======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '184'
                                          'artist'  'The Kovenant'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Aria Galactica'
                                           '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-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  ("['industrial metal', 'cyber metal', 'black metal', 'symphonic black metal', "
 "'industrial']")
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'eid-metal-industrial'
                                             'bpm'  '116.5'
                                             'key'  '12A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '116.5'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-industrial'
'TIT2' (Title/songname/content description)         'Aria Galactica'
'TKEY' (Initial key)                                '12A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Kovenant'
'TXXX:Mp3gain_minmax'                               '128,190'
'TXXX:Mp3gain_undo'                                 '+004,+004,N'
'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'
'TXXX:lastfmtags'                                   ['industrial metal',
 'cyber metal',
 'black metal',
 'symphonic black metal',
 'industrial']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.81 dB'
'TXXX:replaygain_track_peak'                        '0.484832'

========================== row from database ==========================
                                              'id'  1301270
                                            'path'  /data/Music/Bulk/00poprockelectronic/The Kovenant/The Kovenant - Aria Galactica.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  184
                                           'genre'  eid-metal-industrial
                                        'filesize'  2952663
                                           'mtime'  1620311107
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic eid metal industrial
                                      'tag_artist'  The Kovenant
                                     'tag_release'  None
                                       'tag_title'  Aria Galactica
                                             'bpm'  116.5
                                    'search_title'  'aria':1 'galactica':2
                                   'search_artist'  'kovenant':2 'the':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'eid':2 'industrial':4 'metal':3
                                    'search_combo'  '00poprockelectronic':5 'aria':1A 'eid':6 'galactica':2A 'industrial':8 'kovenant':4B 'metal':7 'the':3B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  12A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-1', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['industrial metal', 'cyber metal', 'black metal', 'symphonic black metal', 'industrial']
                                        'tag_date'  
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620311107.4674413  (2021-05-06 16:25:07)
                             'size'  2952663