======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '188'
                                          'artist'  'Creedence Clearwater Revival'
                                     'text_people'  ''
                                         'release'  'Chronicle'
                                           'title'  'Proud Mary'
                                           'quals'  ("['Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-4', "
 "'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['southern rock', 'rock', 'folk', '60s', 'classic rock']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '1993'
                                        'comments'  ''
                                           'genre'  'rock-unsorted'
                                             'bpm'  '120.113'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Chronicle'
'TBPM' (BPM (beats per minute))                     '120.113'
'TCON' (Content type, a.k.a. Genre)                 'rock-unsorted'
'TDOR' (Original release time)                      '1993'
'TDRC' (Recording time)                             '1993'
'TIT2' (Title/songname/content description)         'Proud Mary'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Creedence Clearwater Revival'
'TRCK' (Track number/Position in set)               '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['southern rock', 'rock', 'folk', '60s', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.03 dB'
'TXXX:replaygain_track_peak'                        '0.662489'

========================== row from database ==========================
                                              'id'  1333403
                                            'path'  /data/Music/Bulk/00poprockelectronic/Creedence Clearwater Revival/Creedence Clearwater Revival__Chronicle__cifs4eb8.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  188
                                           'genre'  rock-unsorted
                                        'filesize'  3020589
                                           'mtime'  1620389520
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Revival__Chronicle__cifs4eb8 rock unsorted
                                      'tag_artist'  Creedence Clearwater Revival
                                     'tag_release'  Chronicle
                                       'tag_title'  Proud Mary
                                             'bpm'  120.113
                                    'search_title'  'mary':2 'proud':1
                                   'search_artist'  'clearwater':2 'creedence':1 'revival':3
                                  'search_release'  'chronicle':1
                                     'search_rest'  '00poprockelectronic':1 'chronicle':3 'cifs4eb8':4 'revival':2 'rock':5 'unsorted':6
                                    'search_combo'  '00poprockelectronic':7 'chronicle':6C,9 'cifs4eb8':10 'clearwater':4B 'creedence':3B 'mary':2A 'proud':1A 'revival':5B,8 'rock':11 'unsorted':12
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['southern rock', 'rock', 'folk', '60s', 'classic rock']
                                        'tag_date'  1993
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620389520.1088257  (2021-05-07 14:12:00)
                             'size'  3020589