======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '194'
                                          'artist'  'The Arrogant Worms'
                                     'text_people'  ''
                                         'release'  'Dirt!'
                                           'title'  'Celine Dion'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-3', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['funny', 'comedy', 'humour', 'folk', 'canadian']"
                                     'discogstags'  ("['rock', 'pop', 'folk, world, & country', 'comedy', 'celtic', 'pop rock', "
 "'folk']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'entertaining-comedians'
                                             'bpm'  '142.708'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Dirt!'
'TBPM' (BPM (beats per minute))                     '142.708'
'TCON' (Content type, a.k.a. Genre)                 'entertaining-comedians'
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         'Celine Dion'
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Arrogant Worms'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['rock',
 'pop',
 'folk, world, & country',
 'comedy',
 'celtic',
 'pop rock',
 'folk']
'TXXX:lastfmtags'                                   ['funny', 'comedy', 'humour', 'folk', 'canadian']
'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'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.07 dB'
'TXXX:replaygain_track_peak'                        '0.722802'

========================== row from database ==========================
                                              'id'  1355075
                                            'path'  /data/Music/Bulk/00spent/Arrogant Worms/Dirt!/MBZ;#Arrogant Worms;#Dirt!;#04;#Celine Dion.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  194
                                           'genre'  entertaining-comedians
                                        'filesize'  3116476
                                           'mtime'  1620647229
                                   'redo_metaread'  0
                                        'rest_str'   00spent MBZ;#Arrogant Worms;#Dirt!;#04;#Celine entertaining comedians
                                      'tag_artist'  The Arrogant Worms
                                     'tag_release'  Dirt!
                                       'tag_title'  Celine Dion
                                             'bpm'  142.708
                                    'search_title'  'celine':1 'dion':2
                                   'search_artist'  'arrogant':2 'the':1 'worms':3
                                  'search_release'  'dirt':1
                                     'search_rest'  '00spent':1 '04':8,12 'arrogant':3,5 'celine':9,13 'comedians':15 'dirt':7,11 'entertaining':14 'mbz':2,4 'worms':6,10
                                    'search_combo'  '00spent':7 '04':14,18 'arrogant':4B,9,11 'celine':1A,15,19 'comedians':21 'dion':2A 'dirt':6C,13,17 'entertaining':20 'mbz':8,10 'the':3B 'worms':5B,12,16
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', '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'  ['funny', 'comedy', 'humour', 'folk', 'canadian']
                                        'tag_date'  1999
                                     'discogstags'  ['rock', 'pop', 'folk, world, & country', 'comedy', 'celtic', 'pop rock', 'folk']

============================== file details ==============================
                                           'mtime'  1620647229.0303042  (2021-05-10 13:47:09)
                             'size'  3116476