======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '145'
                                          'artist'  'Paul Robeson'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'John Henry'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['american', 'blues', 'spiritual', 'folk', 'gospel']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '143.517'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TBPM' (BPM (beats per minute))                     '143.517'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         'John Henry'
'TKEY' (Initial key)                                '4A'
'TLEN' (Length)                                     '144953'
'TPE1' (Lead performer(s)/Soloist(s))               'Paul Robeson'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['american', 'blues', 'spiritual', 'folk', 'gospel']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'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'                        '+2.04 dB'
'TXXX:replaygain_track_peak'                        '0.598340'

========================== row from database ==========================
                                              'id'  1523196
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/30_s collection/paul robeson - john henry.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  145
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  2332672
                                           'mtime'  1620527920
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 30_s collection paul robeson john henry prerock jb jazz unsorted
                                      'tag_artist'  Paul Robeson
                                     'tag_release'  None
                                       'tag_title'  John Henry
                                             'bpm'  143.517
                                    'search_title'  'henry':2 'john':1
                                   'search_artist'  'paul':1 'robeson':2
                                  'search_release'  
                                     'search_rest'  '30':5 'collection':7 'country':4 'exotica':2 'henry':11 'jazz':1 'jb':13 'john':10 'oldies':3 'paul':8 'prerock':12 'robeson':9 's':6 'unsorted':14
                                    'search_combo'  '30':9 'collection':11 'country':8 'exotica':6 'henry':2A,15 'jazz':5 'jb':17 'john':1A,14 'oldies':7 'paul':3B,12 'prerock':16 'robeson':4B,13 's':10 'unsorted':18
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['american', 'blues', 'spiritual', 'folk', 'gospel']
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527919.8454223  (2021-05-09 04:38:39)
                             'size'  2332672