======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '511'
                                          'artist'  'Yes'
                                     'text_people'  ''
                                         'release'  'Yesyears (Disc 2)'
                                           'title'  'Roundabout'
                                           'quals'  ("['Q-OLDST-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-4', "
 "'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['rock', 'progressive rock', 'british', 'progressive', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'rock-cppex'
                                             'bpm'  '135.004'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Yesyears (Disc 2)'
'TBPM' (BPM (beats per minute))                     '135.004'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         'Roundabout'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Yes'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rock', 'progressive rock', 'british', 'progressive', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.18 dB'
'TXXX:replaygain_track_peak'                        '0.547560'

========================== row from database ==========================
                                              'id'  1323903
                                            'path'  /data/Music/Bulk/00poprockelectronic/Yes/MBZ;#Yes;#YesYears (disc 2);#01;#Roundabout.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  511
                                           'genre'  rock-cppex
                                        'filesize'  12287507
                                           'mtime'  1620737455
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic MBZ;#Yes;#YesYears (disc 2);#01;#Roundabout rock cppex
                                      'tag_artist'  Yes
                                     'tag_release'  Yesyears (Disc 2)
                                       'tag_title'  Roundabout
                                             'bpm'  135.004
                                    'search_title'  'roundabout':1
                                   'search_artist'  'yes':1
                                  'search_release'  '2':4,5 'disc':2,3 'yesyears':1
                                     'search_rest'  '00poprockelectronic':1 '01':11,14 '2':10,13 'cppex':17 'disc':8,9 'mbz':2,5,18,21 'rock':16 'roundabout':12,15 'years':24 'yes':3,6,19,20,22,23 'yesyears':4,7
                                    'search_combo'  '00poprockelectronic':8 '01':18,21 '2':6C,7C,17,20 'cppex':24 'disc':4C,5C,15,16 'mbz':9,12,25,28 'rock':23 'roundabout':1A,19,22 'years':31 'yes':2B,10,13,26,27,29,30 'yesyears':3C,11,14
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-4', 'q-other-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'progressive rock', 'british', 'progressive', 'classic rock']
                                        'tag_date'  2002
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620737454.7573555  (2021-05-11 14:50:54)
                             'size'  12287507