TL : DR
I'm looking for a way to manipulate (strip, re-write) the tags in an MP3
file from the command line under pCP.

Explanation
I've been developing a shell script that takes an LMS playlist and
exports the tracks as individual MP3 files for use in the car.  90% of
my library is in the form of 'full album' FLAC files with separate CUE
files, or individual FLAC tracks, so writing new MP3 files with my own
tags is straightforward (sox -> lame).

The other 10% is made up of files that I only have in OGG, M4A or MP3. 
My script has an option to either copy these over unchanged or to
transcode them to MP3.  For transcoding I'm using sox -> lame for OGG
and faad -> lame for M4A, but there's no point in transcoding MP3 to
MP3, so these are always copied over unchanged.

In all the cases where I use lame to create MP3 files I'm writing a
consistent set of tags: Title, Artist, Album and a Comment (to store the
'provenance' of the file).  But in the cases where an MP3 file is copied
over unchanged, it may have a variety of tags included.  So for the sake
of consistency I'm interested in stripping the existing tags and writing
my own new tags.

If I could use lame to write a new MP3 file without transcoding that
would be a good option, but I don't think such an option exists.  So I
think a command line tagger is what I need, and in particular, one that
is available under pCP.

Does such a tool exist?  As a supplementary requirement, I'm hoping that
any such tool will also allow me to read the Artist and Album tags from
the original file before stripping them out.


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