======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '253'
                                          'artist'  'Fleetwood Mac'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1'
                                           'title'  'Say You Love Me'
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-4', "
 "'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['80s', 'soft rock', 'rock', 'pop', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '53'
                                      'tracktotal'  ''
                                            'date'  '1976'
                                        'comments'  ''
                                           'genre'  'rock-cppex;set-pl-billboard'
                                             'bpm'  '128.251'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'Billboard'
'TALB' (Album/Movie/Show title)                     'Billboard Top Pop Singles of 1'
'TBPM' (BPM (beats per minute))                     '128.251'
'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex', 'set-pl-billboard']
'TDRC' (Recording time)                             '1976'
'TIT2' (Title/songname/content description)         'Say You Love Me'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Fleetwood Mac'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '53'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['80s', 'soft rock', 'rock', 'pop', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.31 dB'
'TXXX:replaygain_track_peak'                        '0.681320'

========================== row from database ==========================
                                              'id'  1289753
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1976/053 - Fleetwood Mac - Say You Love Me.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  253
                                           'genre'  rock-cppex;set-pl-billboard
                                        'filesize'  5074347
                                           'mtime'  1620737119
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1976 053 rock cppex;set pl billboard
                                      'tag_artist'  Fleetwood Mac
                                     'tag_release'  Billboard Top Pop Singles of 1
                                       'tag_title'  Say You Love Me
                                             'bpm'  128.251
                                    'search_title'  'love':3 'me':4 'say':1 'you':2
                                   'search_artist'  'fleetwood':1 'mac':2
                                  'search_release'  '1':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '1976':3 'billboard':10 'cppex':5,7 'pl':9 'rock':4 'set':6,8 'top100':2
                                    'search_combo'  '00poprockelectronic':13 '1':12C '1976':15 'billboard':7C,22 'cppex':17,19 'fleetwood':5B 'love':3A 'mac':6B 'me':4A 'of':11C 'pl':21 'pop':9C 'rock':16 'say':1A 'set':18,20 'singles':10C 'top':8C 'top100':14 'you':2A
                                    'tag_tracknum'  53
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'soft rock', 'rock', 'pop', 'classic rock']
                                        'tag_date'  1976
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620737118.696131  (2021-05-11 14:45:18)
                             'size'  5074347