======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '172'
                                          'artist'  'Dr. Hook'
                                     'text_people'  ''
                                         'release'  'Greatest Hits (And More)'
                                           'title'  'The Cover of the Rolling Stone'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['oldies', 'pop', '70s', 'soft rock', 'rock', 'classic rock']"
                                     'discogstags'  "['rock', 'blues', 'folk, world, & country', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '1976'
                                        'comments'  ''
                                           'genre'  'rock-pop-soft'
                                             'bpm'  '145.685'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Greatest Hits (And More)'
'TBPM' (BPM (beats per minute))                     '145.685'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-soft'
'TDRC' (Recording time)                             '1976'
'TIT2' (Title/songname/content description)         'The Cover of the Rolling Stone'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Dr. Hook'
'TRCK' (Track number/Position in set)               '2'
'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', 'blues', 'folk, world, & country', 'classic rock']
'TXXX:lastfmtags'                                   ['oldies', 'pop', '70s', 'soft rock', 'rock', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.47 dB'
'TXXX:replaygain_track_peak'                        '0.404058'

========================== row from database ==========================
                                              'id'  1351257
                                            'path'  /data/Music/Bulk/00poprockelectronic/Dr. Hook/Dr. Hook__cifs58eb.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  172
                                           'genre'  rock-pop-soft
                                        'filesize'  2763445
                                           'mtime'  1620736465
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Hook__cifs58eb rock pop soft
                                      'tag_artist'  Dr. Hook
                                     'tag_release'  Greatest Hits (And More)
                                       'tag_title'  The Cover of the Rolling Stone
                                             'bpm'  145.685
                                    'search_title'  'cover':2 'of':3 'rolling':4 'stone':5 'the':1
                                   'search_artist'  'dr':1,2 'hook':3
                                  'search_release'  'and':3,4 'greatest':1 'hits':2 'more':5,6
                                     'search_rest'  '00poprockelectronic':1 'cifs58eb':3 'hook':2 'pop':5 'rock':4 'soft':6
                                    'search_combo'  '00poprockelectronic':15 'and':11C,12C 'cifs58eb':17 'cover':2A 'dr':6B,7B 'greatest':9C 'hits':10C 'hook':8B,16 'more':13C,14C 'of':3A 'pop':19 'rock':18 'rolling':4A 'soft':20 'stone':5A 'the':1A
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['oldies', 'pop', '70s', 'soft rock', 'rock', 'classic rock']
                                        'tag_date'  1976
                                     'discogstags'  ['rock', 'blues', 'folk, world, & country', 'classic rock']

============================== file details ==============================
                                           'mtime'  1620736464.9988418  (2021-05-11 14:34:24)
                             'size'  2763445