he's using,
and got an opaque and evasive reply. Not satisfactory
for a company of their reputation.
2. The new issue,
V43N1, of the BAS Speaker will be published
shortly. It features AXPONA and CES reports
and is the first issue under my editorship.
I hope you enjoy it.
email me here
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Below,
other meetings and notices which
may be of interest to BAS members |
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MAHLER
3
In the recent
(April 2022) performance of Mahler’s Third
Symphony at Boston's Symphony Hall by Ben Zander
and his Boston Philharmonic, the recording was done
with the three main spaced omnis with two more farther
back. No accent mikes or chorus microphones were
used nor, it turns out, were they needed. Remarkably,
this produced a recording that is as close to the
Symphony Hall experience as may be possible.
The info is
here: www.bostonphil.org/concerts/2021-2022/bpo4-mahler3
Here is the
recording in its entirety as a single .WAV file;
44k / 16 bit; 1hr 47 min
Mahler
Sym 3 CD.wav 1.1GB
(For those of you with editing software note that
the .wav file HAS markers to denote the movements.)
Here is the
exact same Symphony 3 with the movements separated
as FLAC files, 48k / 24 bit as a ZIPped file:
Mahler
3 Zander as FLAC.zip 1GB
IF you'd like
further Gustav Mahler info... https://en.wikipedia.org/wiki/Gustav_Mahler
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Shop
Talk
Shop Talk was
a WBUR program about Hi Fidelity, music, speakers,
tape recorders, etc. Enjoyed by many during the
1970s, the program's format was ‘talk’
and interviewing major audio luminaries. It was
a forerunner of the popular program Car Talk!
Peter Mitchell and Dr. Richard
Goldwater were the original hosts. They were later
joined by Brad Meyer. Here, John Allen interviews
Scott Kent:
Shop
Talk John Allen talks to Scott Kent on SPEAKERS.mp3
(81Mb 1:27)
Shop
Talk John Allen talks to Scott Kent on TAPE RECORDERS.mp3
(79Mb 1:26)
There is also an episode track
on the BAS
CD and here is that Description:
Track 12. "Shop Talk",
WHRB-FM, November 5, 1984.
Peter Mitchell (on the left), Richard Goldwater,
MD (center) and E. Brad Meyer (right) introduce
the show with a 1932 stereo recording and prepare
to talk with guests Mark Davis and David Moran,
both then of dbx corporation.
Shop Talk, which through most
of its ten-year life on WBUR featured just Mitchell
and Goldwater, was the precursor of Tom and Ray
Magliozzi's "Car Talk". As we finished
our 9:00-10:30 stint every Saturday morning, Tom
and Ray would take our places and begin joking
with each other. Eventually the station manager
figured out that they were funnier than we were,
and that more people drove cars than owned hi-fi
equipment, and fired us. Until then, the show
publicized the Boston Audio Society, vastly increasing
attendance at our monthly meetings. The show came
back for a time during the '80's on the Harvard
station WHRB, where we appeared once a month as
guests of HRB stalwart David Elliott. [EBM]
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| BAS
MICROPHONE CLINIC REPORT ! |
| In September 2009
the B A S held a microphone clinic, testing 37 different
microphone models. The ambitious nature of the clinic
effort, the extent of data collection, the number
of individuals involved in microphone testing and
in writing various sections of the report, and the
complexity in determining how to construct the clinic
report and make it available to members resulted it
not being published until now. The dataset is extensive.
Representative samples were
included in the abbreviated report in "The
B A S Speaker"
(Fall 2015; v37n3)
Go to the MICROPHONE
CLINIC PAGE for more...
...and don't
forget, here is the master
list of microphones in the world
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When collecting
and plotting "noisy" data
it is often useful to have Microsoft
Excel plot a Trend Line through it.
If that data is to be used for
further work, it may be necessary to
have an X-Y table of the Trend Line.
That is not easy to get and this paper
will show how to do it.
Joseph DeMarinis
has an article here: Extracting
Numerical Data from an Excel Trend Line
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Foster's
Test Bench !
by Alvin Foster ! Click
the logo: —> |
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The rapidly-becoming-famous
BAS Headphone Test Article is
now available in the BASS VOLUME
25, ISSUE 4, on Page 17, available
HERE
PDF 3mb |
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Visit
our PODCAST PAGE
for:
The LIVE video podcast of our meetings,
Archived video of past meetings (only
one so far!),
and Audio Podcast interviews by Alvin
Foster |
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There is a supplemental
and further explanation addendum paper to the
E. Brad Meyer / David Moran paper published
in the September, 2007 issue of the AES
Journal. That page, which documents
the experimental protocol and audio systems/source
material is here:
www.bostonaudiosociety.org/explanation.htm
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| There
is a Power Point Presentation of the lecture
given by Dr. Barry Blesser at the March 2007
Meeting. The Meeting page synopsis is HERE;
the Power Point Presentation (as a web page)
is HERE |
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Some earlier
BASS issues, previously available only
directly by mail, are now available online,
on the BAS SPEAKER page, HERE
Show your
appreciation for the immense amount of dedicated
work that went into both the original writing,
gathering, editing and printing, PLUS
the more recent scanning and conversion to
PDF format, by joining the Society, HERE
!
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A
L L O F F S I T E L I N K S O
P E N I N T O A N
E W W I N D O W
- AND FOR CONVENIENCE
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