| Meetings and other Notices |
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| The
September Zoom Only Meeting |
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Date: Sunday,
September
28, 2025, 2:00 PM EST
Featured Guest: Perry
Marshall,
DIY Live
Edge
Dipoles
Topic:
Room
Reflections
-
Live
Edge
Dipoles
An
Exciting
Event
for
BAS
Members
and
Guests
BAS
members
and
guests
will
have
the
opportunity
to
attend
a
remarkable
presentation
at
the
September
meeting.
The
featured
speaker
will
be
Perry
Marshall,
who
earned
first
place
in
the
Dayton
Audio
Speaker
Design
Competition.
Competition
Success:
Open
Unlimited
Category,
Parts
Express
2023
Speaker
Design
Competition
Perry
Marshall
took
part
in
the
Open
Unlimited
category
of
the
speaker
design
competition,
where
entrants
could
use
any
components
and
design
speakers
without
cost
restrictions.
Among
a
field
of
59
contestants,
Perry’s
DIY
‘Live
Edge
Dipoles’
were
awarded
first
place.
Judge
Jerry
McNutt
commented,
“The
best
way
to
not
sound
like
a
box
is:
Don’t
use
a
box.”
Understanding
Dipole
Room
Loading
Frequency
Response
During
the
meeting,
Perry
will
present
graphs
and
tables
to
support
why
the
dipole
room
loading
frequency
response
is
particularly
well-suited
for
home
playback
environments.
Featured
Recognition
Perry’s
Live
Edge
Dipoles
were
featured
on
the
cover
of
AudioXpress
magazine
in
January
2021.
The
accompanying
article
offers
a
detailed
description
of
the
system
as
it
was
at
the
time.
For
further
reading,
see
the
article
at
https://audioxpress.com/article/you-can-diy-perry-marshall-the-live-edge-dipoles
or
visit
tinyurl.com/LiveEdgeDipolesAudioXpress.
Boston Audio Society
PO BOX 260211
BOSTON MA 02126
617.271.6588
Join Zoom Meeting
Ken Schwarz is inviting you to a scheduled Zoom meeting.
Topic:
Room
Reflections
- Live
Edge
Dipoles
Time:
September
28, 2025 02:00 PM Eastern Time (US and Canada)
Join Zoom Meeting
https://us02web.zoom.us/j/85173870757?pwd=2ep0UmpgbrUoaJgtnSwTziWLycoa6s.1
Meeting
ID: 851
7387
0757
Passcode:
824987
One tap
mobile
+16469313860,,85173870757#,,,,*824987#
US
+13017158592,,85173870757#,,,,*824987#
US
(Washington
DC)
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Hope to see you then.
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THE BAS MESSAGE
September 2025 |
Miscellaneous News
1.
The BAS is looking for a new webmaster. The current webmaster will train you and hand it over to you, and provide support as necessary. The website is written in simple HTML. You will need a computer and a high speed internet connection (you will need to download a 6GB backup in a reasonable amount of time). $300 is the annual payment. You may be asked to support admin of the BAS Facebook pages as well.
2.
Notre Dame
In the wake of
the April 2019
fire at Notre
Dame,
acoustician
Brian F.G. Katz
feared that
visitors would
never again have
the experience
of the unique
acoustics of the
church. Yet in a
stroke of
incredible luck,
Katz found
himself in a
unique position
to preserve the
sound of
Notre-Dame. In
2015, his
research group
had collected
vast acoustic
data from the
cathedral, which
it had used to
create a
detailed 3D
computer model
of the
structure. Of
all the acoustic
labs in France,
his alone
possessed this
information.
The computer
model offered a
valuable
baseline, a
measuring stick
to ensure
builders
replicated not
just the look of
the pre-fire
cathedral, but
its unique sound
as well. Katz
has collaborated
with a team of
historians and
artists to
create immersive
walking tours of
Notre-Dame.
Together,
they’ve
re-created the
soundscapes of
the
neighborhoods
around the
cathedral during
a variety of
historical eras.
They’ve also
made it possible
to hear medieval
music as it was
originally
experienced
inside the
cathedral,
making history
come alive for
audiences
worldwide.
Today,
Notre-Dame,
which reopened
to the public
last December,
sounds more or
less like the
pre-fire building
did. Katz’s team
has already
measured the
restored
cathedral’s
acoustics to
document any
changes that
have taken
place, though it
may take up to a
year to analyze
the hours of
audio data
collected.
Brandeis
Magazine, Summer
2025
3. Audio
Magazine
Walt Jung is
parting with his
collection of
Audio Magazine
from 1958 to
2000, comprising
7 boxes weighing
30-40 lbs each.
He is located in
Maryland.
Best offer.
https://www.diyaudio.com/community/threads/audio-magazines-available-1958-2000.431349/
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Below, other meetings and notices which
may be of interest to BAS members |
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JUST RELEASED !
A fantastic historical video!
Ken Berger and Kenton Forsythe are the founders of EAW (Eastern Acoustics Works) and they discuss, with terrific overlaid graphics, the history of, well, pretty much every audio thing Boston from the early 70's.
18 minutes and right here: https://youtu.be/fPfQEK0b0mI
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A Boston issue - As MIX magazine reports:
Sound Museum owners cry foul as their tenants likely secure new spaces without them
While the headline sounds like someone has sour grapes, the complete story of how the closure of this crucial Boston rehearsal studio is being handled is far more nuanced and complicated -- particularly since it brings up issues of gentrification, government support of the arts, non-profits' ethics and more. Full Story HERE (WBUR-FM Boston (1/11/23)
And here's an update:
www.wbur.org/news/2023/01/25/charlestown-rehearsal-studios-musicians-boston
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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 T A B O R W I N D O W
- AND FOR CONVENIENCE -
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