======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '488'
                                          'artist'  'The Dave Matthews Band'
                                     'text_people'  ''
                                         'release'  'Before These Crowded Streets'
                                           'title'  'Crush'
                                           'quals'  ("['Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', "
 "'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['rock', 'alternative', 'alternative rock', 'acoustic rock', 'jam']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'rock-unsorted'
                                             'bpm'  '94.064'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Before These Crowded Streets'
'TBPM' (BPM (beats per minute))                     '94.064'
'TCON' (Content type, a.k.a. Genre)                 'rock-unsorted'
'TIT2' (Title/songname/content description)         'Crush'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Dave Matthews Band'
'TRCK' (Track number/Position in set)               '8'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rock', 'alternative', 'alternative rock', 'acoustic rock', 'jam']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.48 dB'
'TXXX:replaygain_track_peak'                        '0.523537'

========================== row from database ==========================
                                              'id'  1418024
                                            'path'  /data/Music/Bulk/00poprockelectronic-poprock-indierock/The Dave Matthews Band/The Dave Matthews Band__MBZ;#The Dave Matthews Band;#Before These Crowded Streets;#08;#Crush.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  488
                                           'genre'  rock-unsorted
                                        'filesize'  7812818
                                           'mtime'  1620389004
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic poprock indierock Band__MBZ;#The Band;#Before Streets;#08;#Crush rock unsorted
                                      'tag_artist'  The Dave Matthews Band
                                     'tag_release'  Before These Crowded Streets
                                       'tag_title'  Crush
                                             'bpm'  94.064
                                    'search_title'  'crush':1
                                   'search_artist'  'band':4 'dave':2 'matthews':3 'the':1
                                  'search_release'  'before':1 'crowded':3 'streets':4 'these':2
                                     'search_rest'  '00poprockelectronic':1 '08':15,18 'band':4,7,10,12 'before':11,13 'crush':16,19 'indierock':3 'mbz':5,8 'poprock':2 'rock':20 'streets':14,17 'the':6,9 'unsorted':21
                                    'search_combo'  '00poprockelectronic':10 '08':24,27 'band':5B,13,16,19,21 'before':6C,20,22 'crowded':8C 'crush':1A,25,28 'dave':3B 'indierock':12 'matthews':4B 'mbz':14,17 'poprock':11 'rock':29 'streets':9C,23,26 'the':2B,15,18 'these':7C 'unsorted':30
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-2', 'q-other-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'alternative', 'alternative rock', 'acoustic rock', 'jam']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620389003.7687218  (2021-05-07 14:03:23)
                             'size'  7812818