Re: [ARSCLIST] Early Stereo 1881 and 1931 (Was - Dynadoodoo

[Mike Gray <mhgray@xxxxxxxxxxx>]

Digging in the files ... here's a list of what's on those Blumlein TTs:

From memo dated 19th December 1933:

Recorded Room 1006 from Auditorium December 14, 1933:

5767-1 Blumlein, Westlake, Trott and Harker talking in auditorium (Blumlein
and Westlake in front)
5767-2 As above but different arrangement - Blumlein back.
5767-3 All walking and talking in muddle (changing position)
5767-4 Talking in turn (2 pairs) more slowly.  (Muddled change overs)
5767-5 Heavy shuffle - difference channel reduced by 3 db. As No.(4) for
auditorium arrangements.
5767-6 Heavy shuffle and difference channel reduced 3 db. Blumlein walking
in auditorium.

Recorded Room 106 from Auditorium-December 15th 1933:

5768-1 Talking and walking in auditorium. Blumlein only. Heavy shuffle.
Diff. channel 10K ohms and 70 ohms
5768-2 As for No.(1) for auditorium arrangements. Light shuffle 10K ohms
70 ohms, 40 ohms
5768-3 Westlake, Trott, Harker, Turnbull talking in turn. All shuffles as
specified.
5768-4 As No.(3) for auditoruim arrangements

Records made at Abbey Road with Binaural Gear (11th & 12th Jan 34)

TT.1557-2 Dance band with microphones approximately 45 ft distant.
TT.1557-1 Microphones as above.

WT.5769 Three pianos converging towards standard HB microphone. Outer pianos
make angle approximately 60 degrees with each other.  
-1 Binaural microphones approximately 12 ft from tip of each piano. Potting
A (lateral = 26), B (H.and.D) = 22
-2 As 1 but potting reduced to A = 22, B = 18
-3 Repeat of (2) with potting A = 22, B = 20
-4 Binaural microphones advanced 6 ft. nearer pianos (now approximately 18"
behind HB microphone)  Potting a + 18, B = 16
-5 Microphones restored to original position, 1.d., as for subs (1), (2) and (3)
-6 Microphones withdrawn to approximately 25 ft from ends of pianos. 
Potting A = 26, B = 24

Subs 1, 2 and 3 are of Hungarian Rhapsody [sic] Brahms
Subs 4 and 5 of Ride of the Valkyries
Sub 6 consist of snippets of rehearsal after session had finished.

Records cut at Abbey Road on 19th January.1934 (memo dated 22nd January, 1934)

Test WT5771 sub 1 to 9
Sir T. Beecham and L.P.O. playing Mozart's 'Jupiter' Symphony.

All subs cut with heavy shuffling and 6 db. sharp boost at 5000 c.p.s.
-1 Microphones approximately 13' high and approximately 12' from nearest
first violin.
-2 As sub. 1 but Pt. of Symphony.
-3 Microphones moved approximately 6' further back and 1'higher.
-4 As sub 3 but potting [different]
-5 Microphones approximately 7' further back, i.e., approximately 25' from
nearest first violin. Pt. 3 of Symphony.
-6 As (5) but potting [different]
-7 As (5) but potting [different]
-8 Microphone position as for (5) but potting [different] Pt. 4 of Symphony
-9 As (8) but potting [different]

According to the Technical Test master book, 7554 were made in the No. 1
Studio, recorded in the No. 4 m/c room; 7557, labeled 'Binaural Test for Mr.
Holman', were also recorded from the No. 4 m/c room.

Additional tests appear on TT5765-1, -2, -4 Recorded Room 106 (from 2 records)
Test of Binaural P.O. and recorder. Two channels singly and then both
together.  TT5749 Recorded room 106 (from pick and speech mic.) 1 channel
speech/1 channel P.U.


Regards,

Mike Gray