Hi Vicki
The only dumb question is the one you don't ask!
Mac OSX (and I assume a similar case holds for WinOS) recognises two date and
time stamps relating to files - Creation Date and Modification Date. Copying
the WAV files from your recorder to your computer will preserve the Creation
Date but will alter the Modification Date. If you edit the file and "Save" back
to the same disk file you should retain the original Creation Date but get an
altered Modification Date. Once you "save as" or "save" to a different file you
are effectively creating a new file and the Creation Date will reflect the date
and time this was created, so you loose the date stamp of the original file.
This is the information the HDP2 embeds (minus timecode "junk" and xml header)
as metadata:
<dict>
<key>description</key>
<string>tTAPE=091231
</string>
<key>originationDate</key>
<string>2009-12-31</string>
<key>originationTime</key>
<string>06:30:09</string>
<key>originator</key>
<string>TASCAM HD-P2</string>
<key>originatorReference</key>
<string></string>
</dict>
.
This information will survive editing providing you save using a BWF aware
application and is far better than relying on file system creation dates. I'd
recommend unless you have a really compelling reason to save to AIFF that you
should consider using WAV for archives and edited files.
cheers
Paul
On 23/04/2010, at 10:28 AM, vickipowys wrote:
> orry to throw in a really dumb question, BUT
>
> If I make a recording on a flash-card recorder then it gets
> automatically date and time stamped (always assuming that I have set
> the time-date correctly in the reccorder).
>
> When I later process the recording (let's say I remove 5 minutes of
> footsteps and preserve one minute of birdsong), then I am left with
> an AIFF file on a Mac that has lost the date and time stamp.
>
> Are you proposing that the ideal way for archiving is to then re-
> embed time, date and additional data that will be permanently tagged
> to the sound file?
>
> For the moment I'm sticking with my manual database, thanks all the
> same, and verbal announcements regarding species name, description,
> behaviour, place, weather, etc.
>
> cheers,
>
> Vicki
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