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echo: tech
to: Charles Angelich
from: Russell Tiedt
date: 2003-03-01 13:16:22
subject: 16 rpm LP

Hello Charles.

27 Feb 03 15:36, you wrote to me:

 RT>> Hmm ... had a peek at Goldwave, and the slow down feature
 RT>> in my copy only goes to .50, and if my math is any good, I
 RT>> need around .48 to go from 33 1/3 rpm to 16 rpm.

 CA> The .50 would be close enough to be undetectable for all but
 CA> the 'golden ears' out there. :-)

I got pretty good ears, tho I will not claim "golden ear" status, but my 
hi-fi equipment, CD, player. turntable, amps and speakers cost me just over 
3x the price of my car. :-)

the .50 stting just might turn out to be perfect anyhow, as someone pointed 
out that 16 rpm LP's actually are 16 2/3 rpm discs.

 CA>>> Let me know how this works for you. If it doesn't I may
 CA>>> have other suggestions by that time. ;-)

 RT>> It would seem that CoolEdit has a option which will allow
 RT>> me to do this, must get a hold of that 16 rpm LP and free
 RT>> up some HDD space, and give it a bash. :-)

 CA> Any well-written WAV editor that you want to use is good.

Hmmm ...

 CA> My only concern would be to not do damage to the original record.
 CA> I would use an LP needle for this as the irregularities in the
 CA> 16 rpm would have to be closely spaced to achieve fidelity at that
 CA> rpm.

Agreed.

 CA> Use a 'test' record to get all the volumes adjusted properly so
 CA> that you can snatch the audio the first time with the 16 rpm
 CA> and not have to rerun it multiple times at this higher 33 1/3
 CA> rpm.  Try for 70-80% on SU meters to avoid clipping of high
 CA> frequencies since this will be a 'chipmunk' recording (sort of) there
 CA> will be a preponderance of high freq audio at first.  You may have to
 CA> reset the volume since the 16 rpm audio will be 'distorted' a bit by
 CA> the use of the wrong speed. Hopefully not more than 2 or 3 times to
 CA> grab good audio and write the WAV file.

Have no intention of playing it more than once, unless I absolutely have to, 
and my system is setup to just over 80% on SU meters, once recorded I then 
"normalize to 95% via software.

 CA> Let me know what you find when you get there. ;-)

Will do. :-)

Russell

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