======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '247'
                                          'artist'  'The Avett Brothers'
                                     'text_people'  ''
                                         'release'  'I And Love And You'
                                           'title'  'And It Spread'
                                           'quals'  ("['Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-2', 'Q-OLDST-1', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-3']")
                                      'lastfmtags'  "['americana', 'indie', 'country', 'bluegrass', 'alt country', 'folk']"
                                     'discogstags'  "['folk, world, & country', 'folk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '2009'
                                        'comments'  ''
                                           'genre'  'ifs-unsorted'
                                             'bpm'  '136.551'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            '0'
'TALB' (Album/Movie/Show title)                     'I And Love And You'
'TBPM' (BPM (beats per minute))                     '136.551'
'TCON' (Content type, a.k.a. Genre)                 'ifs-unsorted'
'TDRC' (Recording time)                             '2009'
'TIT2' (Title/songname/content description)         'And It Spread'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Avett Brothers'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['folk, world, & country', 'folk']
'TXXX:lastfmtags'                                   ['americana', 'indie', 'country', 'bluegrass', 'alt country', 'folk']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.35 dB'
'TXXX:replaygain_track_peak'                        '0.413868'

========================== row from database ==========================
                                              'id'  1334111
                                            'path'  /data/Music/Bulk/00poprockelectronic/The Avett Brothers/04 And It Spread.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  247
                                           'genre'  ifs-unsorted
                                        'filesize'  5931213
                                           'mtime'  1620572196
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 04 ifs unsorted
                                      'tag_artist'  The Avett Brothers
                                     'tag_release'  I And Love And You
                                       'tag_title'  And It Spread
                                             'bpm'  136.551
                                    'search_title'  'and':1 'it':2 'spread':3
                                   'search_artist'  'avett':2 'brothers':3 'the':1
                                  'search_release'  'and':2 'i':1 'love':3 'you':4
                                     'search_rest'  '00poprockelectronic':1 'ifs':2 'unsorted':3
                                    'search_combo'  '00poprockelectronic':11 'and':1A,8C 'avett':5B 'brothers':6B 'i':7C 'ifs':12 'it':2A 'love':9C 'spread':3A 'the':4B 'unsorted':13 'you':10C
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-3', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['americana', 'indie', 'country', 'bluegrass', 'alt country', 'folk']
                                        'tag_date'  2009
                                     'discogstags'  ['folk, world, & country', 'folk']

============================== file details ==============================
                                           'mtime'  1620572196.3972342  (2021-05-09 16:56:36)
                             'size'  5931213