======================== unified (from filesystem) ========================
                                         'bitrate'  '228.007'
                                        'duration'  '147'
                                          'artist'  'The Futureheads'
                                     'text_people'  ''
                                         'release'  'The Futureheads'
                                           'title'  'A to B'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
 "'Q-JZFKS-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['indie', 'alternative', 'british', 'indie rock', 'rock']"
                                     'discogstags'  "['rock', 'alternative rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-indie-unsorted'
                                             'bpm'  '84.916'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Futureheads'
'TBPM' (BPM (beats per minute))                     '84.916'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-indie-unsorted'
'TDRC' (Recording time)                             '2004'
'TIT2' (Title/songname/content description)         'A to B'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Futureheads'
'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:discogstags'                                  ['rock', 'alternative rock']
'TXXX:lastfmtags'                                   ['indie', 'alternative', 'british', 'indie rock', 'rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-1.40 dB'
'TXXX:replaygain_track_peak'                        '0.381233'

========================== row from database ==========================
                                              'id'  1269660
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/The Futureheads/the futureheads/03-the_futureheads-a_to_b-ssr.mp3
                                         'working'  None
                                         'bitrate'  228
                                    'duration_sec'  147
                                           'genre'  ifs-songwriter-indie-unsorted
                                        'filesize'  4208459
                                           'mtime'  1622759909
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos the futureheads 03 the_futureheads a_to_b ssr ifs songwriter indie unsorted
                                      'tag_artist'  The Futureheads
                                     'tag_release'  The Futureheads
                                       'tag_title'  A to B
                                             'bpm'  84.916
                                    'search_title'  'a':1 'b':3 'to':2
                                   'search_artist'  'futureheads':2 'the':1
                                  'search_release'  'futureheads':2 'the':1
                                     'search_rest'  '00singer':1 'a':8 'b':10 'eos':3 'futureheads':5,7 'ifs':12 'indie':13 'songwriter':2 'ssr':11 'the':4,6 'to':9 'unsorted':14
                                    'search_combo'  '00singer':8 'a':1A,15 'b':3A,17 'eos':10 'futureheads':5B,7C,12,14 'ifs':19 'indie':20 'songwriter':9 'ssr':18 'the':4B,6C,11,13 'to':2A,16 'unsorted':21
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'alternative', 'british', 'indie rock', 'rock']
                                        'tag_date'  2004
                                     'discogstags'  ['rock', 'alternative rock']

============================== file details ==============================
                                           'mtime'  1622759909.17148  (2021-06-04 00:38:29)
                             'size'  4208459