======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '377'
                                          'artist'  'Supertramp'
                                     'text_people'  ''
                                         'release'  'The Very Best Of Supertramp'
                                           'title'  'From Now On'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'Q-PLAY-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', "
 "'Q-PIANO-2', 'q-chart-4', 'q-drums-3', 'q-other-3', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['rock', 'progressive rock', 'pop', '70s', 'classic rock']"
                                     'discogstags'  "['rock', 'pop rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  '15'
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'rock-cppex-progressive'
                                             'bpm'  '123.106'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Very Best Of Supertramp'
'TBPM' (BPM (beats per minute))                     '123.106'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-progressive'
'TDRC' (Recording time)                             '1990'
'TIT2' (Title/songname/content description)         'From Now On'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Supertramp'
'TRCK' (Track number/Position in set)               '12/15'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'pop rock']
'TXXX:lastfmtags'                                   ['rock', 'progressive rock', 'pop', '70s', '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'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.44 dB'
'TXXX:replaygain_track_peak'                        '0.694104'

========================== row from database ==========================
                                              'id'  1287221
                                            'path'  /data/Music/Bulk/00poprockelectronic/Supertramp/The Very Best Of Supertramp/Supertramp - From Now on - 12.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  377
                                           'genre'  rock-cppex-progressive
                                        'filesize'  6038631
                                           'mtime'  1620737809
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic on 12 rock cppex progressive
                                      'tag_artist'  Supertramp
                                     'tag_release'  The Very Best Of Supertramp
                                       'tag_title'  From Now On
                                             'bpm'  123.106
                                    'search_title'  'from':1 'now':2 'on':3
                                   'search_artist'  'supertramp':1
                                  'search_release'  'best':3 'of':4 'supertramp':5 'the':1 'very':2
                                     'search_rest'  '00poprockelectronic':1 'cppex':4 'on':2 'progressive':5 'rock':3
                                    'search_combo'  '00poprockelectronic':10 'best':7C 'cppex':13 'from':1A 'now':2A 'of':8C 'on':3A,11 'progressive':14 'rock':12 'supertramp':4B,9C 'the':5C 'very':6C
                                    'tag_tracknum'  12
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'progressive rock', 'pop', '70s', 'classic rock']
                                        'tag_date'  1990
                                     'discogstags'  ['rock', 'pop rock']

============================== file details ==============================
                                           'mtime'  1620737809.0796661  (2021-05-11 14:56:49)
                             'size'  6038631