======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '189'
                                          'artist'  'Linkin Park'
                                     'text_people'  ''
                                         'release'  'Hybrid Theory (Asian Version)'
                                           'title'  'By Myself'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-4', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-4', 'q-play-2', "
 "'q-chart-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['alternative rock', 'alternative', 'metal', 'nu metal', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'eid-metal-nu'
                                             'bpm'  '137.385'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Hybrid Theory (Asian Version)'
'TBPM' (BPM (beats per minute))                     '137.385'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-nu'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         'By Myself'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Linkin Park'
'TRCK' (Track number/Position in set)               '7'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '4'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['alternative rock', 'alternative', 'metal', 'nu metal', 'rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.54 dB'
'TXXX:replaygain_track_peak'                        '0.307347'

========================== row from database ==========================
                                              'id'  1284336
                                            'path'  /data/Music/Bulk/00poprockelectronic/Linkin Park/MBZ;#Linkin Park;#Hybrid Theory (Asian version);#07;#By Myself.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  189
                                           'genre'  eid-metal-nu
                                        'filesize'  4562000
                                           'mtime'  1620311143
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic MBZ;#Linkin Park;#Hybrid version);#07;#By eid metal nu
                                      'tag_artist'  Linkin Park
                                     'tag_release'  Hybrid Theory (Asian Version)
                                       'tag_title'  By Myself
                                             'bpm'  137.385
                                    'search_title'  'by':1 'myself':2
                                   'search_artist'  'linkin':1 'park':2
                                  'search_release'  'asian':3,4 'hybrid':1 'theory':2 'version':5,6
                                     'search_rest'  '00poprockelectronic':1 '07':11,14 'by':12,15 'eid':16 'hybrid':7,9 'linkin':3,5 'mbz':2,4 'metal':17 'nu':18 'park':6,8 'version':10,13
                                    'search_combo'  '00poprockelectronic':11 '07':21,24 'asian':7C,8C 'by':1A,22,25 'eid':26 'hybrid':5C,17,19 'linkin':3B,13,15 'mbz':12,14 'metal':27 'myself':2A 'nu':28 'park':4B,16,18 'theory':6C 'version':9C,10C,20,23
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-4', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-1', 'q-bass-3', 'q-grit-4']
                                      'lastfmtags'  ['alternative rock', 'alternative', 'metal', 'nu metal', 'rock']
                                        'tag_date'  2002
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620311142.8151767  (2021-05-06 16:25:42)
                             'size'  4562000