At 10:38 AM -0700 8/19/10, James Shatto wrote:
>
>Yes the sample rate remains the same. Yes the file size probably
>remains the same. And yes the duration of the recording stays the
>same. But I find it hard to believe that a twice edited digital
>file (L/R -> M/S -> L/R) is a bit for bit exact copy of the
>original(even if you exclude the headers from the comparison). Not
>that any differences are audible to most people. Or reproduce-able
>by a lot of cheap audio equipment.
Hi James--
The file is restored _exactly_ the same (at unity settings). I'd
assume this would be the case but with earlier MS plug-ins I tried,
the files did not come out identical. Perhaps Tom Erbe's plug-in is
simpler/cleaner.
This may be good news to folks who were concerned that they lost
quality/flexibility by decoding the Mid and Side channels as the
recorded them. I use M-S processing almost routinely these days even
on non-MS recordings.
>
>Of course the sample count is the same, you're saving out to a file
>of the same sample rate, same number of channels, and same duration.
>Independent of actual content. Why would the count of bits change?
>But is the CONTENT of the bits an EXACT match to the original after
>edits?
There are no edits, just two steps of processing that do and undoing
the "decoding."
I encourage you to do some tests to further explore what your ears
are sensing and need to make physical so others can hear it too.
Note, however-- it does take a while to learn how to make reliable
comparison tests. I have to redo them all the time. Rob D.
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