======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '307'
                                          'artist'  'Supertramp'
                                     'text_people'  ''
                                         'release'  'The Very Best Of Supertramp'
                                           'title'  'Ain4t Nobody But Me'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['rock', 'progressive rock', 'pop', '70s', 'classic rock']"
                                     'discogstags'  "['rock', 'pop rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  '15'
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'rock-cppex-progressive'
                                             'bpm'  '134.735'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Very Best Of Supertramp'
'TBPM' (BPM (beats per minute))                     '134.735'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-progressive'
'TDRC' (Recording time)                             '1990'
'TIT2' (Title/songname/content description)         'Ain4t Nobody But Me'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Supertramp'
'TRCK' (Track number/Position in set)               '10/15'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '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'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.79 dB'
'TXXX:replaygain_track_peak'                        '0.684623'

========================== row from database ==========================
                                              'id'  1501472
                                            'path'  /data/Music/Bulk/00poprockelectronic/Supertramp/The Very Best Of Supertramp/Supertramp - Ain_t Nobody But Me - 10.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  307
                                           'genre'  rock-cppex-progressive
                                        'filesize'  4921426
                                           'mtime'  1620737809
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Ain_t 10 rock cppex progressive
                                      'tag_artist'  Supertramp
                                     'tag_release'  The Very Best Of Supertramp
                                       'tag_title'  Ain4t Nobody But Me
                                             'bpm'  134.735
                                    'search_title'  'ain4t':1 'but':3 'me':4 'nobody':2
                                   'search_artist'  'supertramp':1
                                  'search_release'  'best':3 'of':4 'supertramp':5 'the':1 'very':2
                                     'search_rest'  '00poprockelectronic':1 'ain':2 'cppex':5 'progressive':6 'rock':4 't':3
                                    'search_combo'  '00poprockelectronic':11 'ain':12 'ain4t':1A 'best':8C 'but':3A 'cppex':15 'me':4A 'nobody':2A 'of':9C 'progressive':16 'rock':14 'supertramp':5B,10C 't':13 'the':6C 'very':7C
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'progressive rock', 'pop', '70s', 'classic rock']
                                        'tag_date'  1990
                                     'discogstags'  ['rock', 'pop rock']

============================== file details ==============================
                                           'mtime'  1620737809.0440009  (2021-05-11 14:56:49)
                             'size'  4921426