======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '287'
                                          'artist'  'SPK'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Metal Dance'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  ("['industrial', 'synthpop', 'noise', 'old school industrial', 'dark ambient', "
 "'experimental']")
                                     'discogstags'  "['house', 'electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  '9'
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'electronic-we-electropop or synthpop'
                                             'bpm'  '130'
                                             'key'  '8A'
                                        'acoustid'  '1e747ae6-3227-4640-bf11-b52ac76a8093'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TBPM' (BPM (beats per minute))                     '130'
'TCON' (Content type, a.k.a. Genre)                 'electronic-we-electropop or synthpop'
'TDOR' (Original release time)                      '1984'
'TDRC' (Recording time)                             '2008'
'TIT2' (Title/songname/content description)         'Metal Dance'
'TKEY' (Initial key)                                '8A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'SPK'
'TPE2' (Band/orchestra/accompaniment)               'SPK'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Wounded Bird Records'
'TRCK' (Track number/Position in set)               '7/9'
'TSO2'                                              'SPK'
'TSOP' (Performer sort order)                       'SPK'
'TXXX:Acoustid Id'                                  '1e747ae6-3227-4640-bf11-b52ac76a8093'
'TXXX:Artists'                                      'SPK'
'TXXX:BARCODE'                                      '664140038622'
'TXXX:CATALOGNUMBER'                                'WOU 386'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['house', 'electronic']
'TXXX:lastfmtags'                                   ['industrial',
 'synthpop',
 'noise',
 'old school industrial',
 'dark ambient',
 'experimental']
'TXXX:originalyear'                                 '1984'
'TXXX:q-bass'                                       '1'
'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'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.39 dB'
'TXXX:replaygain_track_peak'                        '0.484686'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'0d8ebbbc-c1b7-4941-81f9-068f4e1897b3')

========================== row from database ==========================
                                              'id'  1296583
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/metal dance.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  287
                                           'genre'  electronic-we-electropop or synthpop
                                        'filesize'  4670335
                                           'mtime'  1628353848
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] metal dance electronic we electropop or synthpop
                                      'tag_artist'  SPK
                                     'tag_release'  None
                                       'tag_title'  Metal Dance
                                             'bpm'  130.0
                                    'search_title'  'dance':2 'metal':1
                                   'search_artist'  'spk':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'dance':8 'electronic':9 'electropop':11 'files':5,6 'loose':3,4 'metal':7 'or':12 'synthpop':13 'unsorted':2 'we':10
                                    'search_combo'  '00poprockelectronic':4 'dance':2A,11 'electronic':12 'electropop':14 'files':8,9 'loose':6,7 'metal':1A,10 'or':15 'spk':3B 'synthpop':16 'unsorted':5 'we':13
                                    'tag_tracknum'  7
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['industrial', 'synthpop', 'noise', 'old school industrial', 'dark ambient', 'experimental']
                                        'tag_date'  2008
                                     'discogstags'  ['house', 'electronic']

============================== file details ==============================
                                           'mtime'  1628353848.3245807  (2021-08-07 18:30:48)
                             'size'  4670335