[LAU] audio meters nostalgia

[Wolfgang Woehl]

Fons Adriaensen:
> I've never seen a twin VU

Wouldn't physical "twin VU's" be terribly difficult to build because 
of magnetic correlation?

> The main difference to meterbridge is that Jmeters has the
> correct ballistics for both the VU and the PPM.
>
> 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?

Wolfgang