Audio Forensics ???

[Hi-Soft]

Anyone know if it is possible to the aproximate the age of a recording on an
audio cassette ?

I have to have some cassette tapes analysed to determine if the recordings
of some original songs were actually recorded either 4- 5 years ago, or
recorded in the last few months !

They are probably recorded on old tapes, so i can't even tell by the model
of cassette !

Any help or info would be greatly appreciated.....

--

Cheers,

O
[III\
/""III ""\
/ III \
bcanham@bigpond.net.au

[Mike Rivers]

In article <wJ03b.66511$bo1.19344@news-server.bigpond.net.au> bcanham@bigpond.net.au writes:

> I have to have some cassette tapes analysed to determine if the recordings
> of some original songs were actually recorded either 4- 5 years ago, or
> recorded in the last few months !
>
> They are probably recorded on old tapes, so i can't even tell by the model
> of cassette !

Sounds like you suspect some fakery here. You might be able to tell if
you had the machine that made the recordings. The bias would be at a
fairly stable level, but still degradation of the flux on the tape
could be affected by storage temperature, and attempts at partial
erasure in the skulduggery.




--
I'm really Mike Rivers - (mrivers@d-and-d.com)

[Hi-Soft]

yeah exactly....We needed to compare some original recording to some recent
ones to show how different they were, but now we suspect the original has
been completely re recorded to sound very similar to our recent recordings !

I guess if it's not possible to tell, it won't be admissable in courte ?

--

Cheers,

O
[III\
/""III ""\
/ III \
bcanham@bigpond.net.au

"Mike Rivers" <mrivers@d-and-d.com> wrote in message
news:znr1061992796k@trad...
>
> In article <wJ03b.66511$bo1.19344@news-server.bigpond.net.au>
bcanham@bigpond.net.au writes:
>
> > I have to have some cassette tapes analysed to determine if the
recordings
> > of some original songs were actually recorded either 4- 5 years ago, or
> > recorded in the last few months !
> >
> > They are probably recorded on old tapes, so i can't even tell by the
model
> > of cassette !
>
> Sounds like you suspect some fakery here. You might be able to tell if
> you had the machine that made the recordings. The bias would be at a
> fairly stable level, but still degradation of the flux on the tape
> could be affected by storage temperature, and attempts at partial
> erasure in the skulduggery.
>
>
>
>
> --
> I'm really Mike Rivers - (mrivers@d-and-d.com)

[Scott Dorsey]

Hi-Soft <bcanham@bigpond.net.au> wrote:
>yeah exactly....We needed to compare some original recording to some recent
>ones to show how different they were, but now we suspect the original has
>been completely re recorded to sound very similar to our recent recordings !
>
>I guess if it's not possible to tell, it won't be admissable in courte ?

If anybody has a way of doing this, Wes Dooley will know.

What is admissable in court I have no clue about, since your laws are very
different than ours. In the US, just about anything can be brought in as
expert witness testimony, no matter how outrageous and fraudulent. But the
other side can do the same thing too.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[Hi-Soft]

haha....you poor bastards over there have some histerical laws ... but don't
worry we have a fair share too !

--

Cheers,

O
[III\
/""III ""\
/ III \
bcanham@bigpond.net.au

"Scott Dorsey" <kludge@panix.com> wrote in message
news:bijio5$mct$1@panix2.panix.com...
> Hi-Soft <bcanham@bigpond.net.au> wrote:
> >yeah exactly....We needed to compare some original recording to some
recent
> >ones to show how different they were, but now we suspect the original has
> >been completely re recorded to sound very similar to our recent
recordings !
> >
> >I guess if it's not possible to tell, it won't be admissable in courte ?
>
> If anybody has a way of doing this, Wes Dooley will know.
>
> What is admissable in court I have no clue about, since your laws are very
> different than ours. In the US, just about anything can be brought in as
> expert witness testimony, no matter how outrageous and fraudulent. But
the
> other side can do the same thing too.
> --scott
>
> --
> "C'est un Nagra. C'est suisse, et tres, tres precis."

[Roger W. Norman]

Well, without the original recorder of the event, songs, whatever, available
to testify, it's not likely that anyone else is going to be able to verify
the date of the recordings through forensics testing. Just as that Alien
Autopsy testing at Kodak only turned up the fact that it was film stock of
the time, or of 20 years later when they re-ran the production line again, a
tape manufacturing expert could only attest to when that particular line of
tapes were made.

Generally, but again, here in the US, evidence is only allowed if it can be
verified as to it's authenticity as to what's recorded. The evidence can't
be allowed if there's no one to authenticate it. Part of the hearsay laws
since the defendant wouldn't be able to cross-examine the evidence.

Your best bet, if you haven't already done so, is to copyright your songs as
they stand, and if the other guys have done the same, let the court decide
if they are the same songs or not. If the other guys haven't copyrighted
their music and only have an unverifiable tape in hand, it's not likely that
they could wage a successful court challenge in any democracy.

--


Roger W. Norman
SirMusic Studio
Purchase your copy of the Fifth of RAP CD set at www.recaudiopro.net.
See how far $20 really goes.




"Hi-Soft" <bcanham@bigpond.net.au> wrote in message
news:ZMc3b.67893$bo1.44441@news-server.bigpond.net.au...
> haha....you poor bastards over there have some histerical laws ... but
don't
> worry we have a fair share too !
>
> --
>
> Cheers,
>
> O
> [III\
> /""III ""\
> / III \
> bcanham@bigpond.net.au
>
> "Scott Dorsey" <kludge@panix.com> wrote in message
> news:bijio5$mct$1@panix2.panix.com...
> > Hi-Soft <bcanham@bigpond.net.au> wrote:
> > >yeah exactly....We needed to compare some original recording to some
> recent
> > >ones to show how different they were, but now we suspect the original
has
> > >been completely re recorded to sound very similar to our recent
> recordings !
> > >
> > >I guess if it's not possible to tell, it won't be admissable in courte
?
> >
> > If anybody has a way of doing this, Wes Dooley will know.
> >
> > What is admissable in court I have no clue about, since your laws are
very
> > different than ours. In the US, just about anything can be brought in
as
> > expert witness testimony, no matter how outrageous and fraudulent. But
> the
> > other side can do the same thing too.
> > --scott
> >
> > --
> > "C'est un Nagra. C'est suisse, et tres, tres precis."
>
>