23 Aug
2009
23 Aug
'09
4:27 p.m.
On Sun, 2009-08-23 at 20:08 +0200, Ralf Mardorf wrote:
On English, for international broadcasting you need different
adjustments. But then it's important that the meter is informed about
the analogue mixer of the sound card too ;). I guess it will become
nearly impossible to fit a dBFS RMS meter to any VU meter outside the
studio in the box. An external VU meter can't be replaced by one in the
box for Linux using different sound cards.
Sure it can.
Lets say your card is aligned so that 0dbFS = +18dbu (EBU standard),
then 0Vu = +4dbu = - 14dbFS, so a software VU calibrated for 0Vu =
-14dbFs should read the same as an external Vu calibrated for +4dbu =
0Vu. If it does not then either a calibration setting is off somewhere
or one of the meters is faulty.
The key is that every stage has to have a known calibration, which is
actually fairly common with professional cards.
I agree that VU is not that useful a meter in many ways these days, but
it is arguably more useful in a production room context then a DPM as
long as there is sufficient headroom (In a production room I really
don't want to care about peak levels, and as long as my reference level
is far enough below 0dbFS I shouldn't have to.....
Regards, Dan.