======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '168'
                                          'artist'  'The Crew Cuts'
                                     'text_people'  'Carl Feaster/Claude Feaster/Floyd McRae/James Edwards/James Keyes'
                                         'release'  'The Best of the Crew Cuts: The Mercury Years'
                                           'title'  'Sh-Boom'
                                           'quals'  ("['Q-JZFKS-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-1', 'q-play-2', 'q-chart-1', "
 "'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['rock and roll', 'rock n roll', 'doo wop', '50s', 'oldies']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '1954'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '127.846'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '54-002 POS 1'
'COMM:ID3v1 Comment:XXX'                            '54-002 POS 1'
'MCDI' (Music CD identifier)                        MCDI(data=b'1\x006\x00+\x009\x006\x00+\x002\x00B\x003\x006\x00+\x005\x00C\x00B\x002\x00+\x008\x005\x002\x00A\x00+\x00A\x00F\x003\x007\x00+\x00D\x00A\x002\x007\x00+\x001\x000\x008\x009\x009\x00+\x001\x003\x00C\x000\x009\x00+\x001\x006\x001\x00B\x008\x00+\x001\x009\x004\x002\x006\x00+\x001\x00C\x003\x001\x005\x00+\x001\x00E\x009\x005\x001\x00+\x002\x001\x008\x009\x002\x00+\x002\x004\x003\x00A\x006\x00+\x002\x006\x00E\x003\x000\x00+\x002\x009\x00C\x00C\x002\x00+\x002\x00C\x00D\x007\x003\x00+\x002\x00F\x002\x007\x00E\x00+\x003\x001\x00D\x008\x005\x00+\x003\x004\x004\x001\x008\x00+\x003\x007\x000\x005\x000\x00+\x003\x009\x005\x003\x002\x00+\x003\x00B\x00C\x008\x001\x00\x00\x00')
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'PRIV:WM/MediaClassSecondaryID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/MediaClassSecondaryID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
'PRIV:WM/Provider:A\x00M\x00G\x00\x00\x00'          PRIV(owner='WM/Provider', data=b'A\x00M\x00G\x00\x00\x00')
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'PRIV:WM/WMCollectionID:q³ï\rÄæÏI\x8f|Ö\x05´\x96\x12K'  PRIV(owner='WM/WMCollectionID', data=b'q\xb3\xef\r\xc4\xe6\xcfI\x8f|\xd6\x05\xb4\x96\x12K')
'PRIV:WM/WMContentID:&Ù\x87Ø\x9b\x03\x05O¤±\\¥×\\\x9eí'  PRIV(owner='WM/WMContentID', data=b'&\xd9\x87\xd8\x9b\x03\x05O\xa4\xb1\\\xa5\xd7\\\x9e\xed')
'TALB' (Album/Movie/Show title)                     'The Best of the Crew Cuts: The Mercury Years'
'TBPM' (BPM (beats per minute))                     '127.846'
'TCOM' (Composer)                                   'Carl Feaster/Claude Feaster/Floyd McRae/James Edwards/James Keyes'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1954'
'TIT2' (Title/songname/content description)         'Sh-Boom'
'TKEY' (Initial key)                                '7B'
'TLEN' (Length)                                     '168906'
'TPE1' (Lead performer(s)/Soloist(s))               'Crew Cuts'
'TPE2' (Band/orchestra/accompaniment)               'The Crew Cuts'
'TPUB' (Publisher)                                  'Mercury'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rock and roll', 'rock n roll', 'doo wop', '50s', 'oldies']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.77 dB'
'TXXX:replaygain_track_peak'                        '0.589909'

========================== row from database ==========================
                                              'id'  1427917
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1954/54-002 - Crew Cuts - Sh-Boom.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  168
                                           'genre'  prerock-vocal
                                        'filesize'  6754068
                                           'mtime'  1620385746
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1954 54 002 prerock vocal
                                      'tag_artist'  The Crew Cuts
                                     'tag_release'  The Best of the Crew Cuts: The Mercury Years
                                       'tag_title'  Sh-Boom
                                             'bpm'  127.846
                                    'search_title'  'boom':2 'sh':1 'shboom':3
                                   'search_artist'  'crew':2 'cuts':3 'the':1
                                  'search_release'  'best':2 'crew':4 'cuts':5,6 'mercury':7 'of':3 'the':1 'years':8
                                     'search_rest'  '00oldiepop':5 '1954':6 '54':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'vocal':9
                                    'search_combo'  '00oldiepop':19 '1954':20 '54':21 'best':8C 'boom':2A 'country':18 'crew':5B,10C 'cuts':6B,11C,12C 'exotica':16 'jazz':15 'mercury':13C 'of':9C 'oldies':17 'prerock':22 'sh':1A 'shboom':3A 'the':4B,7C 'vocal':23 'years':14C
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['rock and roll', 'rock n roll', 'doo wop', '50s', 'oldies']
                                        'tag_date'  1954
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620385746.051486  (2021-05-07 13:09:06)
                             'size'  6754068