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dictionaries</title></head><body>
<div>Downsampling to MP3 from wav won't change the timecodes,
providing that the MP3 codec (the algorithm used to downsample) uses a
linear and not random encoding. Its specifications should say that it
produces a linear MP3 file.</div>
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<div>Copying digital files always results in the copy and the original
being identical, that is one of the advantages of recording digitally.
And so a master (archival and citable) audio file is the same as its
copies, and they can be downsampled and transcribed and the transcript
will also relate to the master copy. Making edited copies can lead to
problems if you then invest effort into timecoding transcripts to
files that are not archival and citable.</div>
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<div>I had exactly this problem with my own tapes, and still have a
number of files where the citable version has different timecodes to
the version I have been working with. It will take a little effort to
realign my current transcripts to the archival version.</div>
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<div>Nick Thieberger</div>
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<div>At 1:35 PM +1000 13/8/04, Pascale Jacq wrote:</div>
<blockquote type="cite" cite><b>[....]</b></blockquote>
<blockquote type="cite" cite><br>
<b>Final Questions:<br>
</b>A further concern which emerged when I thought about downsampling
to MP3 was:<i> Would the time coding change from the original WAV
format</i>? The aim of archiving linguistic data is to make it
consistent, durable, catalogued and thus easily accessible (always
back to the original source) in the future by those to whom the
speakers allow data access.<br>
I've already had the experience of a DAT tape 'drop out' of 23 seconds
in the digitisation process. Luckily the Master copy kept at AIATSIS
had these 23 seconds of material and they could make a 'red book' copy
for our use. However, I noticed that the time coding of the first
Master CD we had was now one second out from the 'red book' copy (in
addition to the 23 seconds) and thus I wonder if any copy made from
the original Master would not share the same time coding?<br>
<br>
This is a serious issue to consider if we are to use hyperlinks to
audio recordings, and I'd appreciate any advice, comments or similar
experiences you may have.</blockquote>
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