"Jim Lesurf" replied to:
Can anyone give me a lead for this;

Nor do you say why what you need could not be done by watermarking the
audio externally to the digital recording process. e.g. by low level
ENF.

Sorry, it does not exist yet and the options would be all mine which is
why I have not specified. Due to the amount there would be, mp3 on hard
disk would be most practical.

I suspect you will find that forensic workers would be suspect of lossy
formats like mp3 as they do not represent a full record of the source.
However I can't say more as I don't know enough about the specifics.

They may also want the orginal HD to examine, not just files copied from.
This lets them check the context actually on the disc itself to see if
there are any signs of tampering external to the file payload.
snip

Scrap the mp3 idea, found this baby and the manufacturer is about 5 miles
from the company who wants the secure recording system.
http://www.cedaraudio.com/products/c...cambridge.html

Also rather than constant recording to mp3 I want to get an auto trigger
system on this so the uncompressed recording kicks off when a signal comes
down the line.

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