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wax roll recordings

PostPosted: Sun Jan 07, 2007 12:25 pm
by jhaubrich
Thousands of wax roll recordings are available on the www, either
in mp3 or in wav format, or even both.
All have a terrible amount of noise/clicks or whatever might be the
right word to describe it.
In default settings, WaveCorr hardly removes anything from that
noise. I found out that even the lowest lever of hiss-filtering seems
to do quite a good job.
Is there anyone with some experience in this field, wishing to share
his findings?

PostPosted: Sun Jan 07, 2007 5:29 pm
by citguy
Hi Jacques. I have done a lot of 78's but never a wax cylinder. I think you will notice that the noise is not constant but actually has a varying pattern albeit a repeating one. I think the trick will be to get a "new profile" from a portion of the "lead in" noise that best represents what you want to filter. Then test the filtering before applying it. If you take too large of a profile you will get a sample that is not constant. I believe the minimum sample is .2 seconds. Severe surface noise is difficult to remove with out removing some of the recorded material. Others may have suggestions also. Treble cut helps in some situations.