Fwd: Reading/writing the "grouping" tag?

Ibrahim Sha'ath ibrahimshaath at gmail.com
Tue Jul 12 18:57:48 CEST 2011

After further poking around, I realised that TagLibSharp had implemented the
grouping tag in their basic API so I altered my local copy of the 1.7 source
to do much the same.

It's not exactly robust yet (though it works for my purposes) but I could
put in some more effort; is this the sort of change that the dev team are
interested in having contributed to the source, or is the basic API intended
to stay more or less static?

As an aside; I realised another likely reason that Grouping is better
supported than Initial Key: iTunes gives access to it.


---------- Forwarded message ----------
From: Ibrahim Sha'ath <ibrahimshaath at gmail.com>
Date: 11 July 2011 11:18
Subject: Reading/writing the "grouping" tag?
To: taglib-devel at kde.org

Hi all,

I'm trying to write the musical key of a track into its "grouping" iTunes
tag (it has wider support in the DJing software world than ID3's TKEY,
presumably due to the TKEY 3 char maximum). I think this is written to TPE2
in ID3 tagged files.

I see that these tags aren't covered by the simple API and I'm having some
difficulty tracking down information on how to get to them, or create them
if not present.

The audio files I'm primarily interested in are MP3s and MP4s, though it
would be ideal to have support as wide as possible. I'm working with TagLib
1.7 in Qt 4.7.4.

I'd be obliged if anyone could point me to some documentation I might have
missed in the last couple of days of Googling!

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