======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '167'
                                          'artist'  'Betty Wright'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1'
                                           'title'  'Clean Up Woman'
                                           'quals'  ("['Q-OLDST-3', 'Q-LOCALNESS-1', 'Q-JZFKS-3', 'Q-HHRNBTT-2', 'Q-UNU-1', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['rhythm and blues', 'female vocalists', 'soul', 'funk', 'rnb']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '49'
                                      'tracktotal'  ''
                                            'date'  '1972'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted;set-pl-billboard'
                                             'bpm'  '90.614'
                                             '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))                     '90.614'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-unsorted', 'set-pl-billboard']
'TDRC' (Recording time)                             '1972'
'TIT2' (Title/songname/content description)         'Clean Up Woman'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Betty Wright'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '49'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rhythm and blues', 'female vocalists', 'soul', 'funk', 'rnb']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'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'                        '+0.77 dB'
'TXXX:replaygain_track_peak'                        '0.612429'

========================== row from database ==========================
                                              'id'  1335345
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1972/049 - Betty Wright - Clean Up Woman.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  167
                                           'genre'  electronic-generic or radio-unsorted;set-pl-billboard
                                        'filesize'  3348788
                                           'mtime'  1620385020
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1972 049 electronic generic or radio unsorted;set pl billboard
                                      'tag_artist'  Betty Wright
                                     'tag_release'  Billboard Top Pop Singles of 1
                                       'tag_title'  Clean Up Woman
                                             'bpm'  90.614
                                    'search_title'  'clean':1 'up':2 'woman':3
                                   'search_artist'  'betty':1 'wright':2
                                  'search_release'  '1':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '1972':3 'billboard':13 'electronic':4 'generic':5 'or':6 'pl':12 'radio':7 'set':9,11 'top100':2 'unsorted':8,10
                                    'search_combo'  '00poprockelectronic':12 '1':11C '1972':14 'betty':4B 'billboard':6C,24 'clean':1A 'electronic':15 'generic':16 'of':10C 'or':17 'pl':23 'pop':8C 'radio':18 'set':20,22 'singles':9C 'top':7C 'top100':13 'unsorted':19,21 'up':2A 'woman':3A 'wright':5B
                                    'tag_tracknum'  49
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-3', 'q-other-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rhythm and blues', 'female vocalists', 'soul', 'funk', 'rnb']
                                        'tag_date'  1972
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620385020.2386765  (2021-05-07 12:57:00)
                             'size'  3348788