======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '222'
                                          'artist'  'Fleetwood Mac'
                                     'text_people'  ''
                                         'release'  'Greatest Hits'
                                           'title'  'Everywhere'
                                           'quals'  "['q-bass-3', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'pop,eighties,zomgeighties'
                                             'bpm'  '114.7'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Greatest Hits'
'TBPM' (BPM (beats per minute))                     '114.7'
'TCON' (Content type, a.k.a. Genre)                 'pop,eighties,zomgeighties'
'TIT2' (Title/songname/content description)         'Everywhere'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Fleetwood Mac'
'TRCK' (Track number/Position in set)               '5'
'TXXX:q-bass'                                       '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.60 dB'
'TXXX:replaygain_track_peak'                        '0.962484'

========================== row from database ==========================
                                              'id'  1538808
                                            'path'  /data/Music/Other/PrevSet/[7zomgeighties]/Fleetwood Mac - Everywhere.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  222
                                           'genre'  pop,eighties,zomgeighties
                                        'filesize'  3563737
                                           'mtime'  1662800452
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [7zomgeighties] pop,eighties,zomgeighties
                                      'tag_artist'  Fleetwood Mac
                                     'tag_release'  Greatest Hits
                                       'tag_title'  Everywhere
                                             'bpm'  114.7
                                    'search_title'  'everywhere':1
                                   'search_artist'  'fleetwood':1 'mac':2
                                  'search_release'  'greatest':1 'hits':2
                                     'search_rest'  '7zomgeighties':2,3 'eighties':5,8 'pop':4,7 'prev':10 'prevset':1 'set':11 'zomgeighties':6,9
                                    'search_combo'  '7zomgeighties':7,8 'eighties':10,13 'everywhere':1A 'fleetwood':2B 'greatest':4C 'hits':5C 'mac':3B 'pop':9,12 'prev':15 'prevset':6 'set':16 'zomgeighties':11,14
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['q-bass-3', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800451.992023  (2022-09-10 11:00:51)
                             'size'  3563737