======================== unified (from filesystem) ========================
                                         'bitrate'  '196.566'
                                        'duration'  '166'
                                          'artist'  'Motörhead'
                                     'text_people'  ''
                                         'release'  'Ace of Spades'
                                           'title'  'The Hammer'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-4', 'q-play-3', "
 "'q-chart-3', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['speed metal', 'hard rock', 'metal', 'rock', 'heavy metal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1980'
                                        'comments'  ''
                                           'genre'  'eid-metal-heavy'
                                             'bpm'  '140.2'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Ace of Spades'
'TBPM' (BPM (beats per minute))                     '140.2'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-heavy'
'TDRC' (Recording time)                             '1980'
'TIT2' (Title/songname/content description)         'The Hammer'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Motörhead'
'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'                                   ['speed metal', 'hard rock', 'metal', 'rock', 'heavy metal']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'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'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.04 dB'
'TXXX:replaygain_track_peak'                        '0.454547'

========================== row from database ==========================
                                              'id'  1399931
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Motörhead - Motorhead/Ace Of Spades/Mot_rhead - The Hammer.mp3
                                         'working'  None
                                         'bitrate'  196
                                    'duration_sec'  166
                                           'genre'  eid-metal-heavy
                                        'filesize'  4104064
                                           'mtime'  1620311090
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal Motorhead Of Mot_rhead eid metal heavy
                                      'tag_artist'  Motörhead
                                     'tag_release'  Ace of Spades
                                       'tag_title'  The Hammer
                                             'bpm'  140.2
                                    'search_title'  'hammer':2 'the':1
                                   'search_artist'  'motorhead':1,2
                                  'search_release'  'ace':1 'of':2 'spades':3
                                     'search_rest'  '00dwimp':1 '00metal':2 'eid':7 'heavy':9 'metal':8 'mot':5 'motorhead':3 'of':4 'rhead':6
                                    'search_combo'  '00dwimp':8 '00metal':9 'ace':5C 'eid':14 'hammer':2A 'heavy':16 'metal':15 'mot':12 'motorhead':3B,4B,10 'of':6C,11 'rhead':13 'spades':7C 'the':1A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-4', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-1', 'q-bass-1', 'q-grit-4']
                                      'lastfmtags'  ['speed metal', 'hard rock', 'metal', 'rock', 'heavy metal']
                                        'tag_date'  1980
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620311089.7072177  (2021-05-06 16:24:49)
                             'size'  4104064