======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '124'
                                          'artist'  'Patsy Cline'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  "Back in Baby's Arms"
                                           'quals'  ("['Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'female vocalists', '60s', 'oldies', 'classic country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1965'
                                        'comments'  ''
                                           'genre'  'soundtrack-video'
                                             'bpm'  '102.540'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '102.540'
'TCON' (Content type, a.k.a. Genre)                 'soundtrack-video'
'TDRC' (Recording time)                             '1965'
'TIT2' (Title/songname/content description)         "Back in Baby's Arms"
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Patsy Cline'
'TSOP' (Performer sort order)                       'Cline, Patsy'
'TXXX:Artists'                                      'Patsy Cline'
'TXXX:MP3GAIN_MINMAX'                               '139,197'
'TXXX:MP3GAIN_UNDO'                                 '+003,+003,N'
'TXXX:MusicBrainz Artist Id'                        'ad82dd72-0df3-4a09-8d7a-1af9c9e80522'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['country', 'female vocalists', '60s', 'oldies', 'classic country']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.22 dB'
'TXXX:replaygain_track_peak'                        '0.702091'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'1b2bbd8a-9149-45ef-8e10-f13eeceef578')

========================== row from database ==========================
                                              'id'  1506452
                                            'path'  /data/Music/Bulk/0soundtrack/Natural Born Killers/11 patsy cline - back in baby_s arms.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  124
                                           'genre'  soundtrack-video
                                        'filesize'  1991125
                                           'mtime'  1620333746
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack Natural Born Killers 11 patsy cline back baby_s arms soundtrack video
                                      'tag_artist'  Patsy Cline
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  Back in Baby's Arms
                                             'bpm'  102.54
                                    'search_title'  'arms':6 'baby':3 'babys':5 'back':1 'in':2 's':4
                                   'search_artist'  'cline':2 'patsy':1
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '0soundtrack':1 'arms':10 'baby':8 'back':7 'born':3 'cline':6 'killers':4 'natural':2 'patsy':5 's':9 'soundtrack':11 'video':12
                                    'search_combo'  '0soundtrack':14 'album':10C 'arms':6A,23 'baby':3A,21 'babys':5A 'back':1A,20 'born':16 'cline':8B,19 'in':2A 'killers':17 'natural':15 'non':9C 'nonalbum':11C 'patsy':7B,18 's':4A,22 'soundtrack':24 'tracks':12C,13C 'video':25
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['country', 'female vocalists', '60s', 'oldies', 'classic country']
                                        'tag_date'  1965
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620333745.6596868  (2021-05-06 22:42:25)
                             'size'  1991125