======================== unified (from filesystem) ========================
                                         'bitrate'  '197.082'
                                        'duration'  '132'
                                          'artist'  'Jean Redford'
                                     'text_people'  ''
                                         'release'  'Celtic Mouth Music'
                                           'title'  "Children's Songs in Lallans Scots"
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                                      'lastfmtags'  "['british isles']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '33'
                                      'tracktotal'  '37'
                                            'date'  '1997'
                                        'comments'  ''
                                           'genre'  'loc-eur'
                                             'bpm'  '124.4'
                                             'key'  '12A'
                                        'acoustid'  '22f898c3-6c60-4e4d-8fe5-2b5b2f2838f9'
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'TBPM' (BPM (beats per minute))                     '124.4'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur'
'TDOR' (Original release time)                      '1997'
'TDRC' (Recording time)                             '1997'
'TIT2' (Title/songname/content description)         "Children's Songs in Lallans Scots"
'TKEY' (Initial key)                                '12A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Jean Redford'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Ellipsis Arts...'
'TRCK' (Track number/Position in set)               '33/37'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Redford, Jean'
'TXXX:ASIN'                                         'B0000059U2'
'TXXX:Acoustid Id'                                  '22f898c3-6c60-4e4d-8fe5-2b5b2f2838f9'
'TXXX:CATALOGNUMBER'                                'CD4070'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
'TXXX:MusicBrainz Album Id'                         '121bdc02-f649-4092-aac0-cb5a9b8f1621'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
'TXXX:MusicBrainz Artist Id'                        '9b27f8d0-aded-44d8-b585-fd779a4061b9'
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'TXXX:Q-LOCALNESS'                                  '4'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '3'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   'british isles'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
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'TXXX:replaygain_track_gain'                        '+1.52 dB'
'TXXX:replaygain_track_peak'                        '0.568419'
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========================== row from database ==========================
                                              'id'  1509870
                                            'path'  /data/Music/Bulk/00localcharacter/VA. World 1： Trad/Celtic Mouth Music (Ellipsis Arts, 1997) [202k VBR]/33-Children_s Songs In Lallans Scots .mp3
                                         'working'  None
                                         'bitrate'  197
                                    'duration_sec'  132
                                           'genre'  loc-eur
                                        'filesize'  3268481
                                           'mtime'  1620536192
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter VA. World 1： Trad (Ellipsis Arts, 1997) [202k VBR] 33 Children_s In loc eur
                                      'tag_artist'  Jean Redford
                                     'tag_release'  Celtic Mouth Music
                                       'tag_title'  Children's Songs in Lallans Scots
                                             'bpm'  124.4
                                    'search_title'  'children':1 'childrens':3 'in':5 'lallans':6 's':2 'scots':7 'songs':4
                                   'search_artist'  'jean':1 'redford':2
                                  'search_release'  'celtic':1 'mouth':2 'music':3
                                     'search_rest'  '1':4,5,6 '1997':12,13 '202k':14,15 '33':18 'arts':10,11 'children':19 'ellipsis':8,9 'eur':23 'in':21 'loc':22 's':20 'trad':7 'va':1,2 'vbr':16,17 'world':3
                                    'search_combo'  '1':16,17,18 '1997':24,25 '202k':26,27 '33':30 'arts':22,23 'celtic':10C 'children':1A,31 'childrens':3A 'ellipsis':20,21 'eur':35 'in':5A,33 'jean':8B 'lallans':6A 'loc':34 'mouth':11C 'music':12C 'redford':9B 's':2A,32 'scots':7A 'songs':4A 'trad':19 'va':13,14 'vbr':28,29 'world':15
                                    'tag_tracknum'  33
                                      'num_images'  0
                                             'key'  12A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-4', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-3', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['british isles']
                                        'tag_date'  1997
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620536192.4062614  (2021-05-09 06:56:32)
                             'size'  3268481