======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '242'
                                          'artist'  'UB40'
                                     'text_people'  ''
                                         'release'  'The Very Best Of ... 1980-2000'
                                           'title'  'Sing Our Own Song'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-3', 'Q-UNU-2', 'Q-HHRNBTT-2', 'Q-LOCALNESS-3', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['80s', 'reggae', 'ska', 'british', 'pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '20'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'loc-style-reggae or dub or ska or dancehall-pop'
                                             'bpm'  '101.819'
                                             'key'  '2B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Very Best Of ... 1980-2000'
'TBPM' (BPM (beats per minute))                     '101.819'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-reggae or dub or ska or dancehall-pop'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         'Sing Our Own Song'
'TKEY' (Initial key)                                '2B'
'TPE1' (Lead performer(s)/Soloist(s))               'UB40'
'TRCK' (Track number/Position in set)               '20'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['80s', 'reggae', 'ska', 'british', 'pop']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.29 dB'
'TXXX:replaygain_track_peak'                        '0.405571'

========================== row from database ==========================
                                              'id'  1387500
                                            'path'  /data/Music/Bulk/00localcharacter/00reggae-dub/Ub40/The Very Best Of . 1980-2000/MBZ;#UB40;#THE VERY BEST OF  1980-2000;#20;#Sing Our Own Song.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  242
                                           'genre'  loc-style-reggae or dub or ska or dancehall-pop
                                        'filesize'  5830118
                                           'mtime'  1620522585
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00reggae dub Ub40 MBZ;#UB40;#THE VERY BEST OF 2000;#20;#Sing loc style reggae or dub or ska or dancehall pop
                                      'tag_artist'  UB40
                                     'tag_release'  The Very Best Of ... 1980-2000
                                       'tag_title'  Sing Our Own Song
                                             'bpm'  101.819
                                    'search_title'  'our':2 'own':3 'sing':1 'song':4
                                   'search_artist'  'ub40':1
                                  'search_release'  '1980':5 '19802000':7 '2000':6 'best':3 'of':4 'the':1 'very':2
                                     'search_rest'  '00reggae':1 '20':14,17 '2000':13,16 'best':11 'dancehall':24 'dub':2 'loc':19 'mbz':4,7 'of':12 'or':22 'pop':25 'reggae':21 'sing':15,18 'ska':23 'style':20 'the':6,9 'ub40':3,5,8 'very':10
                                    'search_combo'  '00reggae':13 '1980':10C '19802000':12C '20':26,29 '2000':11C,25,28 'best':8C,23 'dancehall':36 'dub':14 'loc':31 'mbz':16,19 'of':9C,24 'or':34 'our':2A 'own':3A 'pop':37 'reggae':33 'sing':1A,27,30 'ska':35 'song':4A 'style':32 'the':6C,18,21 'ub40':5B,15,17,20 'very':7C,22
                                    'tag_tracknum'  20
                                      'num_images'  0
                                             'key'  2B
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-3', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'reggae', 'ska', 'british', 'pop']
                                        'tag_date'  2002
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620522585.1453254  (2021-05-09 03:09:45)
                             'size'  5830118