======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '224'
                                          'artist'  'Mary MacGregor'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1'
                                           'title'  'Torn Between Two Lovers'
                                           'quals'  ("['Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-2']")
                                      'lastfmtags'  "['female vocalists', 'pop', 'country', 'american', '70s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  ''
                                            'date'  '1977'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted;set-pl-billboard'
                                             'bpm'  '129.813'
                                             'key'  '7B'
                                        '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))                     '129.813'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-unsorted', 'set-pl-billboard']
'TDRC' (Recording time)                             '1977'
'TIT2' (Title/songname/content description)         'Torn Between Two Lovers'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Mary MacGregor'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '10'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['female vocalists', 'pop', 'country', 'american', '70s']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.70 dB'
'TXXX:replaygain_track_peak'                        '0.862055'

========================== row from database ==========================
                                              'id'  1318255
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1977/010 - Mary MacGregor - Torn Between Two Lovers.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  224
                                           'genre'  electronic-generic or radio-unsorted;set-pl-billboard
                                        'filesize'  4501285
                                           'mtime'  1620385158
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1977 010 electronic generic radio unsorted;set pl billboard
                                      'tag_artist'  Mary MacGregor
                                     'tag_release'  Billboard Top Pop Singles of 1
                                       'tag_title'  Torn Between Two Lovers
                                             'bpm'  129.813
                                    'search_title'  'between':2 'lovers':4 'torn':1 'two':3
                                   'search_artist'  'gregor':4 'mac':3 'macgregor':2 'mary':1
                                  'search_release'  '1':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '1977':3 'billboard':12 'electronic':4 'generic':5 'pl':11 'radio':6 'set':8,10 'top100':2 'unsorted':7,9
                                    'search_combo'  '00poprockelectronic':15 '1':14C '1977':17 'between':2A 'billboard':9C,26 'electronic':18 'generic':19 'gregor':8B 'lovers':4A 'mac':7B 'macgregor':6B 'mary':5B 'of':13C 'pl':25 'pop':11C 'radio':20 'set':22,24 'singles':12C 'top':10C 'top100':16 'torn':1A 'two':3A 'unsorted':21,23
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-3', 'q-other-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['female vocalists', 'pop', 'country', 'american', '70s']
                                        'tag_date'  1977
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620385158.1159463  (2021-05-07 12:59:18)
                             'size'  4501285