======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '209'
                                          'artist'  'Bee Gees'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1'
                                           'title'  'Night Fever'
                                           'quals'  ("['Q-HAP-4', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-1', 'q-play-3', "
 "'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['classic rock', '70s', 'oldies', 'pop', 'disco']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '1978'
                                        'comments'  ''
                                           'genre'  'electronic-we-disco or italo'
                                             'bpm'  '109.586'
                                             'key'  '1B'
                                        '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))                     '109.586'
'TCON' (Content type, a.k.a. Genre)                 'electronic-we-disco or italo'
'TDRC' (Recording time)                             '1978'
'TIT2' (Title/songname/content description)         'Night Fever'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'Bee Gees'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Q-HAP'                                        '4'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['classic rock', '70s', 'oldies', 'pop', 'disco']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.79 dB'
'TXXX:replaygain_track_peak'                        '0.679697'

========================== row from database ==========================
                                              'id'  1291702
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1978/002 - Bee Gees - Night Fever.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  209
                                           'genre'  electronic-we-disco or italo
                                        'filesize'  4195785
                                           'mtime'  1620537369
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1978 002 electronic we disco or italo
                                      'tag_artist'  Bee Gees
                                     'tag_release'  Billboard Top Pop Singles of 1
                                       'tag_title'  Night Fever
                                             'bpm'  109.586
                                    'search_title'  'fever':2 'night':1
                                   'search_artist'  'bee':1 'gees':2
                                  'search_release'  '1':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '1978':3 'disco':6 'electronic':4 'italo':8 'or':7 'top100':2 'we':5
                                    'search_combo'  '00poprockelectronic':11 '1':10C '1978':13 'bee':3B 'billboard':5C 'disco':16 'electronic':14 'fever':2A 'gees':4B 'italo':18 'night':1A 'of':9C 'or':17 'pop':7C 'singles':8C 'top':6C 'top100':12 'we':15
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-2', 'q-other-2', 'Q-HAP-4', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['classic rock', '70s', 'oldies', 'pop', 'disco']
                                        'tag_date'  1978
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620537369.3794463  (2021-05-09 07:16:09)
                             'size'  4195785