nicketynick wrote:
> Thanks for the response Pat

you're welcome

>.  I'm using Nero wave editor to look at my
> recordings, which is where I notice that the peaks are running 15db
> lower on the loud bits, whereas if there is any difference in the
> silences, it is not as visible. This indicates to me that I've lost
> S/N, but db is logarithmic, right, so it's not as bad as it looks, is
> it?


Are you recording at 24 bits or 16?

You might want to take a quick look at
http://www.pfarrell.com/prc/bits.html

Look carefully at the lead-in or lead-out sections between tracks.
It should be all noise. If it is also 15 dB down, you have
sufficient headroom.

Of interest to this discussion is "we say that twice as loud, or one
more bit of data, is a tad over 6.02 dB"

so your 15 dB is two and a half bits. Out of 16, that is a fairly high
percentage, but out of 24 it is no big deal.

> I'm kind of winging it here - I just don't want to find out later that
> I should have done something differently, because then I'll be tempted
> to do it all over again! (and I'm already getting trouble for spending
> so much time on this little project!)

Converting LPs takes tons of time, far more than people expect. And for
me, it takes far more time than the $10 that most of my pop LPs cost as
CDs. But some of my folk and jazz LPs are out of print and important to
me, so they are worth the time.

For me, while I have both Cool Edit (now called Adobe Audition ) and
Sonar, and lots of plug-ins from my recording studio, I do not use any
noise reduction on converted LPs. All of the noise plug-ins have audible
artifacts, so I just live with the occasional pop. My LPs were well
kept, I had audiophile turntables (at least at the time they were) for
years before I went over to the dark side with CDs.

-- 
Pat
http://www.pfarrell.com/music/slimserver/slimsoftware.html

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