======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '124'
                                          'artist'  'Billy Williams'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Date With The Blues'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
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 "'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\', "rock \'n\' roll", \'60s\', \'pop\']'
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '030b'
                                      'tracktotal'  ''
                                            'date'  '1957'
                                        'comments'  ''
                                           'genre'  'rock-pop-early-rocknroll'
                                             'bpm'  '130.650'
                                             'key'  '4B'
                                        'acoustid'  ''
rest: ''

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

'MCDI' (Music CD identifier)                        MCDI(data=b'1\x008\x00+\x009\x006\x00+\x002\x005\x003\x006\x00+\x007\x001\x00E\x001\x00+\x00B\x003\x00A\x000\x00+\x00F\x006\x002\x003\x00+\x001\x004\x002\x000\x00C\x00+\x001\x008\x008\x007\x008\x00+\x001\x00A\x00E\x006\x00D\x00+\x001\x00D\x003\x001\x00D\x00+\x002\x000\x001\x00A\x005\x00+\x002\x003\x001\x000\x008\x00+\x002\x006\x006\x001\x009\x00+\x002\x009\x00C\x007\x003\x00+\x002\x00E\x002\x000\x00D\x00+\x003\x003\x002\x009\x005\x00+\x003\x006\x004\x006\x00B\x00+\x003\x00A\x003\x00F\x00F\x00+\x003\x00E\x00D\x003\x000\x00+\x004\x001\x00B\x007\x001\x00+\x004\x004\x00D\x004\x005\x00+\x004\x008\x00E\x003\x006\x00+\x004\x00C\x001\x007\x00E\x00+\x004\x00F\x004\x006\x000\x00+\x005\x004\x007\x006\x003\x00+\x005\x007\x00C\x001\x00E\x00\x00\x00')
'PRIV:AverageLevel:\x16\x13\x00\x00'                PRIV(owner='AverageLevel', data=b'\x16\x13\x00\x00')
'PRIV:PeakValue:þ\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xfe\x7f\x00\x00')
'PRIV:WM/MediaClassPrimaryID:¼}`Ñ#ãâK\x86¡H¤*(D\x1e'  PRIV(owner='WM/MediaClassPrimaryID', data=b'\xbc}`\xd1#\xe3\xe2K\x86\xa1H\xa4*(D\x1e')
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'PRIV:WM/UniqueFileIdentifier:;\x00\x00\x00'        PRIV(owner='WM/UniqueFileIdentifier', data=b';\x00\x00\x00')
'TBPM' (BPM (beats per minute))                     '130.650'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-early-rocknroll'
'TDRC' (Recording time)                             '1957'
'TIT2' (Title/songname/content description)         'Date With The Blues'
'TKEY' (Initial key)                                '4B'
'TLEN' (Length)                                     '125226'
'TPE1' (Lead performer(s)/Soloist(s))               'Billy Williams'
'TRCK' (Track number/Position in set)               '030b'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rock and roll', 'rock n roll', "rock 'n' roll", '60s', 'pop']
'TXXX:q-bass'                                       '3'
'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'                        '+1.79 dB'
'TXXX:replaygain_track_peak'                        '0.499925'

========================== row from database ==========================
                                              'id'  1454663
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1957/1957-030b - Billy Williams - Date With The Blues.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  124
                                           'genre'  rock-pop-early-rocknroll
                                        'filesize'  5001304
                                           'mtime'  1622659470
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1957 1957 030b rock pop early rocknroll
                                      'tag_artist'  Billy Williams
                                     'tag_release'  None
                                       'tag_title'  Date With The Blues
                                             'bpm'  130.65
                                    'search_title'  'blues':4 'date':1 'the':3 'with':2
                                   'search_artist'  'billy':1 'williams':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '030b':7 '1957':6 'country':4 'early':10 'exotica':2 'jazz':1 'oldies':3 'pop':9 'rock':8 'rocknroll':11
                                    'search_combo'  '00oldiepop':11 '030b':13 '1957':12 'billy':5B 'blues':4A 'country':10 'date':1A 'early':16 'exotica':8 'jazz':7 'oldies':9 'pop':15 'rock':14 'rocknroll':17 'the':3A 'williams':6B 'with':2A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4B
                                           '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-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['rock and roll', 'rock n roll', "rock 'n' roll", '60s', 'pop']
                                        'tag_date'  1957
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1622659469.6803744  (2021-06-02 20:44:29)
                             'size'  5001304