======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '234'
                                          'artist'  'Theatre of Tragedy'
                                     'text_people'  ''
                                         'release'  'Theatre of Tragedy'
                                           'title'  'Sweet Art Thou'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-3', 'q-play-3', "
 "'q-chart-3', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['metal', 'gothic', 'female fronted metal', 'doom metal', 'gothic metal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  ''
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'eid-metal-doom or gothic'
                                             'bpm'  '142.910'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Theatre of Tragedy'
'TBPM' (BPM (beats per minute))                     '142.910'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-doom or gothic'
'TDRC' (Recording time)                             '1995'
'TIT2' (Title/songname/content description)         'Sweet Art Thou'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Theatre of Tragedy'
'TRCK' (Track number/Position in set)               '6'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['metal', 'gothic', 'female fronted metal', 'doom metal', 'gothic metal']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.38 dB'
'TXXX:replaygain_track_peak'                        '0.497258'

========================== row from database ==========================
                                              'id'  1395241
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Theatre of Tragedy/Theatre of Tragedy - Theatre of Tragedy - 06 - Sweet art Thou.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  234
                                           'genre'  eid-metal-doom or gothic
                                        'filesize'  3751614
                                           'mtime'  1620310307
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal 06 art eid metal doom or gothic
                                      'tag_artist'  Theatre of Tragedy
                                     'tag_release'  Theatre of Tragedy
                                       'tag_title'  Sweet Art Thou
                                             'bpm'  142.91
                                    'search_title'  'art':2 'sweet':1 'thou':3
                                   'search_artist'  'of':2 'theatre':1 'tragedy':3
                                  'search_release'  'of':2 'theatre':1 'tragedy':3
                                     'search_rest'  '00dwimp':1 '00metal':2 'art':3 'doom':6 'eid':4 'gothic':8 'metal':5 'or':7
                                    'search_combo'  '00dwimp':10 '00metal':11 'art':2A,12 'doom':15 'eid':13 'gothic':17 'metal':14 'of':5B,8C 'or':16 'sweet':1A 'theatre':4B,7C 'thou':3A 'tragedy':6B,9C
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-3', 'q-other-4', 'Q-HAP-1', 'q-bass-2', 'q-grit-3']
                                      'lastfmtags'  ['metal', 'gothic', 'female fronted metal', 'doom metal', 'gothic metal']
                                        'tag_date'  1995
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620310307.4489093  (2021-05-06 16:11:47)
                             'size'  3751614