======================== unified (from filesystem) ========================
                                         'bitrate'  '165.026'
                                        'duration'  '232'
                                          'artist'  'Press the Button'
                                     'text_people'  ''
                                         'release'  'Free Speech for Sale'
                                           'title'  'The Door is Closing'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  '34'
                                            'date'  '2003'
                                        'comments'  ''
                                           'genre'  'electronic-experimental-collage'
                                             'bpm'  '109.8'
                                             'key'  '6A'
                                        'acoustid'  'bba46022-31cc-4389-ad3a-c5810785220e'
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Free Speech for Sale'
'TBPM' (BPM (beats per minute))                     '109.8'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'electronic-experimental-collage'
'TDOR' (Original release time)                      '2002'
'TDRC' (Recording time)                             '2003'
'TIT2' (Title/songname/content description)         'The Door is Closing'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Press the Button'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '6/34'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Press the Button'
'TXXX:Acoustid Id'                                  'bba46022-31cc-4389-ad3a-c5810785220e'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
'TXXX:MusicBrainz Album Id'                         'cc3c2ceb-877f-428b-93c7-40e137b1282f'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '29386463-fcc0-4647-8df7-8a76c64a6aab'
'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:SCRIPT'                                       'Latn'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.36 dB'
'TXXX:replaygain_track_peak'                        '0.453011'
'TXXX:tracknum'                                     '06'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'2fb3f556-f5bf-4ad0-81a3-4dcde693257b')

========================== row from database ==========================
                                              'id'  1371348
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Escape Mechanism - Free Speech for Sale [183k VBR]/06 The Button - The Door Is Closing.mp3
                                         'working'  None
                                         'bitrate'  165
                                    'duration_sec'  232
                                           'genre'  electronic-experimental-collage
                                        'filesize'  4790377
                                           'mtime'  1636920704
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Escape Mechanism [183k VBR] 06 Is electronic experimental collage
                                      'tag_artist'  Press the Button
                                     'tag_release'  Free Speech for Sale
                                       'tag_title'  The Door is Closing
                                             'bpm'  109.8
                                    'search_title'  'closing':4 'door':2 'is':3 'the':1
                                   'search_artist'  'button':3 'press':1 'the':2
                                  'search_release'  'for':3 'free':1 'sale':4 'speech':2
                                     'search_rest'  '183k':3,4 'collage':10 'electronic':8 'escape':1 'experimental':9 'is':7 'mechanism':2 'vbr':5,6
                                    'search_combo'  '183k':14,15 'button':7B 'closing':4A 'collage':21 'door':2A 'electronic':19 'escape':12 'experimental':20 'for':10C 'free':8C 'is':3A,18 'mechanism':13 'press':5B 'sale':11C 'speech':9C 'the':1A,6B 'vbr':16,17
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-1', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  2003
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636920703.7195537  (2021-11-14 21:11:43)
                             'size'  4790377