12 Apr
2008
12 Apr
'08
8:08 p.m.
On Sat, Apr 12, 2008 at 11:32:49PM +0200, Wolfgang Woehl wrote:
The VU meter is defined by ANSI, BS and IEC standards.
For the PPM there are BS and EBU standards.
The numbers quoted are those I learned long ago when I
was a student at the broadcasting and performing arts
academy in Brussels... Nostalgia indeed...
Ciao,
--
FA
Laboratorio di Acustica ed Elettroacustica
Parma, Italia
Lascia la spina, cogli la rosa.
The VU meter
measures the average of the absolute value of
the signal, 'average' meaning a second order filter that
reaches 99% in 300ms and overshoots between 1.0 and 1.5%.
It is calibrated to indicate 0dB for a sine wave at -10dB
w.r.t. digital full scale (which is +/-1 peak in this case).
Are these numbers modelled after a real device?