[78-L] Choral key question

[David Lennick]

On 12/20/2013 9:59 AM, Don Cox wrote:
> Hello David
>
> On 19/12/2013, David Lennick wrote:
>> Got an interesting problem here, a group of 4 sides recorded by Decca
>> in 1937, possibly on portable equipment, of a gospel group with piano
>> accompaniment in Chicago (or by a team from Chicago on remote), and
>> the speed drops radically on each side. Around 5 percent. My problem
>> is to figure which key they're singing in! Obviously a good
>> accompanist can play in just about any key, but which seems more
>> likely, A or A Flat? (Okay, or G Sharp?) To start in A I need to go up
>> close to 7%, and end the side around 2.2% up. A flat sounds a bit more
>> natural but the sides will end up 4% down at the end. Any thoughts,
>> choirmasters?
>>
> Can you detect any mains hum ?
>
> Regards
None. I've used that in the past, although in one instance I was dealing with 
dubbed lacquers so I couldn't tell whether the hum was in the dub or the original.

dl