craig duncan wrote:
> However, there have been a few times (and this seems to somehow be
> dependent on the specific mp3 file) when cutting out any part of the
> beginning of the file causes any subsequent portion to sound odd (some
> sort of fairly constant/periodic chirpy/warbly/glitchy type artifact)
> when played back.
> 

It appears that a cut without any consideration to frame 
boundaries or bit reservoir may be confusing the MPEG audio
player.

There are tools available to chop at frame boundaries.  However,
I am unsure whether tools exist that are sophisticated enough to
nicely patch up the bit reservoir after cutting across any 
arbitrary frame boundary.  Crudely cutting at frame boundaries
without handling the reservoir well may leave a glitch, although 
cutting at any byte apparently may yield worse results.

(The bit reservoir can be disabled when encoding, but at a size
penalty.  The resulting audio stream can be chopped or patched
together at any frame boundary by a simple utility.)

Kind regards,

- John
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