======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '593'
                                          'artist'  'Lustmord'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Heresy, Part Ii'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-3', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['dark ambient', 'industrial', 'electronic', 'experimental', 'ambient']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'electronic-calmer-drone;electronic;electronic-ambient-dark'
                                             'bpm'  '137.7'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '137.7'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-calmer-drone', 'electronic', 'electronic-ambient-dark']
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Heresy, Part Ii'
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'Lustmord'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['dark ambient', 'industrial', 'electronic', 'experimental', 'ambient']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-3.17 dB'
'TXXX:replaygain_track_peak'                        '0.495949'

========================== row from database ==========================
                                              'id'  1423621
                                            'path'  /data/Music/Bulk/00poprockelectronic/00drone/Lustmord - Heresy, Part Ii.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  593
                                           'genre'  electronic-calmer-drone;electronic;electronic-ambient-dark
                                        'filesize'  11880562
                                           'mtime'  1636913647
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 00drone electronic calmer drone;electronic;electronic ambient dark
                                      'tag_artist'  Lustmord
                                     'tag_release'  None
                                       'tag_title'  Heresy, Part Ii
                                             'bpm'  137.7
                                    'search_title'  'heresy':1,2 'ii':4 'part':3
                                   'search_artist'  'lustmord':1
                                  'search_release'  
                                     'search_rest'  '00drone':2 '00poprockelectronic':1 'ambient':11 'calmer':4 'dark':12 'drone':5,8 'electronic':3,6,7,9,10
                                    'search_combo'  '00drone':7 '00poprockelectronic':6 'ambient':16 'calmer':9 'dark':17 'drone':10,13 'electronic':8,11,12,14,15 'heresy':1A,2A 'ii':4A 'lustmord':5B 'part':3A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-3', 'q-chart-1', 'q-other-4', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['dark ambient', 'industrial', 'electronic', 'experimental', 'ambient']
                                        'tag_date'  2000
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1636913646.9548733  (2021-11-14 19:14:06)
                             'size'  11880562