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Audiological Anomaly, Runout Groove
Posted: Thu Aug 06, 2015 7:29 pm
by winsleydale
I was digitizing some new records when I came across something strange. I use Audacity to make the files, so in order to effectively remove noise (and only noise) I have to ensure that I have a lot of lead-in and runout groove sound to profile. While digitizing a copy of "Razzberries", I detected a strange, very loud metallic sound about 5 or 6 seconds after the song ends, just before the groove locks. A file is attached. What could have caused something like this? A dropped instrument, perhaps? Maybe somebody bumped the recording horn, causing it to ding???
Re: Audiological Anomaly, Runout Groove
Posted: Thu Aug 06, 2015 7:58 pm
by GrafonolaG50
almost sounds like a piano key or marimba key being accidentally struck
Re: Audiological Anomaly, Runout Groove
Posted: Thu Aug 06, 2015 10:24 pm
by CDBPDX
Sometimes when I digitize 78s, I get odd noises and it occasionally ends up being some background computer thing that is accompanied by a sound. Took me a while to figure out how to avoid that. Just tossing this out as a possibility. If the noise occurs every time you play the record, then it is the record and I don't have a clue what it could be.
Cliff
Re: Audiological Anomaly, Runout Groove
Posted: Thu Aug 06, 2015 11:40 pm
by Roaring20s
I have two two records that have sound in the run-off.
One is a continuous last note and the other has a voice repeating.
James.
Re: Audiological Anomaly, Runout Groove
Posted: Fri Aug 07, 2015 11:10 am
by Retrograde
Roaring20s wrote:... a voice repeating.
James.
What does it say... "I buried George Paul"?
Re: Audiological Anomaly, Runout Groove
Posted: Fri Aug 07, 2015 6:55 pm
by VintageTechnologies
Retrograde wrote:Roaring20s wrote:... a voice repeating.
James.
What does it say... "I buried George Paul"?
Only when played backward. You youngsters wouldn't understand.
Re: Audiological Anomaly, Runout Groove
Posted: Sat Aug 08, 2015 7:27 am
by edisonphonoworks
sounds like someone hitting the recording horn to me.
Re: Audiological Anomaly, Runout Groove
Posted: Sat Aug 08, 2015 10:00 am
by Henry
Retrograde wrote:Roaring20s wrote:... a voice repeating.
James.
What does it say... "I buried George Paul"?
Maybe it's "I found Jimmy Hoffa."
Re: Audiological Anomaly, Runout Groove
Posted: Mon Aug 10, 2015 5:53 pm
by Roaring20s
Retrograde wrote:Roaring20s wrote:... a voice repeating.
James.
What does it say... "I buried George Paul"?
Cranberry sauce! 
This is a Fess Williams disc...
How about, "get my fee"?
James.
Re: Audiological Anomaly, Runout Groove
Posted: Mon Aug 10, 2015 7:03 pm
by tinovanderzwan
edisonphonoworks wrote:sounds like someone hitting the recording horn to me.
it din't happen very often but it did sometimes there's a fonotipia recording of jan kubelik playing drdla's serenade and hitting the horn at a bout 14sec into the recording
hearing horn bongs in runout grooves could mean one thing the horn must have hit the wood exit hole of the panel deviding the studio from the recording room
to make a runout groove the technician had to turn a crank to make the groove space enlarge
maybe he turned the crank a bit too wildly and the horn hit the wood on the square exit hole with the fibration of the winding?
tino