======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '126'
                                          'artist'  'Homer and Jethro'
                                     'text_people'  ''
                                         'release'  '1968-1971 (Warped 7126)'
                                           'title'  'All I Want For Christmas Is My Upper Plate'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-1', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                     'discogstags'  "['country', 'folk, world, & country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '02'
                                      'tracktotal'  ''
                                            'date'  '1969'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country;set-th-christmas'
                                             'bpm'  '145.7'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '1968-1971 (Warped 7126)'
'TBPM' (BPM (beats per minute))                     '145.7'
'TCON' (Content type, a.k.a. Genre)                 ['loc-namerica-country', 'set-th-christmas']
'TDRC' (Recording time)                             '1969'
'TIT2' (Title/songname/content description)         'All I Want For Christmas Is My Upper Plate'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Homer and Jethro'
'TPE2' (Band/orchestra/accompaniment)               'Homer and Jethro'
'TRCK' (Track number/Position in set)               '02'
'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'                                  ['country', 'folk, world, & country']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'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'                        '+1.39 dB'
'TXXX:replaygain_track_peak'                        '0.793229'
'TXXX:tracknum'                                     ' 02'

========================== row from database ==========================
                                              'id'  647115
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Warped Records Collection/Warped 7126 - Homer & Jethro  -  Classics 1968 - 1971/02 - 02. All I Want For Christmas Is My Upper Plate.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  126
                                           'genre'  loc-namerica-country;set-th-christmas
                                        'filesize'  5862755
                                           'mtime'  1621628958
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Records Collection & Classics 02 02. loc namerica country;set christmas
                                      'tag_artist'  Homer and Jethro
                                     'tag_release'  1968-1971 (Warped 7126)
                                       'tag_title'  All I Want For Christmas Is My Upper Plate
                                             'bpm'  145.7
                                    'search_title'  'all':1 'christmas':5 'for':4 'i':2 'is':6 'my':7 'plate':9 'upper':8 'want':3
                                   'search_artist'  'and':2 'homer':1 'jethro':3
                                  'search_release'  '1968':1 '19681971':3 '1971':2 '7126':6,7 'warped':4,5
                                     'search_rest'  '02':4,5 'christmas':12 'classics':3 'collection':2 'country':8,10 'loc':6 'namerica':7 'records':1 'set':9,11
                                    'search_combo'  '02':23,24 '1968':13C '19681971':15C '1971':14C '7126':18C,19C 'all':1A 'and':11B 'christmas':5A,31 'classics':22 'collection':21 'country':27,29 'for':4A 'homer':10B 'i':2A 'is':6A 'jethro':12B 'loc':25 'my':7A 'namerica':26 'plate':9A 'records':20 'set':28,30 'upper':8A 'want':3A 'warped':16C,17C
                                    'tag_tracknum'  2
                                      'num_images'  1
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1969
                                     'discogstags'  ['country', 'folk, world, & country']

============================== file details ==============================
                                           'mtime'  1621628958.0738223  (2021-05-21 22:29:18)
                             'size'  5862755