10 May
2011
10 May
'11
3:36 p.m.
On Tue, May 10, 2011 at 01:28:04PM +0000, Fons Adriaensen wrote :
On Tue, May 10, 2011 at 03:04:22PM +0200, Aurelien
wrote:
.
Yeah, for sure.
Then, I would have one question: why can I come
to different results for
several exports of the same session?
I mean, I already had cases in which my master finally end up to +1.0
dB, and the export after to -0.1dB (without changing anything), and so on.
I'm not speaking of big differences, but enough to make it hard to
optimize my dynamic before mastering.
I really thought that it was linked to realtime processing, but if not,
I'd be interested in understanding what is behind all of this.
If you export to an integer file format anything above 0dB will
be clipped.
OTOH, if the export includes resampling then the peaks in the
exported file will be higher than those at the output of the
master strip. The difference will be small in most cases, but
in theory it is unbounded. Better keep a dB or so of headroom.
For the cases I spoke about, I didn't.
But, by the way, I was speaking about the master vu-meter, which can be
observed during the export, and which is -for me- the point to which I
pay attention when exporting. This master can give a range of values for
max peak different for several exports of the very same session.
I've to say I work in studio, and use a lot of LADSPA/LV2, and work with
a 75-80% DSP load. Don't know if that influe, but...
Ciao,
--
FA
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Aurélien