JJZolx wrote: 
> It appears to be a bug, but it would be good to figure out why it's
> happening, so that it can be fixed. I can't tell from your description
> if only moving the files, without changing the existing tagging, was
> enough to make it correct.
> 
> In my experience, using COMPILATION=0 can cause odd things with the
> artist roles. It shouldn't, but it sometimes does.
> 
> 
> 
> No, not unless the file's size or the modified time changes. Typically,
> when you add or remove metadata, there's some unused space in the tag
> that is simply expanded or contracted to accommodate the changes. If
> you're preserving the mod time in your tagging software, then LMS won't
> think the files have changed. I run a little program that adds 2 seconds
> to the file mod times any time I do edits.

Firsdt time round I removed the comp=0 tag, changed the timestamps using
touch and rescanned with no change in outcome.

Second round I moved the files to another folder and ran a scan (comp=0
still removed).  That removed Dolly from the Album Artist list.

I reinserted the comp=0 tag, moved the folder and rescanned and Dolly
was back in the Album Artist list.

So I see two bugs:
1) incorrect behaviour of album artist listing where compilation=0 is
present and you have one (or more?) tracks with more than one artist
entry - i.e. the albumartist tag is being ignored in this situation
2) changes to tags with underlying file time and date stamps being
altered not being picked up in a rescan.  Not picking up the change may
have something to do with the drive being mounted
"user,noatime,nodiratime,nodev,errors=remount-ro  0  0".  Having said
that, a simple test shows that the timestamps are being changed:


Code:
--------------------
    $ ls -la
  total 12
  drwxrwxr-x 3 x x 4096 Jul  9 08:15 .
  drwxrwxr-x 4 x x 4096 Jul  9 08:10 ..
  drwxrwxr-x 2 x x 4096 Jul  9 06:57 Anne-Sophie Mutter - Back to the Future 
Selected 20th-Century Violin Works [Limited Edition]
  $ find . -exec touch {} \;
  $ ls -la
  total 12
  drwxrwxr-x 3 x x 4096 Jul  9 08:39 .
  drwxrwxr-x 4 x x 4096 Jul  9 08:10 ..
  drwxrwxr-x 2 x x 4096 Jul  9 08:39 Anne-Sophie Mutter - Back to the Future 
Selected 20th-Century Violin Works [Limited Edition]
  $ 
--------------------



Similarly, the files in the folder are also changed:

Code:
--------------------
    -rw-r--r-- 1 x x 67128187 Jul  9 08:39 01 - Violin Concerto in D minor, Op. 
47 l. Allegro Moderato.flac
  -rw-r--r-- 1 x x 32003059 Jul  9 08:39 02 - Violin Concerto in D minor, Op. 
47 ll. Adagio Di Molto.flac
  -rw-r--r-- 1 x x 36262608 Jul  9 08:39 03 - Violin Concerto in D minor, Op. 
47 lll. Allegro, Ma Non Tanto.flac
  -rw-r--r-- 1 x x 58130200 Jul  9 08:39 04 - Violin Concerto No. 2 
(Metamorphosen) Allegro ma non troppo - Allegro vivace.flac
  -rw-r--r-- 1 x x 14495551 Jul  9 08:39 05 - Violin Concerto No. 2 
(Metamorphosen) Allegretto.flac
  -rw-r--r-- 1 x x 19383551 Jul  9 08:39 06 - Violin Concerto No. 2 
(Metamorphosen) Molto meno mosso.flac
  -rw-r--r-- 1 x x  8776620 Jul  9 08:39 07 - Violin Concerto No. 2 
(Metamorphosen) Vivace.flac
  -rw-r--r-- 1 x x 23991392 Jul  9 08:39 08 - Violin Concerto No. 2 
(Metamorphosen) Scherzando - vivacissimo.flac
  ...
  
--------------------


So, I have to conclude that scan for changes is not correctly detecting
changes.



SqueezeWand | 'Vivere DAC MKI'
(http://vivereaudio.com/post/2013/08/16/DAC-I-is-Born!.aspx) | 'ATC
SCA2'
(http://www.atcloudspeakers.co.uk/hi-fi/electronics/source-pre-amplifiers/sca2/)
| 'ATC SCM100ASLT'
(http://www.atcloudspeakers.co.uk/hi-fi/loudspeakers/tower-series/scm100aslt/)

*'Linux finally gets a great audio tagger'
(http://www.ubuntugeek.com/linux-finally-gets-a-great-audio-tagger.html):
'puddletag' (http://puddletag.sourceforge.net/)* - now packaged in most
Linux distributions.
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