Drop out? Not sure how one could get that.


Brian

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"Java Jive" wrote in message
...
Is there such a thing?

I have 256 *.wav files from recording my vinyls. Looking through
them, it is clear that there has been channel drop-out on at least
one, and that others look as they may have been recorded at too lower
a level. I would like to run a batch process that will report the RMS
on these files to give me an idea which and how many may need to be
re-digitised.

I have Windows programs that will batch process files to, say,
normalise the sound to peak at 0dB, or have a given RMS, but nothing
that will report the current RMS values without doing anything.

Any suggestions?
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Dodgy cartridge connections in the arm of the old turntable. It's
happens quite a lot but I usually notice it straightaway, remove the
cartridge holder from the arm, check the contacts, and replace it -
nine times out of ten that fixes it.

However, all the vinyl gear is downstairs, and my regular PCs are in
my bedroom-office upstairs. I've been running a production line
between the two recording the vinyls downstairs and scanning the
covers and inserts upstairs, and that particular side of that LP I
must have not waited to listen to it for a while to check everything
was going ok.

On Sun, 21 Aug 2011 10:40:44 +0100, "Brian Gaff"
wrote:

Drop out? Not sure how one could get that.
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In article , Java Jive
wrote:
Dodgy cartridge connections in the arm of the old turntable. It's
happens quite a lot but I usually notice it straightaway, remove the
cartridge holder from the arm, check the contacts, and replace it -
nine times out of ten that fixes it.

Some comments/questions...

If that happens so often than I'd also be worried that the contact is
non-ohmic at other times and so adding distortion.

Do you not clean the contacts with a non-residue cleaner?

If it keeps happening then it might be worth trying a new headshell.
Although of course the problem may be in the arm socket, so that might noit
help.

Also, to detect dropouts on material you aren't listening to during
recording it might be useful to

a) Look at plots of level vs time.

b) Look at the histogram for a cluster of low level readings.

Although that assumes the noise level falls when the connection fails,
which may not be the case.

If you have lots more to do, then either a change of player or some
software to detect bursts of low level might be useful. But I have no idea
how much time or effort you have to devote to this.

Slainte,

Jim

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