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Meetings and other Notices


DATE: Sunday, JULY 25, 2021, 7:00 PM EST

PLACE: Zoom online


TOPIC / ACTIVITY: Internal and necessary business items

Our ZOOM Meeting for July will be an ‘Open Forum’ for all viewers to contribute/present their latest research, interest, or project.

This opening gives the Society a rare chance to catch-up on internal and necessary business items, and is it this right time to return to in-house meetings?

David Hadaway will present his latest, well researched consumer information. Alvin Foster will talk about his latest good findings on the Zoom multichannel recorder, and his disaster experience with the DSP’s ambiMIK-1.

The second agenda item will include catching up on writeups of previous meetings for the newsletter. The BAS now pays meeting summary writers $150. Over the years, we have a backlog of unreported meetings. It’s easy, the entire meeting can be downloaded or supplied on a CD. How can we get more writer participation?

Please log in prepared to add to our ‘Open Forum’


Ken Schwarz is inviting you to a scheduled Zoom meeting.

Time: Sunday July 25, 2021 - suggest 6:45 PM Eastern Time (US and Canada)

Meeting ID: 894 1478 6087

Passcode: 989644

If you are using a computer and this is your first time with Zoom, 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:

You can use your computer’s audio if you have a headset attached, or you can dial-in for audio. If you have a smart phone or tablet and a good internet connection, then you should install the Zoom app for your device and connect using it.

See below for dial-in instructions for the Zoom meeting.

If you do not have a computer or smart phone/tablet, you can just dial one of the numbers and join for audio only; use your touch tone dialer to enter the meeting number and password when prompted.

Dial by your location

+1 646 558 8656 US (New York)

+1 312 626 6799 US (Chicago)

+1 669 900 9128 US (San Jose)

+1 253 215 8782 US

+1 301 715 8592 US

+1 346 248 7799 US (Houston)

or find your local number:
(scroll all the way down to 'United States of America')

July 2021

1. From the June 2021 Stereophile:

HiFi by the Pound? From the PrimaLuna ad: "$9k for a 15lb preamp?!
If you want to pay $9,000 for a 15 lb preamp with mediocre parts, that’s your business. If you want to pay 4,699 for a 53lb preamp crafted with the finest exotic parts, that’s our business.

Learn the truth on the PrimalLuna Youtube channel”

2. HYPSOS by Ferrum
Revolutionary power supply
Linear/switching hybrid design — 100-240V AC in — 5-30VDC out — 6A/60W

HYPSOS comes with one of the two high quality DC power cables fitted with a 5.5 x 2.5mm and a 5.5 x 2.1mm DC plug, to connect to the most commonly used DC inlets. Other DC plugs can be made to order. $995

3. I see MQA technology continues to be licensed. Have there been any rigorous tests?
Radio Paradise, an internet radio station, has signed an exclusive deal with MQA.

4. Need a recordist:
A friend is working on a multilocation recording project, and seeks someone to record one part of it: a calliope in southern New Jersey.
Requirements: ~two hours of music; anticipating two-mike stereo on one side, same on the other, plus a single mike at the end where the drum is located. Recording at 24bit/96k per channel is required. The time frame is within the next two months (sooner is preferable).
Contact me and I can put you in touch with the project manager.
David J. Weinberg (301-593-3230; )

email me here

Below, other meetings and notices which
may be of interest to BAS members

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...

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 a new article here: Extracting Numerical Data from an Excel Trend Line

Foster's Test Bench !
by Alvin Foster !    Click the logo: —>
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
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
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:   
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

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 !

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


AES Future Meetings

Acoustical Society of America
SMPTE New England

There is a posting of an ABX article, The Digital Challenge by Stanley P. Lipshitz HERE

Webmaster's Corner:

Once again, for 2021 - and onward - is THE useful industry calendar of audio/related events, with kudos to all who put this list together:

Separately, AV-IQ has their event page here:

For a fully comprehensve understanding of meetings taking place - both real and virtual - in this pandemic situation, you need to look at BOTH listings.



The Boston Audio Society
PO BOX 260211
Boston MA 02126

updated 7/18/21