I've also noticed two distinct EQ settings in the Deccas around 1940 . One 
makes Bing's voice very heavy and boomy. The other is more natural sounding. 
It starts happening about 1939 or so-Mickey

-----Original Message----- 
From: Michael Biel
Sent: Friday, February 19, 2021 4:26 PM
To: [log in to unmask]
Subject: Re: [ARSCLIST] Decca 1945 take numbers

They may have been running the 16s as safeties, simultaneous with the 78s. 
Not all their recordings were made at World studios.  I’m not sure when they 
started, nor if some were lateral masters. World was doing verticals back in 
the early 30s, but many were done simultaneously on lateral and vertical. I 
have a pair of World test pressings of the same 1935 Ford program, one 
lateral and the other vertical. Same take.

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________________________________
From: Association for Recorded Sound Discussion List 
<[log in to unmask]> on behalf of Mickey Clark <[log in to unmask]>
Sent: Friday, February 19, 2021 7:15:56 PM
To: [log in to unmask] <[log in to unmask]>
Subject: Re: [ARSCLIST] Decca 1945 take numbers

Michael - Well, that clarifies things. So... when did Decca stop using the
vertical masters? And the missing W is another take from the one with the W?
Thanks for chipping in about this. I have 994 audio files in my Crosby
directory now - all from original 78s from my collection . Albeit, some are
temporary working files just now so not a true number of songs. At the most,
about 20 working files at the present. I have so many alternates and
duplicates on different serial numbers - some from a spread of five years
between sides - Mickey

-----Original Message-----
From: Michael Biel
Sent: Friday, February 19, 2021 2:29 PM
To: [log in to unmask]
Subject: Re: [ARSCLIST] Decca 1945 take numbers

T does not mean tape. It means Transfer, as in Transfer from 16-inch Western
Electric Wide Range Vertical master disc. That also is what the W on Deccas
stands for. Notice the missing W on the non transferred one?
Mike Biel

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________________________________
From: Association for Recorded Sound Discussion List
<[log in to unmask]> on behalf of Mickey Clark <[log in to unmask]>
Sent: Friday, February 19, 2021 3:25:41 PM
To: [log in to unmask] <[log in to unmask]>
Subject: [ARSCLIST] Decca 1945 take numbers

Hello-I have two copies of Decca 23547 – Siboney and Hasta Manana by bing
Crosby with Xavier Cugat.

Both sides have this aberration.

Siboney on the Canadian issue – the MX is L3535B – dating from February 11,
1945
Siboney on the American pressing is WL3535T6B

I am just recording the one with the T and will compare the recordings once
recorded.

Does a firm date exist for when Decca started mastering on tape? I have seen
this before, but on records that would have preceded the tape process -
Mickey