======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '344'
                                          'artist'  'Barry Manilow'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1'
                                           'title'  'Copacabana'
                                           'quals'  ("['Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-OLDST-3', "
 "'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['80s', 'soft rock', 'oldies', 'pop', 'easy listening']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '74'
                                      'tracktotal'  ''
                                            'date'  '1978'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted;set-pl-billboard'
                                             'bpm'  '117.195'
                                             'key'  '6A'
                                        '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))                     '117.195'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-unsorted', 'set-pl-billboard']
'TDRC' (Recording time)                             '1978'
'TIT2' (Title/songname/content description)         'Copacabana'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Barry Manilow'
'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'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['80s', 'soft rock', 'oldies', 'pop', 'easy listening']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'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'                        '+1.45 dB'
'TXXX:replaygain_track_peak'                        '0.600427'

========================== row from database ==========================
                                              'id'  1339604
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1978/074 - Barry Manilow - Copacabana.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  344
                                           'genre'  electronic-generic or radio-unsorted;set-pl-billboard
                                        'filesize'  6899181
                                           'mtime'  1620385194
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1978 074 electronic generic or radio unsorted;set pl billboard
                                      'tag_artist'  Barry Manilow
                                     'tag_release'  Billboard Top Pop Singles of 1
                                       'tag_title'  Copacabana
                                             'bpm'  117.195
                                    'search_title'  'copacabana':1
                                   'search_artist'  'barry':1 'manilow':2
                                  'search_release'  '1':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '1978':3 'billboard':13 'electronic':4 'generic':5 'or':6 'pl':12 'radio':7 'set':9,11 'top100':2 'unsorted':8,10
                                    'search_combo'  '00poprockelectronic':10 '1':9C '1978':12 'barry':2B 'billboard':4C,22 'copacabana':1A 'electronic':13 'generic':14 'manilow':3B 'of':8C 'or':15 'pl':21 'pop':6C 'radio':16 'set':18,20 'singles':7C 'top':5C 'top100':11 'unsorted':17,19
                                    'tag_tracknum'  74
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-3', 'q-other-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'soft rock', 'oldies', 'pop', 'easy listening']
                                        'tag_date'  1978
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620385194.1801789  (2021-05-07 12:59:54)
                             'size'  6899181