23 Aug
2009
23 Aug
'09
2:54 p.m.
On Mon, Aug 24, 2009 at 01:38:37AM +1000, Fraser wrote:
Yes, I know that. Still same question: what's the point of
using a meter if you adjust it to the signal rather than
adjusting the signal until the meter says it's OK ?
Of course a slow meter must be calibrated to show 0 well
below full scale digital. But that should be fixed.
I added some simple code to avoid denormals in the
bandpass filter and in the 'envelope' calculation,
and that removes the problem (just adding a small
DC offset, 1e-20).
So what ? If you call it VU and it looks like one, it
should behave as a VU and have VU ballistics. This one
surely doesn't.
For example IEC61260, or the BS/EN with the same number.
It measures an average of atan ((l-r)/(l+r))), which maybe
related to phase for a sine wave with equal amplitude in
both channels, but there it ends. Panning a sine wave L to R
produces all values between 0 and 45. If it measures phase
that should be 0.
Anyway phase is not the thing to measure, correlation
is. And this is certainly not a correlation meter, just
compare it with a real one.
Ciao,
--
FA
Io lo dico sempre: l'Italia รจ troppo stretta e lunga.
What's the
point of using a meter if you adjust it to the signal ?
You are not changing the signal, you are changing the amount of headroom the VU
meter has. http://www.reference.com/browse/wiki/Headroom Anyway the
meter plugin freezes my machine if the signal is muted
or removed. Probably due to denormals.
I can't reproduce that.
A clue may help. (distro, arch, kernel, soundcard, host etc). The VU is not
a VU,
Correct since this plugin isn't in the analogue domain. the spectrum
doesn't use valid 1/3 octave filters by any standard,
please advise where this standard is. and the phase
meter doesn't indicate anything useful.
Apart from the relative phase difference between the left and right channels.