======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '258'
                                          'artist'  'Norma Waterson'
                                     'text_people'  'Norman Curtis/Oscar Brown, Jr.'
                                         'release'  'The Global Sounds of Hannibal Records'
                                           'title'  'Rags and Old Iron'
                                           'quals'  ("['Q-HAP-3', 'Q-OLDST-1', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-LOCALNESS-3', "
 "'Q-HHRNBTT-1', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['folk', 'female vocalists', 'british folk', 'english folk', '1996']"
                                     'discogstags'  "['folk, world, & country', 'folk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  ''
                                            'date'  '1996'
                                        'comments'  ''
                                           'genre'  'loc-unsorted-mix'
                                             'bpm'  '102.6'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
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'TALB' (Album/Movie/Show title)                     'The Global Sounds of Hannibal Records'
'TBPM' (BPM (beats per minute))                     '102.6'
'TCOM' (Composer)                                   'Norman Curtis/Oscar Brown, Jr.'
'TCON' (Content type, a.k.a. Genre)                 'loc-unsorted-mix'
'TDRC' (Recording time)                             '1996'
'TIT2' (Title/songname/content description)         'Rags and Old Iron'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Norma Waterson'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPUB' (Publisher)                                  'Rykodisc'
'TRCK' (Track number/Position in set)               '6'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['folk, world, & country', 'folk']
'TXXX:lastfmtags'                                   ['folk', 'female vocalists', 'british folk', 'english folk', '1996']
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.48 dB'
'TXXX:replaygain_track_peak'                        '0.644451'

========================== row from database ==========================
                                              'id'  1476609
                                            'path'  /data/Music/Bulk/00localcharacter/VA. World 1： Trad/The Global Sounds Of Hannibal Records (LaFolieDuJour, 2010) [VBR]/16 NORMA WATERSON Rags and Old Iron.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  258
                                           'genre'  loc-unsorted-mix
                                        'filesize'  5199831
                                           'mtime'  1621629895
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter VA. World 1： Trad Of (LaFolieDuJour, 2010) [VBR] 16 NORMA WATERSON loc unsorted mix
                                      'tag_artist'  Norma Waterson
                                     'tag_release'  The Global Sounds of Hannibal Records
                                       'tag_title'  Rags and Old Iron
                                             'bpm'  102.6
                                    'search_title'  'and':2 'iron':4 'old':3 'rags':1
                                   'search_artist'  'norma':1 'waterson':2
                                  'search_release'  'global':2 'hannibal':5 'of':4 'records':6 'sounds':3 'the':1
                                     'search_rest'  '1':4,5,6 '2010':11,12 'du':23 'folie':22 'jour':24,25 'la':20,21 'lafoliedujour':9,10 'loc':17 'mix':19 'norma':15 'of':8 'trad':7 'unsorted':18 'va':1,2 'vbr':13,14 'waterson':16 'world':3
                                    'search_combo'  '1':16,17,18 '2010':23,24 'and':2A 'du':35 'folie':34 'global':8C 'hannibal':11C 'iron':4A 'jour':36,37 'la':32,33 'lafoliedujour':21,22 'loc':29 'mix':31 'norma':5B,27 'of':10C,20 'old':3A 'rags':1A 'records':12C 'sounds':9C 'the':7C 'trad':19 'unsorted':30 'va':13,14 'vbr':25,26 'waterson':6B,28 'world':15
                                    'tag_tracknum'  6
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['folk', 'female vocalists', 'british folk', 'english folk', '1996']
                                        'tag_date'  1996
                                     'discogstags'  ['folk, world, & country', 'folk']

============================== file details ==============================
                                           'mtime'  1621629895.0106008  (2021-05-21 22:44:55)
                             'size'  5199831