======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '100'
                                          'artist'  'The Carpenters'
                                     'text_people'  ''
                                         'release'  'The Carpenters Now and Then'
                                           'title'  'Fun, Fun, Fun'
                                           'quals'  ("['Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-OLDST-2', "
 "'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['70s', 'pop', 'easy listening', 'female vocalists', 'oldies']"
                                     'discogstags'  "['pop', 'vocal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  '1975'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-squeaky'
                                             'bpm'  '106.029'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Carpenters Now and Then'
'TBPM' (BPM (beats per minute))                     '106.029'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-squeaky'
'TDRC' (Recording time)                             '1975'
'TENC' (Encoded by)                                 'RioPort MP3 2.0'
'TIT2' (Title/songname/content description)         'Fun, Fun, Fun'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Carpenters'
'TRCK' (Track number/Position in set)               '7'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['pop', 'vocal']
'TXXX:lastfmtags'                                   ['70s', 'pop', 'easy listening', 'female vocalists', 'oldies']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.44 dB'
'TXXX:replaygain_track_peak'                        '0.534510'

========================== row from database ==========================
                                              'id'  1288278
                                            'path'  /data/Music/Bulk/00poprockelectronic/Carpenters/diversen/Carpenters - Fun, Fun, Fun).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  100
                                           'genre'  electronic-generic or radio-squeaky
                                        'filesize'  1605632
                                           'mtime'  1620568266
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic diversen Fun) electronic generic or radio squeaky
                                      'tag_artist'  The Carpenters
                                     'tag_release'  The Carpenters Now and Then
                                       'tag_title'  Fun, Fun, Fun
                                             'bpm'  106.029
                                    'search_title'  'fun':1,2
                                   'search_artist'  'carpenters':2 'the':1
                                  'search_release'  'and':4 'carpenters':2 'now':3 'the':1 'then':5
                                     'search_rest'  '00poprockelectronic':1 'diversen':2 'electronic':5 'fun':3,4 'generic':6 'or':7 'radio':8 'squeaky':9
                                    'search_combo'  '00poprockelectronic':10 'and':8C 'carpenters':4B,6C 'diversen':11 'electronic':14 'fun':1A,2A,12,13 'generic':15 'now':7C 'or':16 'radio':17 'squeaky':18 'the':3B,5C 'then':9C
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  11B
                                           '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-2', 'q-syn-1', 'q-chart-3', 'q-other-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['70s', 'pop', 'easy listening', 'female vocalists', 'oldies']
                                        'tag_date'  1975
                                     'discogstags'  ['pop', 'vocal']

============================== file details ==============================
                                           'mtime'  1620568266.2940698  (2021-05-09 15:51:06)
                             'size'  1605632