======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '191'
                                          'artist'  'Fleetwood Mac'
                                     'text_people'  ''
                                         'release'  'Greatest Hits'
                                           'title'  "Don't Stop"
                                           'quals'  ("['Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', "
 "'Q-PLAY-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-chart-2', "
 "'q-drums-4', 'q-other-2', 'q-vocals-3', 'q-mixbeat-2', 'Q-PIANO-2']")
                                      'lastfmtags'  "['80s', 'soft rock', 'rock', 'pop', 'classic rock']"
                                     'discogstags'  "['rock', 'pop rock', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  '16'
                                            'date'  '1977'
                                        'comments'  ''
                                           'genre'  'rock-unsorted;set-pl-billboard'
                                             'bpm'  '118.915'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM::eng'                                         'Cleaned by TuneUp!'
'COMM:ID3v1 Comment:XXX'                            'Cleaned by TuneUp!'
'COMM:iTunNORM:eng'                                 (' 00000318 000003A6 00001AFB 00001A8B 00025C2C 00025C2C 00006B0A 0000712F '
 '0000BA1F 0000BA1F')
'TALB' (Album/Movie/Show title)                     'Greatest Hits'
'TBPM' (BPM (beats per minute))                     '118.915'
'TCON' (Content type, a.k.a. Genre)                 ['rock-unsorted', 'set-pl-billboard']
'TDRC' (Recording time)                             '1977'
'TIT2' (Title/songname/content description)         "Don't Stop"
'TKEY' (Initial key)                                '12B'
'TLEN' (Length)                                     '191895'
'TPE1' (Lead performer(s)/Soloist(s))               'Fleetwood Mac'
'TPE2' (Band/orchestra/accompaniment)               'Fleetwood Mac'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '2/16'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'pop rock', 'classic rock']
'TXXX:lastfmtags'                                   ['80s', 'soft rock', 'rock', 'pop', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.18 dB'
'TXXX:replaygain_track_peak'                        '0.743561'

========================== row from database ==========================
                                              'id'  1497088
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/02 don_t stop(2).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  191
                                           'genre'  rock-unsorted;set-pl-billboard
                                        'filesize'  7702354
                                           'mtime'  1620392245
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] 02 don_t stop(2) rock unsorted;set pl billboard
                                      'tag_artist'  Fleetwood Mac
                                     'tag_release'  Greatest Hits
                                       'tag_title'  Don't Stop
                                             'bpm'  118.915
                                    'search_title'  'don':1 'dont':3 'stop':4 't':2
                                   'search_artist'  'fleetwood':1 'mac':2
                                  'search_release'  'greatest':1 'hits':2
                                     'search_rest'  '00poprockelectronic':1 '2':10 'billboard':18 'don':7 'files':5,6 'loose':3,4 'pl':17 'rock':12 'set':14,16 'stop':9 'stop2':11 't':8 'unsorted':2,13,15
                                    'search_combo'  '00poprockelectronic':9 '2':18 'billboard':26 'don':1A,15 'dont':3A 'files':13,14 'fleetwood':5B 'greatest':7C 'hits':8C 'loose':11,12 'mac':6B 'pl':25 'rock':20 'set':22,24 'stop':4A,17 'stop2':19 't':2A,16 'unsorted':10,21,23
                                    'tag_tracknum'  2
                                      'num_images'  1
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-mixbeat-2', 'Q-PIANO-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-PLAY-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'soft rock', 'rock', 'pop', 'classic rock']
                                        'tag_date'  1977
                                     'discogstags'  ['rock', 'pop rock', 'classic rock']

============================== file details ==============================
                                           'mtime'  1620392244.6496398  (2021-05-07 14:57:24)
                             'size'  7702354