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Re: Composite detection

Subject: Re: Composite detection
From: "Michael Dalton" mdaltonarielle
Date: Mon Apr 23, 2012 4:52 am ((PDT))
Thanks for the info Luis.
=A0
Your thoughts are in line with my thinking. I was considering that most "fa=
ke" clips would likely have some tell-tale signs such as has been mention i=
n other messages. Spectral shifts, differences in background, and apparent =
sharp breaks in waveforms. I think joining waveforms might be a problem in =
that most forgers probably would not know or care about zero-point crossing=
 and things like that. On the other hand knowledgeable cheats could escape =
detection ....
=A0
About Amazona Aestiva ... there is a problem in life ...=A0that is the diff=
iculty people have understanding bird speech that is not a hackneyed phrase=
. Consequently, what sounds like "walla" to many people, might, in fact, be=
 a statement made by the bird. I have considerable experience listening to =
bird speech; sometimes owners send me clips of what they call "mumbles." Wh=
en I listen to their bird, I often decode statements made by the bird, whic=
h I transcribe and return to the owner. Most of the time keepers are amazed=
, and upon receiving word, they say, "Oh, yes ... I hear the words now. You=
 are right, but I don't understand why I missed it before." They will also =
confirm things like names that I hear are correct such as towns I do not kn=
ow or proper names of their friends or other birds. This is a lot more comp=
licated than most listeners believe.
=A0
Luis, if you have a clip featuring "walla," I'd like to hear it. Of course =
if it is in a language other than English, my effectiveness is greatly redu=
ced, but I still might perceive something of interest.
=A0
Mike
Florida
www.ParrotSpeech.com

=A0
=A0
Re: Composite detection
Posted by: "Luis do Carmo"  lecarmo
Sun Apr 22, 2012 2:38 pm (PDT)


If one edits excerpts from the same sample or from different takes of
sounds recorded at the same environment and using the same gear, it'll be v=
ery
hard to detect the editing if it's skillfully done. That's what sound edito=
rs
do all the time while editing and designing dialogue, ambient sounds and sf=
x
for movies.
=C2
Way off topic:
=C2
I've known an Amazona Aestiva which
used to emulate something that resembled what is called 'walla' among film
sound people. It sounded similar to a chat between a couple people, rather =
than
a crowd chattering though. I referred to it as walla as the words sounded q=
uite
unintelligible, resembling a conversation taking place at a distance. The i=
ntonation
and melodic nuances were so alike the 'real' thing that I was deceived the
first time I heard the bird performing his 'act'.
=C2
Luis









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