======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '253'
                                          'artist'  'Iron Maiden'
                                     'text_people'  ''
                                         'release'  'The X Factor'
                                           'title'  'Man On The Edge'
                                           'quals'  ("['Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-4', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['nwobhm', 'rock', 'hard rock', 'metal', 'heavy metal']"
                                     'discogstags'  "['rock', 'heavy metal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'eid-metal'
                                             'bpm'  '107.951'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The X Factor'
'TBPM' (BPM (beats per minute))                     '107.951'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal'
'TDRC' (Recording time)                             '1995'
'TIT2' (Title/songname/content description)         'Man On The Edge'
'TKEY' (Initial key)                                '9A'
'TLEN' (Length)                                     '253387'
'TMED' (Media type)                                 'DIG'
'TPE1' (Lead performer(s)/Soloist(s))               'Iron Maiden'
'TRCK' (Track number/Position in set)               '3'
'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:discogstags'                                  ['rock', 'heavy metal']
'TXXX:lastfmtags'                                   ['nwobhm', 'rock', 'hard rock', 'metal', 'heavy metal']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.90 dB'
'TXXX:replaygain_track_peak'                        '0.472356'

========================== row from database ==========================
                                              'id'  1399700
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Iron Maiden vs Bob Marley - Iron Maiden/The X Factor [1995]/Iron Maiden - 03 - Man On The Edge.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  253
                                           'genre'  eid-metal
                                        'filesize'  4056975
                                           'mtime'  1620300873
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal vs Bob Marley [1995] 03 eid metal
                                      'tag_artist'  Iron Maiden
                                     'tag_release'  The X Factor
                                       'tag_title'  Man On The Edge
                                             'bpm'  107.951
                                    'search_title'  'edge':4 'man':1 'on':2 'the':3
                                   'search_artist'  'iron':1 'maiden':2
                                  'search_release'  'factor':3 'the':1 'x':2
                                     'search_rest'  '00dwimp':1 '00metal':2 '1995':6,7 'bob':4 'eid':8 'marley':5 'metal':9 'vs':3
                                    'search_combo'  '00dwimp':10 '00metal':11 '1995':15,16 'bob':13 'edge':4A 'eid':17 'factor':9C 'iron':5B 'maiden':6B 'man':1A 'marley':14 'metal':18 'on':2A 'the':3A,7C 'vs':12 'x':8C
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-1', 'q-bass-3', 'q-grit-4']
                                      'lastfmtags'  ['nwobhm', 'rock', 'hard rock', 'metal', 'heavy metal']
                                        'tag_date'  1995
                                     'discogstags'  ['rock', 'heavy metal']

============================== file details ==============================
                                           'mtime'  1620300872.5360007  (2021-05-06 13:34:32)
                             'size'  4056975