On 7 June, 21:13, John Rumm wrote:
The Natural Philosopher wrote:
andrew wrote:
Whilst clearing out the loft at my mother's old house I have come across
some records. These were made in America in 1942 by her brother who was
training as RAF bomber crew. He died shortly after.

I think they are directly scribed into the plastic which is in poor nick,
possibly some mould growth. The discs are "Zenith Universal Recorder" and
probably done in some sort of booth.

I shall try and record them directly to wav files but before I attempt
that
what precautions need I take? I have a problem in that my record deck
only
has 33 and 45 rpm. Was mono 78 simply an amplitude modulation by depth of
the needle?

Think its lateral.

And a fairly big needle

You CAN get compatible needles to plug into standard cartridiges, and
there are still decks around that do 78.

Worth mentioning that you may still get better results from micing up a
real 78 record player. The difference in the weight of the tone arm can
make recordings from modern decks sound very light and scratchy.

There is also commercial softwa

http://www.dartpro.com/

that makes quite a good job of automatic scratch removal.

--
Cheers,

John.

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If you want to get really serious Computer Enhanced Digital Audio
Restoration, CEDAR

http://www.cedar-audio.com

Adam