78 RPM recorded @45 RPM restoring w/Speed-Pitch Change

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saxking20
Posts: 10
Joined: Sat Nov 11, 2006 12:52 am

78 RPM recorded @45 RPM restoring w/Speed-Pitch Change

Post by saxking20 »

I have no 78 RPM turntable so am recording the record to Amadeus Pro at 45 RPM and attempting to change the pitch/speed in A-Pro. I've arrived at 175% as the approximate correct increase in speed=time on 78 label.

My question:

If I select the LOCK, is the pitch correct when the speed is increased to 175%?
Charlie in the swamp

Gerard Bik
Posts: 353
Joined: Fri Nov 10, 2006 9:04 pm

78 RPM recorded @45 RPM restoring w/Speed-Pitch Change

Post by Gerard Bik »

It should be. The calculation is ok.
I remember some discussions about recording 78's in the past. Maybe you could search the forum.

Gerard


I have no 78 RPM turntable so am recording the record to Amadeus Pro at 45 RPM and attempting to change the pitch/speed in A-Pro. I've arrived at 175% as the approximate correct increase in speed=time on 78 label.

My question:

If I select the LOCK, is the pitch correct when the speed is increased to 175%?

------------------------
Charlie in the swamp




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CDJonah_alt
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78 RPM recorded @45 RPM restoring w/Speed-Pitch Change

Post by CDJonah_alt »

Will need to equalize the sound -- not quite sure how one would do it
with standard equalization curves.

Gerard Bik wrote:
It should be. The calculation is ok.
I remember some discussions about recording 78's in the past. Maybe you could search the forum.

Gerard



I have no 78 RPM turntable so am recording the record to Amadeus Pro at 45 RPM and attempting to change the pitch/speed in A-Pro. I've arrived at 175% as the approximate correct increase in speed=time on 78 label.

My question:

If I select the LOCK, is the pitch correct when the speed is increased to 175%?

------------------------
Charlie in the swamp




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Unsubscribe / change settings at http://two.pairlist.net/mailman/listinfo/forum_list
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saxking20
Posts: 10
Joined: Sat Nov 11, 2006 12:52 am

Post by saxking20 »

Thanks for the answers. Guess I can always EQ to taste which may not be the best way. I do have good monitor speakers in my studio.

Thanks again.
Charlie in the swamp

pm@philxmilstein.com
Posts: 112
Joined: Sun Nov 12, 2006 6:55 pm

78 RPM recorded @45 RPM restoring w/Speed-Pitch Change

Post by pm@philxmilstein.com »

More accurately, the rate should be 173.333, which is the result of 78 ÷ 45.
I've used this same method to digitize 78s without a 78 player, and have
gotten some very acceptable results.

--Phil M.


saxking20 wrote:
I have no 78 RPM turntable so am recording the record to Amadeus Pro at 45 RPM
and attempting to change the pitch/speed in A-Pro. I've arrived at 175% as
the approximate correct increase in speed=time on 78 label.

My question:

If I select the LOCK, is the pitch correct when the speed is increased to
175%?

------------------------
Charlie in the swamp




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Amadeus forum mailing list
Unsubscribe / change settings at
http://two.pairlist.net/mailman/listinfo/forum_list
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rfwilmut
Posts: 255
Joined: Fri Nov 17, 2006 1:19 pm

Post by rfwilmut »

'Equalizer' from Brian Davies:
http://www.clickrepair.net/software_dow ... lizer.html
can correctly convert from RIAA (the microgroove standard) - including at the wrong speed - to a specified 78rpm EQ. See page 11 of the manual. It's free.

stevelee
Posts: 1
Joined: Thu Mar 22, 2018 7:25 pm

Re: 78 RPM recorded @45 RPM restoring w/Speed-Pitch Change

Post by stevelee »

pm@philxmilstein.com wrote:More accurately, the rate should be 173.333, which is the result of 78 ÷ 45.
I've used this same method to digitize 78s without a 78 player, and have
gotten some very acceptable results.
--Phil M.
In real life the speed of old 78s was all over the place. In theory, the real speed was supposed to be 78.26 rpm by somebody's standard, so the percentage would be 173.911 if a record really met that. That's a difference in pitch of 5 or 6 cents.

If you could be sure that the instruments were exactly in tune, you could look at the waveforms and fine tune to A=440. But perhaps one could find a scratch on the record and time its reiterations to 78 or 78.26 per minute.

Doing what sounds good might be as good a standard as any.

I'm researching this because I have a neighbor who had recordings made at the University of Illinois in 1949. For her 90th birthday present, I'm trying to digitize the records and then will make CDs for her and her family. I don't have 78 speed on my turntable, so I'm recording at 45rpm. I did buy a stylus for 78s to prevent damaging the records with an LP stylus.[/quote]

CDJonah
Posts: 119
Joined: Sat Nov 11, 2006 12:10 am

78 RPM recorded @45 RPM restoring w/Speed-Pitch Change

Post by CDJonah »

Of course the equalization curves are different and will also be shifted
as the frequencies are different.

On 3/22/18 4:50 PM, stevelee wrote:
pm@philxmilstein.com wrote:
More accurately, the rate should be 173.333, which is the result of 78 ÷ 45.
I've used this same method to digitize 78s without a 78 player, and have
gotten some very acceptable results.
--Phil M.
In real life the speed of old 78s was all over the place. In theory, the real speed was supposed to be 78.26 rpm by somebody's standard, so the percentage would be 173.911 if a record really met that. That's a difference in pitch of 5 or 6 cents.

If you could be sure that the instruments were exactly in tune, you could look at the waveforms and fine tune to A=440. But perhaps one could find a scratch on the record and time its reiterations to 78 or 78.26 per minute.

Doing what sounds good might be as good a standard as any.

I'm researching this because I have a neighbor who had recordings made at the University of Illinois in 1949. For her 90th birthday present, I'm trying to digitize the records and then will make CDs for her and her family. I don't have 78 speed on my turntable, so I'm recording at 45rpm. I did buy a stylus for 78s to prevent damaging the records with an LP stylus.

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