A bitrate column half-exists, but is disabled in the code. I think the reason
for this is that any tracks that is variable bitrate (pretty much people use
these days, apart from CBR mp3s) is reported as "0". At least it used to be; for
some reason by oggs now always report "128 kbs" in the song-info dialog, even
though they're not.

We could probably use (8*filesize/duration) as an approximate average bitrate,
although it will be slightly too high (file-overhead isn't included in bitrate
calculation). Perhaps the column should use that approximation if bitrate=0, and
append a "*" to denote that it is an average. The song-info dialog could report
the bitrate in the form "117 (average)".

Rhythmbox already reports the bitrate (for CBR and VBR MP3s) if you view the
song's properties - why can't that information be used for the column?

The patch on bug 167659 adds a "Quality" (bitrate) column, amongst others.

*** This bug has been marked as a duplicate of 167659 ***