Matthias Blau wrote:
Dear list,
is there any specific reason why dbtorms and friends do not take dB
values <=0 as input?
From my point of view (and that of most people I know), an object
called dbtorms should do a dB to RMS conversion, e.g. convert -20 to
0.000001 in pd and not silently output zero as it does right now.
Both pd internally and high-quality audio cards can do sensible things
with numbers this low.
Kind of reminds one of the Total Ozone Mapping Spectrometer (TOMS) bug
http://earthobservatory.nasa.gov/Features/RemoteSensingAtmospher/remote_sensing5.php
which is frequently ranked among the top 10 historical software bugs
with extreme consequences: It made NASA unaware of the antarctic hole
in the ozone layer for years simply because the analysis software
ignored ozone values below a certain threshold...
Isn't this putting it a bit too dramatically?
At least here the help file clearly states "zero dB, which should
correspond to 0.0001 in "RMS", is instead rounded down to zero" so
nothing you are unaware of really
dB isn't really a "physical" unit anyway, so I guess some approximation
with it shouldn't crash any rocket [1]... :)
That said your request also makes sense.. maybe a [dbtorms2] to keep
retro-compatibility and laziness.
Lorenzo
So please pd developers, change this or give a good reason for not
taking lessons from history.
Best whishes,
Matthias
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[1] http://en.wikipedia.org/wiki/Ariane_5_Flight_501
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