======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '384'
                                          'artist'  'Jon Hopkins'
                                     'text_people'  ''
                                         'release'  'Opalescent'
                                           'title'  'Elegiac'
                                           'quals'  "['q-bass-4', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'im-beats'
                                             'bpm'  '127.0'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Opalescent'
'TBPM' (BPM (beats per minute))                     '127.0'
'TCON' (Content type, a.k.a. Genre)                 'im-beats'
'TDRC' (Recording time)                             '2004'
'TIT2' (Title/songname/content description)         'Elegiac'
'TKEY' (Initial key)                                '5B'
'TPE1' (Lead performer(s)/Soloist(s))               'Jon Hopkins'
'TRCK' (Track number/Position in set)               '1'
'TXXX:MP3GAIN_MINMAX'                               '101,208'
'TXXX:MP3GAIN_UNDO'                                 '+002,+002,N'
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.58 dB'
'TXXX:replaygain_track_peak'                        '0.686274'

========================== row from database ==========================
                                              'id'  1537235
                                            'path'  /data/Music/Other/F3/Jon Hopkins/01 - Elegiac.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  384
                                           'genre'  im-beats
                                        'filesize'  9218375
                                           'mtime'  1662800093
                                   'redo_metaread'  0
                                        'rest_str'   F3 01 im beats
                                      'tag_artist'  Jon Hopkins
                                     'tag_release'  Opalescent
                                       'tag_title'  Elegiac
                                             'bpm'  127.0
                                    'search_title'  'elegiac':1
                                   'search_artist'  'hopkins':2 'jon':1
                                  'search_release'  'opalescent':1
                                     'search_rest'  'beats':3 'f3':1 'im':2
                                    'search_combo'  'beats':7 'elegiac':1A 'f3':5 'hopkins':3B 'im':6 'jon':2B 'opalescent':4C
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  5B
                                           'quals'  ['q-bass-4', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2']
                                      'lastfmtags'  []
                                        'tag_date'  2004
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800092.9436154  (2022-09-10 10:54:52)
                             'size'  9218375