======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '214'
                                          'artist'  'Sister Sledge'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1'
                                           'title'  'We Are Family'
                                           'quals'  ("['Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-JZFKS-3', 'Q-UNU-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-2']")
                                      'lastfmtags'  "['70s', 'female vocalists', 'soul', 'funk', 'disco']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '53'
                                      'tracktotal'  ''
                                            'date'  '1979'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted'
                                             'bpm'  '118.706'
                                             '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))                     '118.706'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-unsorted'
'TDRC' (Recording time)                             '1979'
'TIT2' (Title/songname/content description)         'We Are Family'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Sister Sledge'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '53'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['70s', 'female vocalists', 'soul', 'funk', 'disco']
'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'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.20 dB'
'TXXX:replaygain_track_peak'                        '0.663951'

========================== row from database ==========================
                                              'id'  1325856
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1979/053 - Sister Sledge - We Are Family.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  214
                                           'genre'  electronic-generic or radio-unsorted
                                        'filesize'  4302302
                                           'mtime'  1620567835
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1979 053 electronic generic or radio unsorted
                                      'tag_artist'  Sister Sledge
                                     'tag_release'  Billboard Top Pop Singles of 1
                                       'tag_title'  We Are Family
                                             'bpm'  118.706
                                    'search_title'  'are':2 'family':3 'we':1
                                   'search_artist'  'sister':1 'sledge':2
                                  'search_release'  '1':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '1979':3 'electronic':4 'generic':5 'or':6 'radio':7 'top100':2 'unsorted':8
                                    'search_combo'  '00poprockelectronic':12 '1':11C '1979':14 'are':2A 'billboard':6C 'electronic':15 'family':3A 'generic':16 'of':10C 'or':17 'pop':8C 'radio':18 'singles':9C 'sister':4B 'sledge':5B 'top':7C 'top100':13 'unsorted':19 'we':1A
                                    'tag_tracknum'  53
                                      'num_images'  0
                                             'key'  6A
                                           '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-3', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-3', 'q-other-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['70s', 'female vocalists', 'soul', 'funk', 'disco']
                                        'tag_date'  1979
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620567834.6459904  (2021-05-09 15:43:54)
                             'size'  4302302