On Sun, Apr 13, 2008 at 10:04:51PM +0200, Florian
Schmidt wrote:
On Saturday 12 April 2008, Fons Adriaensen
wrote:
The PPM is a pseudo-peak meter. It will indicate
80% of
the steady-state value for a 10ms burst, and fall by 24db
in 2.8s. Each scale division (1..7) represents 4dB. It is
calibrated to indicate '7' (+12 dB on the EBU scale) for
0dB FS.
Excuse my ignorance, but what's a steady-state value?
The value it would show for a continuous signal of constant
amplitude. So for a 10 millisecs burst the meter will
indicate 2 dB below the true amplitude. This defines the
rise time.