======================== unified (from filesystem) ========================
                                         'bitrate'  '159.728'
                                        'duration'  '224'
                                          'artist'  'Three Dog Night'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1972'
                                           'title'  'Never Been to Spain'
                                           'quals'  ("['Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-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-3', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['oldies', 'southern rock', '70s', 'rock', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '74'
                                      'tracktotal'  ''
                                            'date'  '1972'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted;rock-cppex;set-pl-billboard'
                                             'bpm'  '88.982'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'Billboard'
'TALB' (Album/Movie/Show title)                     'Billboard Top Pop Singles of 1972'
'TBPM' (BPM (beats per minute))                     '88.982'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-unsorted', 'rock-cppex', 'set-pl-billboard']
'TDRC' (Recording time)                             '1972'
'TIT2' (Title/songname/content description)         'Never Been to Spain'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Three Dog Night'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '74'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['oldies', 'southern rock', '70s', 'rock', 'classic rock']
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.27 dB'
'TXXX:replaygain_track_peak'                        '0.579645'

========================== row from database ==========================
                                              'id'  1284402
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1972/074 - Three Dog Night - Never Been to Spain.mp3
                                         'working'  None
                                         'bitrate'  159
                                    'duration_sec'  224
                                           'genre'  electronic-generic or radio-unsorted;rock-cppex;set-pl-billboard
                                        'filesize'  4488633
                                           'mtime'  1620737083
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 074 electronic generic or radio unsorted;rock cppex;set pl billboard
                                      'tag_artist'  Three Dog Night
                                     'tag_release'  Billboard Top Pop Singles of 1972
                                       'tag_title'  Never Been to Spain
                                             'bpm'  88.982
                                    'search_title'  'been':2 'never':1 'spain':4 'to':3
                                   'search_artist'  'dog':2 'night':3 'three':1
                                  'search_release'  '1972':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 'billboard':16 'cppex':11,13 'electronic':3 'generic':4 'or':5 'pl':15 'radio':6 'rock':8,10 'set':12,14 'top100':2 'unsorted':7,9
                                    'search_combo'  '00poprockelectronic':14 '1972':13C 'been':2A 'billboard':8C,29 'cppex':24,26 'dog':6B 'electronic':16 'generic':17 'never':1A 'night':7B 'of':12C 'or':18 'pl':28 'pop':10C 'radio':19 'rock':21,23 'set':25,27 'singles':11C 'spain':4A 'three':5B 'to':3A 'top':9C 'top100':15 'unsorted':20,22
                                    'tag_tracknum'  74
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['oldies', 'southern rock', '70s', 'rock', 'classic rock']
                                        'tag_date'  1972
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620737083.2502203  (2021-05-11 14:44:43)
                             'size'  4488633