======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '217'
                                          'artist'  'Madonna'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Lucky Star'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['dance', '80s', 'female vocalists', 'pop', 'electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'electronic-unsorted;set-pl-billboard'
                                             'bpm'  '118.2'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '118.2'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-unsorted', 'set-pl-billboard']
'TDRC' (Recording time)                             '1990'
'TIT2' (Title/songname/content description)         'Lucky Star'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Madonna'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['dance', '80s', 'female vocalists', 'pop', 'electronic']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.69 dB'
'TXXX:replaygain_track_peak'                        '0.502493'

========================== row from database ==========================
                                              'id'  1292675
                                            'path'  /data/Music/Bulk/00poprockelectronic/Madonna/[1990] The Immaculate Collection/Madonna - Lucky Star - 02.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  217
                                           'genre'  electronic-unsorted;set-pl-billboard
                                        'filesize'  6970278
                                           'mtime'  1621696362
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic [1990] The Immaculate Collection 02 electronic unsorted;set pl billboard
                                      'tag_artist'  Madonna
                                     'tag_release'  None
                                       'tag_title'  Lucky Star
                                             'bpm'  118.2
                                    'search_title'  'lucky':1 'star':2
                                   'search_artist'  'madonna':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 '1990':2,3 'billboard':13 'collection':6 'electronic':7 'immaculate':5 'pl':12 'set':9,11 'the':4 'unsorted':8,10
                                    'search_combo'  '00poprockelectronic':4 '1990':5,6 'billboard':16 'collection':9 'electronic':10 'immaculate':8 'lucky':1A 'madonna':3B 'pl':15 'set':12,14 'star':2A 'the':7 'unsorted':11,13
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['dance', '80s', 'female vocalists', 'pop', 'electronic']
                                        'tag_date'  1990
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621696362.473295  (2021-05-22 17:12:42)
                             'size'  6970278