Re: Question re: levels in digital audio


Subject: Re: Question re: levels in digital audio
From: James Phelps (jimphelps_niucms@yahoo.com)
Date: Thu Oct 20 2005 - 10:36:16 EDT


For what it's worth ... the last time I dealt with a
somewhat major label (CENTAUR) they wanted the
composers' masters to be at -2dB. Maybe it was stated
"at least" -2 ... Larry Austin would be able to
correct me on this ...

-Jim

--- Michael Gogins <gogins@pipeline.com> wrote:

> In practice, digital headroom depends on
> circumstances. If you making a live recording and
> don't have a soft limiter, and you also don't know
> what sudden peak levels may occur, you need to leave
> extra headroom because a clip could be pretty awful
> sounding and hard to fix, so in such circumstances
> 12 dB could be correct. If you do have a limiter, or
> you have done a good sound check or otherwise know
> what peak levels to expect, you should reduce the
> headroom to as close to a decibel or so as possible.
> If you are normalizing a recorded soundfile and you
> do not expect to process it, it should be 0 to 3 dB.
> If you ae going to process a soundfile, you need to
> experiment to find the optimal headroom before
> processing.
>
> Regards,
> Mike
>
> -----Original Message-----
> From: Louis Dufort <siuol@sympatico.ca>
> Sent: Oct 19, 2005 11:58 PM
> To: cec-conference@concordia.ca
> Subject: Re: Question re: levels in digital audio
>
> Don't ever believe video guys ;-)
>
> -12 dB (digital audio) = 0dBVU in the analog world.
> But "au contraire" in
> digital audio you want to use all those bits to gain
> more resolution of your
> signal, so from -12 to 0 dB is perfect in the
> digital world. Where in
> analog, from 0 to +6 dB may give some saturation and
> eventually clipping.
>
> So basically it's all the way around.
>
> BTW, you should try to always record your digital
> audio as much near
> possible the 0 dB to avoid any normalization. The
> more you leave your file
> alone (no dsp) the best result you have.
>
> cheers
>
> louis
>
>
> le 10/19/05 10:26 PM, Phil Thomson �
> hellomynameisphil@gmail.com a �crit�:
>
> > Hi all,
> >
> > I should probably know this, but I have a question
> about levels in
> > digital audio. In my own work, I've always
> normalized my digital audio
> > stuff to 0 dB or similar levels, and have never
> had any problem with
> > distortion or clipping while running my levels at
> close to 0 dB, but
> > lately I've been hearing that -12 dB is the
> maximum level that you
> > should shoot for, because clipping is introduced
> at even -6 or -8 dB.
> > Is this only true of DAT or DV, or is it the case
> for digital audio
> > across the board? I've *never* heard any clipping
> in my own work (on
> > the computer), but the video folks I'm hanging
> with now claim that -12
> > dB is the new 0 dB. What's up?
> >
> > PT
> >
> > --
> > Phil Thomson, BFA, MFA
> >
>
010100000110100001101001011011000010000001010100011010000110111101101101011100
> > 110110111101101110
> > hellomynameisphil@gmail.com
> > http://www.sfu.ca/~pthomson/
>
>
>
>
>
>
>
>

                
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