[geoff]

On 5/07/2015 6:21 a.m., PStamler wrote:
To go way back in this discussion...one reason to digitize LPs is to
avoid the pain-in-the-ass aspects of record cleaning. Also record
centering -- a lot of LPs were made with the stampers a little
off-center, and the wow is extremely audible. You can get it centered
right, digitize it, and not have to deal with centering again.

Peace, Paul


And the CD will faithfully reproduce all the nuances imparted on the
music during the transcription.

geoff

[Scott Dorsey]

wrote:
Now theres an idea for a dsp function
Automagic wow removal.

If you can tell the sw the rpm and hence the rep rate of the wow
it should be pretty easy to recognize and remove it.

Somebody probably already did it.

We tried something like that in the early nineties.... it was problematic
because it relied on the turntable speed being absolutely precise. First
problem was finding a point in the record where the pitch was at the highest
or lowest and putting that number into the program, the second problem was
judging how much the pitch actually shifted from apogee to perigee and
putting that number in. Then, if the transcription had been done at perfect
speed, the program would go through and normalize everything. It kind of
worked but took a lot of trial and error.

In the end it was just a lot easier to center the record by eye and get a
proper dub in the first place.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."